First Interstate BancSystem

37.35

+0.19000.51%

盤後：37.28-0.0700-0.19%19:30 EDT

成交量：401.82萬

成交額：1.50億

市值：35.69億

市盈率：11.51

高：37.50

開：37.11

低：36.76

收：37.16

52周最高：40.60

52周最低：29.10

股本：9,554.80萬

流通股本：8,037.49萬

量比：3.46

換手率：5.00%

股息：1.88

股息率：5.03%

每股收益(TTM):3.25

每股收益(LYR):2.95

淨資產收益率：9.62%

總資產收益率：1.21%

市淨率：1.07

市盈率(LYR):12.68

資料載入中...

總覽公司新聞資訊公告

2026/09/16

{"basename":"/hant","ssrTDKData":{"titleTemplate":"%s - 老虎證券","title":"Easy breezy. No more feesies.","description":"Tiger Trade is a mobile trading app offering real time data, low commission fees and a free demo account. Download now to start investing in ETFs, options and the global share market.","keywords":"老虎國際,美股交易,港股交易,交易美股,股票信息,股價,美股行情,美股打新,港股打新,IPO打新,購買美股,全球投資","social":{"ogDescription":"Tiger Trade is a mobile trading app offering real time data, low commission fees and a free demo account. Download now to start investing in ETFs, options and the global share market.","ogImage":"https://c1.itigergrowtha.com/portal5/static/media/og-logo.0a0bd8dc.png","ogUrl":"https://www.thetigerbrokers.com/hant/stock/FIBK/filings"},"companyName":"老虎證券"},"pageData":{"isMobile":false,"isTiger":false,"isTTM":true,"region":"NZL","license":"TBKIWI","edition":"fundamental","symbol":"FIBK","isAnalysisPage":false},"__swrFallback__":{"@#url:\"https://hq.skytigris.cn/stock_info/detail/global\",params:#delay:false,,method:\"POST\",data:#items:@#symbol:\"FIBK\",,,,,undefined,":{"symbol":"FIBK","market":"US","secType":"STK","nameCN":"First Interstate BancSystem","latestPrice":37.35,"timestamp":1789761600000,"preClose":37.16,"halted":0,"volume":4018246,"hourTrading":{"tag":"盘后","latestPrice":37.28,"preClose":37.35,"latestTime":"19:30 EDT","volume":400127,"amount":14944308.6552,"timestamp":1789774206985,"change":-0.07,"changeRate":-0.001874,"amplitude":0.005957},"delay":0,"changeRate":0.005113024757804221,"floatShares":80374882,"shares":95548000,"eps":3.246287,"marketStatus":"休市中","change":0.19,"latestTime":"09-18 16:00:00 EDT","open":37.11,"high":37.5,"low":36.755,"amount":149663791.4283,"amplitude":0.020048,"askPrice":0,"askSize":0,"bidPrice":0,"bidSize":0,"shortable":3,"etf":0,"ttmEps":3.246287,"tradingStatus":0,"nextMarketStatus":{"tag":"盤前交易","tradingStatus":1,"beginTime":1789977600000},"marketStatusCode":7,"adr":0,"adrRate":0,"listingDate":1269403200000,"exchange":"NASDAQ","adjPreClose":37.16,"dividendRate":0.050343,"preHourTrading":{"tag":"盘前","latestPrice":37.15,"preClose":37.16,"latestTime":"09:29 EDT","volume":1379,"amount":51230.00169,"timestamp":1789738199999,"change":-0.01,"changeRate":-0.000269,"amplitude":0.000538},"postHourTrading":{"tag":"盘后","latestPrice":37.28,"preClose":37.35,"latestTime":"19:30 EDT","volume":400127,"amount":14944308.6552,"timestamp":1789774206985,"change":-0.07,"changeRate":-0.001874,"amplitude":0.005957},"volumeRatio":3.455819052522286,"impliedVol":0.3665,"impliedVolPercentile":0.3187},"@#url:\"https://hq.skytigris.cn/stock_info/fundamental/all\",params:#delay:false,,method:\"POST\",data:#items:@#symbol:\"FIBK\",,,,,undefined,":{"symbol":"FIBK","floatShares":80374882,"roa":"1.21%","roe":"9.62%","lyrEps":2.945305,"volumeRatio":3.455819052522286,"shares":95548000,"dividePrice":1.8803,"high":37.5,"amplitude":0.020048,"preClose":37.16,"low":36.755,"week52Low":29.1,"pbRate":"1.07","psRate":"3.37","week52High":40.6,"institutionHeld":0,"latestPrice":37.35,"eps":3.246287,"divideRate":0.050343,"volume":4018246,"delay":0,"ttmEps":3.246287,"open":37.11,"prevYearClose":34.6,"prevWeekClose":36.92,"prevMonthClose":36.81,"prevQuarterClose":38.56,"fiveDayClose":36.92,"twentyDayClose":37.81,"sixtyDayClose":37.88,"dividendPayoutRate":0.6383018454732345,"dividendFrequency":"Q","dividendGrowthYears":4,"dividendGrowthRate":0,"fiveYearAvgDividendRate":0.05136604012703498},"@#url:\"https://hq.skytigris.cn/fundamental/corporate_actions/details/FIBK\",params:#limit:5,,,undefined,":[{"date":"2026-08-04","symbol":"FIBK","amount":0.47,"announcedDate":"2026-07-22","type":"dividend","lastAmount":null,"market":"US","newRecordDate":"2026-08-04","defaultRemindTime":1785850200000,"name":"First Interstate BancSystem","lastCurrency":null,"lastExecuteDate":null,"recordDate":"2026-08-14","payableDate":"2026-08-04","currency":"USD","dateTimestamp":1785816000000,"payDate":"2026-08-14"},{"market":"US","date":"2026-07-23","symbol":"FIBK","fiscalQuarterEnding":"2026/06","expectedEps":0.64,"name":null,"time":"盤後","type":"earning","dateTimestamp":1784779200000,"reportTimeType":"post","actualEps":0.87},{"date":"2026-05-11","symbol":"FIBK","amount":0.47,"announcedDate":"2026-04-28","type":"dividend","lastAmount":null,"market":"US","newRecordDate":"2026-05-11","defaultRemindTime":1778506200000,"name":"First Interstate BancSystem","lastCurrency":null,"lastExecuteDate":null,"recordDate":"2026-05-21","payableDate":"2026-05-11","currency":"USD","dateTimestamp":1778472000000,"payDate":"2026-05-21"},{"date":"2026-04-29","symbol":"FIBK","type":"earning","reportTimeType":"post","market":"US","fiscalQuarterEnding":"2026/03","expectedEps":0.6,"defaultRemindTime":1777492800000,"name":null,"time":"盤後","dateTimestamp":1777435200000,"actualEps":null},{"date":"2026-02-10","symbol":"FIBK","amount":0.47,"announcedDate":"2026-01-28","type":"dividend","lastAmount":null,"market":"US","newRecordDate":"2026-02-10","defaultRemindTime":1770733800000,"name":"First Interstate BancSystem","lastCurrency":null,"lastExecuteDate":null,"recordDate":"2026-02-20","payableDate":"2026-02-10","currency":"USD","dateTimestamp":1770699600000,"payDate":"2026-02-20"}],"@#url:\"https://hq.skytigris.cn/fundamental/dividend/history\",params:#symbol:\"FIBK\",market:\"US\",,,undefined,":[{"executeDate":"2016-10-27","recordDate":"2016-10-31","paymentDate":"2016-11-14","value":0.22,"currency":"USD"},{"executeDate":"2017-01-26","recordDate":"2017-01-30","paymentDate":"2017-02-10","value":0.24,"currency":"USD"},{"executeDate":"2017-04-28","recordDate":"2017-05-02","paymentDate":"2017-05-12","value":0.24,"currency":"USD"},{"executeDate":"2017-07-31","recordDate":"2017-08-02","paymentDate":"2017-08-11","value":0.24,"currency":"USD"},{"executeDate":"2017-10-30","recordDate":"2017-10-31","paymentDate":"2017-11-13","value":0.24,"currency":"USD"}],"@#url:\"https://hq.skytigris.cn/fundamental/estimate/recommendation\",params:#symbol:\"FIBK\",market:\"US\",delay:false,,,undefined,":{"strongBuy":0,"buy":0.125,"hold":0.5,"sell":0.375,"strongSell":0,"meanLabel":"HOLD","meanPercent":0.5,"analysts":8,"updateTime":1785816000000},"@#url:\"https://hq.skytigris.cn/value_analysis/stock/FIBK\",params:#withQuantilePoint:true,period:\"5year\",factor:\"peRate\",delay:false,algorithm:1,,,undefined,":{"brief":{"id":"FIBK","date":"2026-09-18","current":11.505452,"percent":0.212171,"low":7.787967,"twenty":10.849973,"median":12.992171,"eighty":15.459896,"high":41.062658,"avg":15.415088,"sd":7.623182,"marketCap":3541519196},"quantilePoints":[{"date":"2021-09-24","current":12.801929,"twenty":14.269862,"median":16.400074,"eighty":21.419799,"marketCap":2420844716},{"date":"2021-10-01","current":13.381142,"twenty":14.230087,"median":16.396214,"eighty":21.419799,"marketCap":2530373937},{"date":"2021-10-08","current":13.87479,"twenty":14.21925,"median":16.385412,"eighty":21.419799,"marketCap":2623722705},{"date":"2021-10-15","current":13.397597,"twenty":14.197726,"median":16.354791,"eighty":21.419799,"marketCap":2533485563},{"date":"2021-10-22","current":13.907699,"twenty":14.182333,"median":16.286198,"eighty":21.419799,"marketCap":2629945957},{"date":"2021-10-29","current":13.767991,"twenty":14.161919,"median":16.262933,"eighty":21.419799,"marketCap":2587005523},{"date":"2021-11-05","current":14.314156,"twenty":14.143138,"median":16.241825,"eighty":21.419799,"marketCap":2689630000},{"date":"2021-11-12","current":14.310845,"twenty":14.143138,"median":16.216592,"eighty":21.419799,"marketCap":2689007689},{"date":"2021-11-19","current":14.380395,"twenty":14.143138,"median":16.201542,"eighty":21.419799,"marketCap":2702076229},{"date":"2021-11-26","current":13.443119,"twenty":14.138676,"median":16.189331,"eighty":21.419799,"marketCap":2525962094},{"date":"2021-12-03","current":13.270899,"twenty":14.12055,"median":16.178995,"eighty":21.419799,"marketCap":2493601900},{"date":"2021-12-10","current":13.231156,"twenty":14.097579,"median":16.158164,"eighty":21.419165,"marketCap":2486134162},{"date":"2021-12-17","current":12.834095,"twenty":14.08029,"median":16.146207,"eighty":21.324086,"marketCap":2411526450},{"date":"2021-12-23","current":12.946646,"twenty":14.03659,"median":16.133208,"eighty":21.261189,"marketCap":2432674735},{"date":"2021-12-31","current":13.463055,"twenty":13.984338,"median":16.125598,"eighty":21.225793,"marketCap":2529708040},{"date":"2022-01-07","current":14.737527,"twenty":13.971811,"median":16.092298,"eighty":21.15896,"marketCap":2769181263},{"date":"2022-01-14","current":14.658079,"twenty":13.971811,"median":16.062546,"eighty":21.106718,"marketCap":2754253062},{"date":"2022-01-21","current":12.797682,"twenty":13.966313,"median":16.033398,"eighty":21.058854,"marketCap":2404684358},{"date":"2022-01-28","current":12.077518,"twenty":13.937601,"median":15.980965,"eighty":21.036057,"marketCap":2320091220},{"date":"2022-02-04","current":11.88648,"twenty":13.913669,"median":15.955917,"eighty":21.004593,"marketCap":2283392726},{"date":"2022-02-11","current":12.190846,"twenty":13.887963,"median":15.938502,"eighty":20.947399,"marketCap":2341861513},{"date":"2022-02-18","current":12.49845,"twenty":13.831116,"median":15.909427,"eighty":20.840149,"marketCap":2400952308},{"date":"2022-02-25","current":12.885295,"twenty":13.810209,"median":15.905797,"eighty":20.815092,"marketCap":2475265153},{"date":"2022-03-04","current":12.474028,"twenty":13.773949,"median":15.88834,"eighty":20.791465,"marketCap":2396260711},{"date":"2022-03-11","current":12.639182,"twenty":13.75297,"median":15.87107,"eighty":20.687589,"marketCap":2427986904},{"date":"2022-03-18","current":12.33478,"twenty":13.708671,"median":15.829814,"eighty":20.58355,"marketCap":2369511175},{"date":"2022-03-25","current":16.782964,"twenty":13.65922,"median":15.810785,"eighty":20.559491,"marketCap":3224007305},{"date":"2022-04-01","current":11.781026,"twenty":13.579291,"median":15.800472,"eighty":20.503527,"marketCap":2263135116},{"date":"2022-04-08","current":11.152791,"twenty":13.523854,"median":15.776148,"eighty":20.470143,"marketCap":2142451165},{"date":"2022-04-14","current":11.123646,"twenty":13.489499,"median":15.766998,"eighty":20.470143,"marketCap":2136852425},{"date":"2022-04-22","current":11.220796,"twenty":13.440129,"median":15.734268,"eighty":20.460692,"marketCap":2155514892},{"date":"2022-04-29","current":18.853787,"twenty":13.391717,"median":15.722549,"eighty":20.420056,"marketCap":2023011379},{"date":"2022-05-06","current":20.135056,"twenty":13.391717,"median":15.722549,"eighty":20.452288,"marketCap":2160491550},{"date":"2022-05-13","current":34.919586,"twenty":13.391717,"median":15.722549,"eighty":20.557751,"marketCap":3746871607},{"date":"2022-05-20","current":34.297116,"twenty":13.391717,"median":15.722549,"eighty":20.659156,"marketCap":3680080500},{"date":"2022-05-27","current":38.848295,"twenty":13.391717,"median":15.722549,"eighty":20.791465,"marketCap":4168422037},{"date":"2022-06-03","current":39.185041,"twenty":13.391717,"median":15.722549,"eighty":20.791465,"marketCap":4204554931},{"date":"2022-06-10","current":37.011496,"twenty":13.391717,"median":15.722549,"eighty":20.791465,"marketCap":3971333524},{"date":"2022-06-17","current":37.062518,"twenty":13.391717,"median":15.722549,"eighty":20.791465,"marketCap":3976808205},{"date":"2022-06-24","current":38.705433,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4153092930},{"date":"2022-07-01","current":39.511583,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4239592888},{"date":"2022-07-08","current":39.511583,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4239592888},{"date":"2022-07-15","current":38.756455,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4158567611},{"date":"2022-07-22","current":40.338143,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4328282719},{"date":"2022-07-29","current":34.091321,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4394371240},{"date":"2022-08-05","current":33.620541,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4333687724},{"date":"2022-08-12","current":34.308366,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4422348331},{"date":"2022-08-19","current":34.117764,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4397779729},{"date":"2022-08-26","current":33.322207,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4295232521},{"date":"2022-09-02","current":32.64267,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4207640115},{"date":"2022-09-09","current":33.620541,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4333687724},{"date":"2022-09-16","current":34.664709,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4468280934},{"date":"2022-09-23","current":34.382949,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4431962131},{"date":"2022-09-30","current":33.438226,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4310187322},{"date":"2022-10-07","current":34.399523,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4434098532},{"date":"2022-10-14","current":35.667441,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4597533144},{"date":"2022-10-21","current":34.954755,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4505667937},{"date":"2022-10-28","current":28.086406,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4704473040},{"date":"2022-11-04","current":28.666343,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4801612470},{"date":"2022-11-11","current":27.443246,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4596743761},{"date":"2022-11-18","current":27.536782,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4612410917},{"date":"2022-11-25","current":27.792445,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4655234479},{"date":"2022-12-02","current":26.869563,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4500651866},{"date":"2022-12-09","current":25.235814,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4226998864},{"date":"2022-12-16","current":23.502294,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":3936634227},{"date":"2022-12-23","current":23.901378,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4003480762},{"date":"2022-12-30","current":24.10092,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4036904030},{"date":"2023-01-06","current":24.506239,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4104795042},{"date":"2023-01-13","current":24.568596,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":4115239813},{"date":"2023-01-20","current":23.639479,"twenty":13.389896,"median":15.722243,"eighty":20.780261,"marketCap":3959612724},{"date":"2023-01-27","current":17.366627,"twenty":13.389896,"median":15.722243,"eighty":20.753663,"marketCap":3511532043},{"date":"2023-02-03","current":19.417356,"twenty":13.389896,"median":15.722243,"eighty":20.611903,"marketCap":3926189456},{"date":"2023-02-10","current":18.952456,"twenty":13.389896,"median":15.722243,"eighty":20.479593,"marketCap":3832186516},{"date":"2023-02-17","current":19.17974,"twenty":13.389896,"median":15.722243,"eighty":20.389812,"marketCap":3878143509},{"date":"2023-02-24","current":18.558708,"twenty":13.389896,"median":15.722243,"eighty":20.366185,"marketCap":3752570771},{"date":"2023-03-03","current":18.145489,"twenty":13.389896,"median":15.722243,"eighty":20.318932,"marketCap":3669017845},{"date":"2023-03-10","current":16.394472,"twenty":13.389896,"median":15.722243,"eighty":20.177172,"marketCap":3314962323},{"date":"2023-03-17","current":15.36659,"twenty":13.389896,"median":15.718848,"eighty":20.111709,"marketCap":3107124420},{"date":"2023-03-24","current":15.531877,"twenty":13.389896,"median":15.674614,"eighty":20.044863,"marketCap":3140545590},{"date":"2023-03-31","current":15.423407,"twenty":13.391717,"median":15.6678,"eighty":19.973935,"marketCap":3118612948},{"date":"2023-04-06","current":14.968866,"twenty":13.388075,"median":15.647111,"eighty":19.913655,"marketCap":3026704729},{"date":"2023-04-14","current":15.255247,"twenty":13.383775,"median":15.618205,"eighty":19.842618,"marketCap":3084610880},{"date":"2023-04-21","current":14.919683,"twenty":13.383117,"median":15.605714,"eighty":19.789773,"marketCap":3016759879},{"date":"2023-04-28","current":13.613565,"twenty":13.382458,"median":15.577273,"eighty":19.774637,"marketCap":2752662907},{"date":"2023-05-05","current":8.257199,"twenty":13.338359,"median":15.56339,"eighty":19.775519,"marketCap":2410276318},{"date":"2023-05-12","current":7.803035,"twenty":13.270899,"median":15.54321,"eighty":19.768982,"marketCap":2277705902},{"date":"2023-05-19","current":8.420874,"twenty":13.22122,"median":15.519097,"eighty":19.665026,"marketCap":2458052986},{"date":"2023-05-26","current":8.349359,"twenty":13.146917,"median":15.495211,"eighty":19.38781,"marketCap":2437177802},{"date":"2023-06-02","current":8.134814,"twenty":13.118645,"median":15.478906,"eighty":19.264301,"marketCap":2374552248},{"date":"2023-06-09","current":9.00372,"twenty":12.962369,"median":15.456117,"eighty":19.154946,"marketCap":2628185741},{"date":"2023-06-16","current":9.207537,"twenty":12.890966,"median":15.419461,"eighty":19.120677,"marketCap":2687680017},{"date":"2023-06-23","current":8.503116,"twenty":12.831447,"median":15.392408,"eighty":18.996547,"marketCap":2482059448},{"date":"2023-06-30","current":8.731963,"twenty":12.805928,"median":15.376437,"eighty":18.90481,"marketCap":2548860039},{"date":"2023-07-07","current":8.310026,"twenty":12.755737,"median":15.366168,"eighty":18.882965,"marketCap":2425696450},{"date":"2023-07-13","current":8.710509,"twenty":12.722506,"median":15.349006,"eighty":18.8358,"marketCap":2542597484},{"date":"2023-07-20","current":9.529354,"twenty":12.670289,"median":15.336768,"eighty":18.716321,"marketCap":2781618347},{"date":"2023-07-28","current":10.18148,"twenty":12.629345,"median":15.311145,"eighty":18.706485,"marketCap":3001500180},{"date":"2023-08-04","current":10.388102,"twenty":12.606799,"median":15.282736,"eighty":18.706485,"marketCap":3062412360},{"date":"2023-08-11","current":10.234654,"twenty":12.556384,"median":15.259122,"eighty":18.706485,"marketCap":3017176017},{"date":"2023-08-18","current":9.507933,"twenty":12.527002,"median":15.244965,"eighty":18.706485,"marketCap":2802938667},{"date":"2023-08-25","current":9.08045,"twenty":12.476083,"median":15.219783,"eighty":18.668144,"marketCap":2676916696},{"date":"2023-09-01","current":9.230069,"twenty":12.443517,"median":15.186202,"eighty":18.560774,"marketCap":2721024386},{"date":"2023-09-08","current":8.816836,"twenty":12.41952,"median":15.157235,"eighty":18.502606,"marketCap":2599203147},{"date":"2023-09-15","current":9.119636,"twenty":12.399465,"median":15.093818,"eighty":18.347234,"marketCap":2688468710},{"date":"2023-09-22","current":8.727777,"twenty":12.33737,"median":15.065046,"eighty":18.138529,"marketCap":2572948570},{"date":"2023-09-29","current":8.756276,"twenty":12.308572,"median":15.038543,"eighty":18.112915,"marketCap":2581350035},{"date":"2023-10-06","current":8.774087,"twenty":12.267881,"median":15.010188,"eighty":18.030545,"marketCap":2586600950},{"date":"2023-10-13","current":8.603094,"twenty":12.206975,"median":14.969253,"eighty":17.91884,"marketCap":2536192162},{"date":"2023-10-20","current":8.346604,"twenty":12.175165,"median":14.93963,"eighty":17.871861,"marketCap":2460578979},{"date":"2023-10-27","current":8.798731,"twenty":12.128932,"median":14.918194,"eighty":17.838901,"marketCap":2479482275},{"date":"2023-11-03","current":9.196847,"twenty":12.077518,"median":14.909359,"eighty":17.838901,"marketCap":2591671480},{"date":"2023-11-10","current":8.688965,"twenty":12.012826,"median":14.876373,"eighty":17.838901,"marketCap":2448550235},{"date":"2023-11-17","current":9.523582,"twenty":11.961094,"median":14.824827,"eighty":17.838901,"marketCap":2683745454},{"date":"2023-11-24","current":9.475145,"twenty":11.941624,"median":14.800914,"eighty":17.838901,"marketCap":2670095732},{"date":"2023-12-01","current":9.646539,"twenty":11.899762,"median":14.770112,"eighty":17.838901,"marketCap":2718394750},{"date":"2023-12-08","current":10.481157,"twenty":11.859002,"median":14.745188,"eighty":17.826733,"marketCap":2953589970},{"date":"2023-12-15","current":11.975271,"twenty":11.787285,"median":14.72411,"eighty":17.838901,"marketCap":3374631413},{"date":"2023-12-22","current":11.539333,"twenty":11.759706,"median":14.72411,"eighty":17.838901,"marketCap":3251783910},{"date":"2023-12-29","current":11.714453,"twenty":11.744827,"median":14.725321,"eighty":17.85107,"marketCap":3301132907},{"date":"2024-01-05","current":11.278515,"twenty":11.719967,"median":14.72411,"eighty":17.855074,"marketCap":3178285403},{"date":"2024-01-12","current":11.0326,"twenty":11.652602,"median":14.681165,"eighty":17.855074,"marketCap":3108986812},{"date":"2024-01-19","current":10.645099,"twenty":11.605303,"median":14.648596,"eighty":17.859078,"marketCap":2999789031},{"date":"2024-01-26","current":10.611566,"twenty":11.544596,"median":14.637451,"eighty":17.855074,"marketCap":2990339223},{"date":"2024-02-02","current":10.668688,"twenty":11.52455,"median":14.622084,"eighty":17.855074,"marketCap":2747187060},{"date":"2024-02-09","current":10.260993,"twenty":11.457372,"median":14.599194,"eighty":17.855074,"marketCap":2642205640},{"date":"2024-02-16","current":10.809968,"twenty":11.424314,"median":14.561831,"eighty":17.855074,"marketCap":2783566760},{"date":"2024-02-23","current":10.761529,"twenty":11.386337,"median":14.532849,"eighty":17.855074,"marketCap":2771093720},{"date":"2024-03-01","current":10.624285,"twenty":11.297144,"median":14.501875,"eighty":17.85107,"marketCap":2735753440},{"date":"2024-03-08","current":10.760892,"twenty":11.271063,"median":14.45946,"eighty":17.85107,"marketCap":2770929601},{"date":"2024-03-15","current":10.098931,"twenty":11.220796,"median":14.43276,"eighty":17.85107,"marketCap":2600474816},{"date":"2024-03-22","current":10.716492,"twenty":11.185174,"median":14.414545,"eighty":17.85107,"marketCap":2759496658},{"date":"2024-03-28","current":11.152417,"twenty":11.156029,"median":14.401588,"eighty":17.85107,"marketCap":2871747369},{"date":"2024-04-05","current":10.40973,"twenty":11.111394,"median":14.384327,"eighty":17.855074,"marketCap":2680505416},{"date":"2024-04-12","current":10.127186,"twenty":11.059446,"median":14.372356,"eighty":17.855074,"marketCap":2607750325},{"date":"2024-04-19","current":9.969768,"twenty":10.955022,"median":14.343798,"eighty":17.855074,"marketCap":2567215346},{"date":"2024-04-26","current":10.855992,"twenty":10.864932,"median":14.314238,"eighty":17.85107,"marketCap":2818215400},{"date":"2024-05-03","current":11.234642,"twenty":10.859527,"median":14.286158,"eighty":17.85107,"marketCap":2916513080},{"date":"2024-05-10","current":11.169766,"twenty":10.859527,"median":14.239936,"eighty":17.85107,"marketCap":2899671166},{"date":"2024-05-17","current":11.137541,"twenty":10.859527,"median":14.225048,"eighty":17.85107,"marketCap":2891305725},{"date":"2024-05-24","current":10.920027,"twenty":10.859527,"median":14.218258,"eighty":17.85107,"marketCap":2834838995},{"date":"2024-05-31","current":10.678344,"twenty":10.846302,"median":14.209997,"eighty":17.85107,"marketCap":2772098183},{"date":"2024-06-07","current":10.553475,"twenty":10.78686,"median":14.209997,"eighty":17.85107,"marketCap":2739682097},{"date":"2024-06-14","current":10.468886,"twenty":10.759771,"median":14.20743,"eighty":17.855074,"marketCap":2717722813},{"date":"2024-06-21","current":10.456802,"twenty":10.716252,"median":14.195355,"eighty":17.859078,"marketCap":2714585773},{"date":"2024-06-28","current":10.762933,"twenty":10.708419,"median":14.182624,"eighty":17.871091,"marketCap":2794057467},{"date":"2024-07-05","current":11.16171,"twenty":10.708419,"median":14.155597,"eighty":17.871091,"marketCap":2897579806},{"date":"2024-07-12","current":11.782028,"twenty":10.708419,"median":14.134522,"eighty":17.871091,"marketCap":3058614555},{"date":"2024-07-15","current":11.749804,"twenty":10.708419,"median":14.120802,"eighty":17.871091,"marketCap":3050249114},{"date":"2024-08-02","current":12.298129,"twenty":10.703505,"median":14.079319,"eighty":17.884954,"marketCap":3106507310},{"date":"2024-08-09","current":11.770979,"twenty":10.703505,"median":14.014558,"eighty":17.884954,"marketCap":2973349357},{"date":"2024-08-16","current":11.957229,"twenty":10.703505,"median":13.950151,"eighty":17.884954,"marketCap":3020396024},{"date":"2024-08-23","current":12.068979,"twenty":10.703505,"median":13.922959,"eighty":17.884954,"marketCap":3048624024},{"date":"2024-08-30","current":12.702228,"twenty":10.703505,"median":13.907699,"eighty":17.884954,"marketCap":3208582692},{"date":"2024-09-06","current":12.375256,"twenty":10.703505,"median":13.87479,"eighty":17.884954,"marketCap":3125989655},{"date":"2024-09-13","current":12.060701,"twenty":10.703505,"median":13.820557,"eighty":17.884954,"marketCap":3046533061},{"date":"2024-09-20","current":13.24856,"twenty":10.703505,"median":13.795325,"eighty":17.884954,"marketCap":3346586249},{"date":"2024-09-27","current":12.5077,"twenty":10.703505,"median":13.756248,"eighty":17.884954,"marketCap":3159445062},{"date":"2024-10-04","current":12.222117,"twenty":10.703505,"median":13.711653,"eighty":17.884954,"marketCap":3087306839},{"date":"2024-10-11","current":12.284201,"twenty":10.703505,"median":13.663743,"eighty":17.884954,"marketCap":3102989062},{"date":"2024-10-18","current":13.592087,"twenty":10.703505,"median":13.602073,"eighty":17.884954,"marketCap":3433361213},{"date":"2024-10-25","current":14.214126,"twenty":10.703505,"median":13.557699,"eighty":17.884954,"marketCap":3346005300},{"date":"2024-10-31","current":14.036505,"twenty":10.703505,"median":13.557699,"eighty":17.884954,"marketCap":3304193300},{"date":"2024-11-08","current":14.480539,"twenty":10.703213,"median":13.534197,"eighty":17.885724,"marketCap":3408718832},{"date":"2024-11-15","current":14.778054,"twenty":10.703213,"median":13.534197,"eighty":17.885724,"marketCap":3478753840},{"date":"2024-11-22","current":15.022282,"twenty":10.703213,"median":13.534197,"eighty":17.885724,"marketCap":3536245265},{"date":"2024-11-29","current":15.528502,"twenty":10.703213,"median":13.534197,"eighty":17.885724,"marketCap":3655409309},{"date":"2024-12-06","current":15.222106,"twenty":10.703213,"median":13.534197,"eighty":17.885724,"marketCap":3583283703},{"date":"2024-12-13","current":15.128855,"twenty":10.703213,"median":13.534197,"eighty":17.885724,"marketCap":3561332432},{"date":"2024-12-20","current":13.996522,"twenty":10.703213,"median":13.534197,"eighty":17.885724,"marketCap":3294781281},{"date":"2024-12-27","current":14.644838,"twenty":10.703213,"median":13.534197,"eighty":17.885724,"marketCap":3447394881},{"date":"2025-01-03","current":14.191905,"twenty":10.703213,"median":13.534197,"eighty":17.885724,"marketCap":3340774421},{"date":"2025-01-10","current":14.138619,"twenty":10.70292,"median":13.525917,"eighty":17.886494,"marketCap":3328230837},{"date":"2025-01-17","current":14.445015,"twenty":10.70292,"median":13.515601,"eighty":17.886494,"marketCap":3400356443},{"date":"2025-01-24","current":14.484979,"twenty":10.70292,"median":13.515601,"eighty":17.886494,"marketCap":3409764131},{"date":"2025-01-31","current":15.502792,"twenty":10.70292,"median":13.515601,"eighty":17.886494,"marketCap":3503631000},{"date":"2025-02-07","current":15.377844,"twenty":10.70292,"median":13.515601,"eighty":17.886494,"marketCap":3475392780},{"date":"2025-02-14","current":15.109438,"twenty":10.70292,"median":13.515601,"eighty":17.886494,"marketCap":3414732900},{"date":"2025-02-21","current":14.887308,"twenty":10.70292,"median":13.515601,"eighty":17.886494,"marketCap":3364531620},{"date":"2025-02-28","current":14.137621,"twenty":10.70292,"median":13.525917,"eighty":17.886494,"marketCap":3195102300},{"date":"2025-03-07","current":13.367057,"twenty":10.702216,"median":13.554661,"eighty":17.888034,"marketCap":3020954916},{"date":"2025-03-14","current":12.99241,"twenty":10.716372,"median":13.554661,"eighty":17.888034,"marketCap":2936284554},{"date":"2025-03-21","current":13.242175,"twenty":10.751564,"median":13.554661,"eighty":17.888034,"marketCap":2992731462},{"date":"2025-03-28","current":13.459563,"twenty":10.77555,"median":13.559528,"eighty":17.888034,"marketCap":3041861179},{"date":"2025-04-04","current":11.859216,"twenty":10.829371,"median":13.559528,"eighty":17.888034,"marketCap":2680182839},{"date":"2025-04-11","current":11.341185,"twenty":10.855992,"median":13.55691,"eighty":17.886494,"marketCap":2563107770},{"date":"2025-04-17","current":12.025726,"twenty":10.898127,"median":13.55691,"eighty":17.886494,"marketCap":2717814112},{"date":"2025-04-25","current":12.92998,"twenty":10.948247,"median":13.559528,"eighty":17.888034,"marketCap":2922175440},{"date":"2025-05-02","current":12.836784,"twenty":10.948247,"median":13.559528,"eighty":17.888034,"marketCap":2795851500},{"date":"2025-05-09","current":13.1133,"twenty":10.948247,"median":13.559528,"eighty":17.888034,"marketCap":2856076740},{"date":"2025-05-16","current":13.334825,"twenty":10.977351,"median":13.584411,"eighty":17.888034,"marketCap":2904324823},{"date":"2025-05-23","current":12.747303,"twenty":11.007755,"median":13.584411,"eighty":17.888034,"marketCap":2776362516},{"date":"2025-05-30","current":13.103668,"twenty":11.007755,"median":13.584411,"eighty":17.888034,"marketCap":2853978997},{"date":"2025-06-06","current":13.098853,"twenty":11.007755,"median":13.584411,"eighty":17.888034,"marketCap":2852930126},{"date":"2025-06-13","current":13.219247,"twenty":11.007755,"median":13.584411,"eighty":17.888034,"marketCap":2879151910},{"date":"2025-06-20","current":12.622093,"twenty":11.001539,"median":13.585244,"eighty":17.889574,"marketCap":2749091860},{"date":"2025-06-27","current":13.970504,"twenty":11.001539,"median":13.592087,"eighty":17.889574,"marketCap":3042775844},{"date":"2025-07-03","current":14.986629,"twenty":11.001539,"median":13.633402,"eighty":17.889574,"marketCap":3264087703},{"date":"2025-07-11","current":15.111838,"twenty":11.03459,"median":13.680678,"eighty":17.889574,"marketCap":3291358359},{"date":"2025-07-18","current":14.818077,"twenty":11.043721,"median":13.72788,"eighty":17.889574,"marketCap":3227377205},{"date":"2025-07-25","current":14.220924,"twenty":11.043721,"median":13.756248,"eighty":17.889574,"marketCap":3097317155},{"date":"2025-08-01","current":13.156089,"twenty":11.043721,"median":13.767991,"eighty":17.889574,"marketCap":3019322460},{"date":"2025-08-08","current":13.160659,"twenty":11.043721,"median":13.767991,"eighty":17.889574,"marketCap":3020371200},{"date":"2025-08-15","current":13.985469,"twenty":11.043721,"median":13.774477,"eighty":17.889574,"marketCap":3209665178},{"date":"2025-08-22","current":13.720472,"twenty":11.043721,"median":13.805679,"eighty":17.889574,"marketCap":3148848262},{"date":"2025-08-29","current":14.643394,"twenty":11.043721,"median":13.820557,"eighty":17.889574,"marketCap":3360658901},{"date":"2025-09-05","current":14.997485,"twenty":11.041119,"median":13.854012,"eighty":17.891115,"marketCap":3441922884},{"date":"2025-09-12","current":14.839858,"twenty":11.043721,"median":13.899722,"eighty":17.889574,"marketCap":3405747304},{"date":"2025-09-19","current":15.461231,"twenty":11.043721,"median":13.922959,"eighty":17.889574,"marketCap":3548352487},{"date":"2025-09-26","current":14.935805,"twenty":11.043721,"median":13.952135,"eighty":17.889574,"marketCap":3427767222},{"date":"2025-10-03","current":14.478913,"twenty":11.043721,"median":13.976331,"eighty":17.889574,"marketCap":3322910470},{"date":"2025-10-10","current":14.323569,"twenty":11.043721,"median":14.036505,"eighty":17.889574,"marketCap":3287259175},{"date":"2025-10-17","current":13.391509,"twenty":11.043721,"median":14.049212,"eighty":17.889574,"marketCap":3073351401},{"date":"2025-10-24","current":14.273311,"twenty":11.043721,"median":14.079319,"eighty":17.889574,"marketCap":3275724932},{"date":"2025-10-31","current":13.336924,"twenty":11.043721,"median":14.080892,"eighty":17.889574,"marketCap":3272881160},{"date":"2025-11-07","current":13.46826,"twenty":11.043721,"median":14.079319,"eighty":17.889574,"marketCap":3305110930},{"date":"2025-11-14","current":13.173688,"twenty":11.043721,"median":14.036505,"eighty":17.889574,"marketCap":3232823091},{"date":"2025-11-21","current":12.829881,"twenty":11.043721,"median":13.976331,"eighty":17.889574,"marketCap":3148452788},{"date":"2025-11-28","current":13.769062,"twenty":11.043721,"median":13.952135,"eighty":17.889574,"marketCap":3378927763},{"date":"2025-12-05","current":14.117062,"twenty":11.043721,"median":13.940215,"eighty":17.889574,"marketCap":3464326973},{"date":"2025-12-12","current":14.871761,"twenty":11.043721,"median":13.940215,"eighty":17.889574,"marketCap":3649530078},{"date":"2025-12-19","current":14.922074,"twenty":11.043721,"median":13.940215,"eighty":17.889574,"marketCap":3661876952},{"date":"2025-12-26","current":15.035279,"twenty":11.043721,"median":13.940215,"eighty":17.889574,"marketCap":3689657418},{"date":"2026-01-02","current":14.50699,"twenty":11.043721,"median":13.940215,"eighty":17.889574,"marketCap":3560015244},{"date":"2026-01-09","current":15.731279,"twenty":11.043721,"median":13.940215,"eighty":17.889574,"marketCap":3860455837},{"date":"2026-01-16","current":15.62646,"twenty":11.043721,"median":13.940215,"eighty":17.889574,"marketCap":3834733183},{"date":"2026-01-23","current":16.024773,"twenty":11.043721,"median":13.940215,"eighty":17.889574,"marketCap":3932479267},{"date":"2026-01-30","current":12.095236,"twenty":11.043721,"median":13.917572,"eighty":17.889574,"marketCap":3653970840},{"date":"2026-02-06","current":12.717736,"twenty":11.043721,"median":13.87479,"eighty":17.889574,"marketCap":3842028000},{"date":"2026-02-13","current":12.496849,"twenty":11.043721,"median":13.831525,"eighty":17.889574,"marketCap":3775298040},{"date":"2026-02-20","current":12.429913,"twenty":11.043721,"median":13.805679,"eighty":17.889574,"marketCap":3755076840},{"date":"2026-02-27","current":12.312776,"twenty":11.043721,"median":13.769062,"eighty":17.859078,"marketCap":3719689740},{"date":"2026-03-06","current":11.715129,"twenty":11.043721,"median":13.739859,"eighty":17.731696,"marketCap":3539140570},{"date":"2026-03-13","current":11.122679,"twenty":11.043721,"median":13.725041,"eighty":17.48486,"marketCap":3360161175},{"date":"2026-03-20","current":10.804696,"twenty":11.025148,"median":13.693785,"eighty":16.402736,"marketCap":3264098788},{"date":"2026-03-27","current":11.213052,"twenty":11.001539,"median":13.641962,"eighty":16.234209,"marketCap":3387463117},{"date":"2026-04-02","current":11.229788,"twenty":10.982573,"median":13.613565,"eighty":16.197543,"marketCap":3392519032},{"date":"2026-04-10","current":11.470785,"twenty":10.982573,"median":13.585244,"eighty":16.106458,"marketCap":3465324209},{"date":"2026-04-17","current":11.303426,"twenty":10.982573,"median":13.556349,"eighty":16.028697,"marketCap":3414765058},{"date":"2026-04-24","current":11.236439,"twenty":10.982573,"median":13.528942,"eighty":15.913042,"marketCap":3394528266},{"date":"2026-05-01","current":11.072974,"twenty":10.982573,"median":13.49611,"eighty":15.796931,"marketCap":3455875162},{"date":"2026-05-08","current":11.310096,"twenty":10.971,"median":13.463055,"eighty":15.724586,"marketCap":3529880942},{"date":"2026-05-15","current":10.688518,"twenty":10.920027,"median":13.441457,"eighty":15.715136,"marketCap":3335886464},{"date":"2026-05-22","current":10.956198,"twenty":10.915138,"median":13.43114,"eighty":15.618746,"marketCap":3419429340},{"date":"2026-05-29","current":11.0807,"twenty":10.914221,"median":13.40746,"eighty":15.530527,"marketCap":3458286492},{"date":"2026-06-05","current":11.118051,"twenty":10.889329,"median":13.385899,"eighty":15.495077,"marketCap":3469943637},{"date":"2026-06-12","current":11.379505,"twenty":10.889329,"median":13.367057,"eighty":15.457226,"marketCap":3551543656},{"date":"2026-06-18","current":11.09315,"twenty":10.889329,"median":13.353181,"eighty":15.457226,"marketCap":3462172207},{"date":"2026-06-26","current":11.964666,"twenty":10.884931,"median":13.335151,"eighty":15.458561,"marketCap":3734172268},{"date":"2026-07-02","current":12.219896,"twenty":10.884931,"median":13.297885,"eighty":15.458561,"marketCap":3813829429},{"date":"2026-07-10","current":12.110956,"twenty":10.884931,"median":13.272804,"eighty":15.458561,"marketCap":3779829421},{"date":"2026-07-17","current":12.518701,"twenty":10.884931,"median":13.249032,"eighty":15.458561,"marketCap":3907086593},{"date":"2026-07-24","current":11.858839,"twenty":10.884931,"median":13.232425,"eighty":15.458561,"marketCap":3701143689},{"date":"2026-07-31","current":11.331409,"twenty":10.880532,"median":13.219247,"eighty":15.459896,"marketCap":3674776080},{"date":"2026-08-07","current":10.996911,"twenty":10.880532,"median":13.167228,"eighty":15.459896,"marketCap":3566298393},{"date":"2026-08-14","current":11.414218,"twenty":10.880532,"median":13.147599,"eighty":15.459896,"marketCap":3701630935},{"date":"2026-08-21","current":11.111524,"twenty":10.880532,"median":13.126543,"eighty":15.459896,"marketCap":3603467190},{"date":"2026-08-28","current":10.95283,"twenty":10.879129,"median":13.103668,"eighty":15.459896,"marketCap":3552002702},{"date":"2026-09-04","current":11.014544,"twenty":10.866274,"median":13.075665,"eighty":15.459896,"marketCap":3572016670},{"date":"2026-09-11","current":10.838217,"twenty":10.854202,"median":13.052413,"eighty":15.459896,"marketCap":3514833906},{"date":"2026-09-18","current":10.920503,"twenty":10.849973,"median":12.992171,"eighty":15.459896,"marketCap":3541519196}],"updateTime":1789806935747},"$inf$@#url:\"https://stock-news.skytigris.cn/v3/notice/important/events/list\",params:#symbol:\"FIBK\",pageSize:20,pageCount:1,market:\"us\",,,undefined,":[{"items":[{"cdn_pdf":false,"hasAttachments":true,"id":"21772975","market":"us","labels":[],"media":"sec.gov","original_id":"AN86041326000092-FIBK","pdf_url":"","pub_time":1789531200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 8-K - Current report","symbol":"FIBK","title":"Form 8-K - Current report","titleType":"重要事件披露","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000092/0000860413-26-000092-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"EX-10.1","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000092/fibk-20260914xex101xleeemp.htm","primary":true,"translateUrl":"","linkName":"fibk-20260914xex101xleeemp.htm","type":"EX-10.1","id":"NTFILEE7dXMqdiW89NBvue","market":"us","size":109773},{"description":"8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000092/fibk-20260914.htm","primary":false,"translateUrl":"","linkName":"fibk-20260914.htm","type":"8-K","id":"NTFILE8yrCb1rUiXoVy6JG","market":"us","size":35018}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"重要事件披露","pubTime":"2026-09-16 12:00","pubTimestamp":1789531200,"title_zh":"Form 8-K - Current report","summary_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"項目5.02：董事或若干高級職員離職；選舉董事；某些官員的任命：某些官員的薪酬安排；項目9.01：財務報表和附件","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21759266","market":"us","labels":[],"media":"sec.gov","original_id":"AN195824426000591-FIBK","pdf_url":"","pub_time":1789099200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 144 - Report of proposed sale of securities","symbol":"FIBK","title":"Form 144 - Report of proposed sale of securities","titleType":"關聯方擬減持公告","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000195824426000591/0001958244-26-000591-index.htm","us_notice_code":"Form 144","us_title_en":"Form 144 - Report of proposed sale of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000195824426000591/xsl144X01/primary_doc.xml","primary":true,"translateUrl":"","linkName":"primary_doc.html","type":"144","id":"NTFILEH8rtRp93HsTeA4Zv","market":"us","size":0}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Proposed Sale Of Securities","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"關聯方擬減持公告","pubTime":"2026-09-11 12:00","pubTimestamp":1789099200,"title_zh":"Form 144 - Report of proposed sale of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21651260","market":"us","labels":[],"media":"sec.gov","original_id":"AN86041326000088-FIBK","pdf_url":"","pub_time":1787284800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 8-K - Current report","symbol":"FIBK","title":"Form 8-K - Current report","titleType":"重要事件披露","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000088/0000860413-26-000088-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"8-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000088/fibk-20260821.htm","primary":true,"translateUrl":"","linkName":"fibk-20260821.htm","type":"8-K","id":"NTFILE6bcLiNKwJstW3MmU","market":"us","size":34014}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"重要事件披露","pubTime":"2026-08-21 12:00","pubTimestamp":1787284800,"title_zh":"Form 8-K - Current report","summary_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"項目5.02：董事或若干高級職員離職；選舉董事；某些官員的任命：某些官員的薪酬安排；項目9.01：財務報表和附件","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21591070","market":"us","labels":[],"media":"sec.gov","original_id":"AN9375126000463-FIBK","pdf_url":"","pub_time":1786075200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form SCHEDULE 13G - Statement of Beneficial Ownership by Certain Investors","symbol":"FIBK","title":"Form SCHEDULE 13G - Statement of Beneficial Ownership by Certain Investors","titleType":"超過5%披露","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000009375126000463/0000093751-26-000463-index.htm","us_notice_code":"Form SCHEDULE 13G","us_title_en":"Form SCHEDULE 13G - Statement of Beneficial Ownership by Certain Investors","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/93751/000009375126000463/xslSCHEDULE_13G_X02/primary_doc.xml","primary":true,"translateUrl":"","linkName":"primary_doc.html","type":"SCHEDULE 13G","id":"NTFILECkTrWGStwqQtr1mr","market":"us","size":0}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"超過5%披露","pubTime":"2026-08-07 12:00","pubTimestamp":1786075200,"title_zh":"Form SCHEDULE 13G - Statement of Beneficial Ownership by Certain Investors","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21568444","market":"us","labels":[],"media":"sec.gov","original_id":"AN86041326000084-FIBK","pdf_url":"","pub_time":1785729600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 10-Q - Quarterly report [Sections 13 or 15(d)]","symbol":"FIBK","title":"Form 10-Q - Quarterly report [Sections 13 or 15(d)]","titleType":"季度報告","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000084/0000860413-26-000084-index.htm","us_notice_code":"Form 10-Q","us_title_en":"Form 10-Q - Quarterly report [Sections 13 or 15(d)]","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"10-Q","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000084/fibk-20260630.htm","primary":true,"translateUrl":"","linkName":"fibk-20260630.htm","type":"10-Q","id":"NTFILEEHoCPhHrWSLEvYJ4","market":"us","size":3649448},{"description":"EX-10.2","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000084/fibk-20260630xex102_deferr.htm","primary":false,"translateUrl":"","linkName":"fibk-20260630xex102_deferr.htm","type":"EX-10.2","id":"NTFILEUBzdYX6yLuaBLj35","market":"us","size":489440},{"description":"EX-31.1","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000084/fibk-20260630xex311.htm","primary":false,"translateUrl":"","linkName":"fibk-20260630xex311.htm","type":"EX-31.1","id":"NTFILE3RWpNYRYKKpgHzzB","market":"us","size":10064},{"description":"EX-31.2","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000084/fibk-20260630xex312.htm","primary":false,"translateUrl":"","linkName":"fibk-20260630xex312.htm","type":"EX-31.2","id":"NTFILE3UXnmTAFnvfUpDEo","market":"us","size":10232},{"description":"EX-32","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000084/fibk-20260630xex32.htm","primary":false,"translateUrl":"","linkName":"fibk-20260630xex32.htm","type":"EX-32","id":"NTFILEFF7dASkPfAj5M3e4","market":"us","size":4042},{"description":"FIBK LOGO","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000084/image_0.jpg","primary":false,"translateUrl":"","linkName":"image_0.jpg","type":"GRAPHIC","id":"NTFILEpSHNdPWZtCZXaVXm","market":"us","size":54496}],"type_name":"財務報告","type_name_en":"Financial Report","titleTypeEn":"Quarterly Report","us_type":"usFinancials","us_type_zh":"財務報告","earn_infos":[],"event_type":"important_notice","event_name":"季度報告","pubTime":"2026-08-03 12:00","pubTimestamp":1785729600,"title_zh":"Form 10-Q - Quarterly report [Sections 13 or 15(d","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21531975","market":"us","labels":[],"media":"sec.gov","original_id":"AN86041326000081-FIBK","pdf_url":"","pub_time":1784837643000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 8-K - Current report","symbol":"FIBK","title":"Form 8-K - Current report","titleType":"重要事件披露","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/0000860413-26-000081-index.html","us_notice_code":"Form 8-K","us_title_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 7.01: Regulation FD Disclosure;\nItem 8.01: Other Events;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"EX-99.1","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/fibk-20260630x8kpr.htm","primary":true,"translateUrl":"","linkName":"fibk-20260630x8kpr.htm","type":"EX-99.1","id":"NTFILEEsReNaY228mf37QF","market":"us","size":778728},{"description":"8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/fibk-20260723.htm","primary":false,"translateUrl":"","linkName":"fibk-20260723.htm","type":"8-K","id":"NTFILE21BVuBBKvWB4nMvu","market":"us","size":33180},{"description":"EX-99.2","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip.htm","primary":false,"translateUrl":"","linkName":"jun2026ip.htm","type":"EX-99.2","id":"NTFILEBHqh56Xu1HnbX7Cz","market":"us","size":40872},{"description":"FIBK LOGO","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/fibslogo2linea04a.jpg","primary":false,"translateUrl":"","linkName":"fibslogo2linea04a.jpg","type":"GRAPHIC","id":"NTFILE4C899dkhD9SUp1J5","market":"us","size":165531},{"description":"GRAPHIC","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip001.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip001.jpg","type":"GRAPHIC","id":"NTFILE5Q2EPNybFVASDNfA","market":"us","size":127463},{"description":"GRAPHIC","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip002.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip002.jpg","type":"GRAPHIC","id":"NTFILE4wQtHztDUBYt9soP","market":"us","size":339768},{"description":"GRAPHIC","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip003.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip003.jpg","type":"GRAPHIC","id":"NTFILEBJDhytBi6rTViH9g","market":"us","size":107742},{"description":"GRAPHIC","seq":12,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip004.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip004.jpg","type":"GRAPHIC","id":"NTFILE6G2udSNgw4T2y924","market":"us","size":104713},{"description":"GRAPHIC","seq":13,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip005.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip005.jpg","type":"GRAPHIC","id":"NTFILEHhhAhW2KXYYkqeuU","market":"us","size":187441},{"description":"GRAPHIC","seq":14,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip006.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip006.jpg","type":"GRAPHIC","id":"NTFILE7d4ET3HHGvTSAdox","market":"us","size":74221},{"description":"GRAPHIC","seq":15,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip007.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip007.jpg","type":"GRAPHIC","id":"NTFILE9o3oyErS1QBvtBLb","market":"us","size":217909},{"description":"GRAPHIC","seq":16,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip008.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip008.jpg","type":"GRAPHIC","id":"NTFILE6SkT9u5KXnuedegr","market":"us","size":103791},{"description":"GRAPHIC","seq":17,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip009.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip009.jpg","type":"GRAPHIC","id":"NTFILEAUzQJqqMNLBcgid2","market":"us","size":79842},{"description":"GRAPHIC","seq":18,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip010.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip010.jpg","type":"GRAPHIC","id":"NTFILEASiQiS7kJ5qnX94n","market":"us","size":78900},{"description":"GRAPHIC","seq":19,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip011.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip011.jpg","type":"GRAPHIC","id":"NTFILEB9dtr78gBhdDXqLU","market":"us","size":113953},{"description":"GRAPHIC","seq":20,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip012.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip012.jpg","type":"GRAPHIC","id":"NTFILE6VhK443PG3AaRqcN","market":"us","size":127826},{"description":"GRAPHIC","seq":21,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip013.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip013.jpg","type":"GRAPHIC","id":"NTFILEL62ocmTFx22XExPd","market":"us","size":85219},{"description":"GRAPHIC","seq":22,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip014.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip014.jpg","type":"GRAPHIC","id":"NTFILE2oNMr5ddiBLZ8ytt","market":"us","size":99044},{"description":"GRAPHIC","seq":23,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip015.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip015.jpg","type":"GRAPHIC","id":"NTFILEJ18t4ZmGRVzncbZ4","market":"us","size":98484},{"description":"GRAPHIC","seq":24,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip016.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip016.jpg","type":"GRAPHIC","id":"NTFILEC4FABCG9VxsDTUX2","market":"us","size":92651},{"description":"GRAPHIC","seq":25,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip017.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip017.jpg","type":"GRAPHIC","id":"NTFILEByUx6NpdGVS4LEzu","market":"us","size":82567},{"description":"GRAPHIC","seq":26,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip018.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip018.jpg","type":"GRAPHIC","id":"NTFILE6gHiifa75ddHU1NS","market":"us","size":105096},{"description":"GRAPHIC","seq":27,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip019.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip019.jpg","type":"GRAPHIC","id":"NTFILEDJ1txrToKFvHEuUG","market":"us","size":260167},{"description":"GRAPHIC","seq":28,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip020.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip020.jpg","type":"GRAPHIC","id":"NTFILEG3dboAf4Drvq8XjC","market":"us","size":113419},{"description":"GRAPHIC","seq":29,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000081/jun2026ip021.jpg","primary":false,"translateUrl":"","linkName":"jun2026ip021.jpg","type":"GRAPHIC","id":"NTFILEEZARyZWMtEPprBu4","market":"us","size":111977}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"重要事件披露","pubTime":"2026-07-24 04:14","pubTimestamp":1784837643,"title_zh":"Form 8-K - Current report","summary_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 7.01: Regulation FD Disclosure;\nItem 8.01: Other Events;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"項目2.02：經營業績和財務狀況；項目7.01：法規FD披露；項目8.01：其他事件；項目9.01：財務報表和附件","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21511727","market":"us","labels":[],"media":"sec.gov","original_id":"AN195824426000458-FIBK","pdf_url":"","pub_time":1784174400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 144 - Report of proposed sale of securities","symbol":"FIBK","title":"Form 144 - Report of proposed sale of securities","titleType":"關聯方擬減持公告","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000195824426000458/0001958244-26-000458-index.htm","us_notice_code":"Form 144","us_title_en":"Form 144 - Report of proposed sale of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000195824426000458/xsl144X01/primary_doc.xml","primary":true,"translateUrl":"","linkName":"primary_doc.html","type":"144","id":"NTFILE3aW6rKFKzYrpR1zq","market":"us","size":0}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Proposed Sale Of Securities","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"關聯方擬減持公告","pubTime":"2026-07-16 12:00","pubTimestamp":1784174400,"title_zh":"Form 144 - Report of proposed sale of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21511508","market":"us","labels":[],"media":"sec.gov","original_id":"AN86041326000078-FIBK","pdf_url":"","pub_time":1784174400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 8-K - Current report","symbol":"FIBK","title":"Form 8-K - Current report","titleType":"重要事件披露","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000078/0000860413-26-000078-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"8-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000078/fibk-20260713.htm","primary":true,"translateUrl":"","linkName":"fibk-20260713.htm","type":"8-K","id":"NTFILECQo13R5xnTtdoeAA","market":"us","size":32447}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"重要事件披露","pubTime":"2026-07-16 12:00","pubTimestamp":1784174400,"title_zh":"Form 8-K - Current report","summary_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"項目5.02：董事或若干高級職員離職；選舉董事；某些官員的任命：某些官員的薪酬安排；項目9.01：財務報表和附件","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21488782","market":"us","labels":[],"media":"sec.gov","original_id":"AN86041326000075-FIBK","pdf_url":"","pub_time":1783569600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 8-K - Current report","symbol":"FIBK","title":"Form 8-K - Current report","titleType":"重要事件披露","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000075/0000860413-26-000075-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"8-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000075/fibk-20260709.htm","primary":true,"translateUrl":"","linkName":"fibk-20260709.htm","type":"8-K","id":"NTFILE8Q5au8oBazXCRA9Y","market":"us","size":30662}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"重要事件披露","pubTime":"2026-07-09 12:00","pubTimestamp":1783569600,"title_zh":"Form 8-K - Current report","summary_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"項目5.02：董事或若干高級職員離職；選舉董事；某些官員的任命：某些官員的薪酬安排；項目9.01：財務報表和附件","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21412722","market":"us","labels":[],"media":"sec.gov","original_id":"AN195004726006304-FIBK","pdf_url":"","pub_time":1781755200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 144 - Report of proposed sale of securities","symbol":"FIBK","title":"Form 144 - Report of proposed sale of securities","titleType":"關聯方擬減持公告","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000195004726006304/0001950047-26-006304-index.htm","us_notice_code":"Form 144","us_title_en":"Form 144 - Report of proposed sale of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000195004726006304/xsl144X01/primary_doc.xml","primary":true,"translateUrl":"","linkName":"primary_doc.html","type":"144","id":"NTFILE6KtvpXbdvC4fQEff","market":"us","size":0}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Proposed Sale Of Securities","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"關聯方擬減持公告","pubTime":"2026-06-18 12:00","pubTimestamp":1781755200,"title_zh":"Form 144 - Report of proposed sale of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21407684","market":"us","labels":[],"media":"sec.gov","original_id":"AN195824426000390-FIBK","pdf_url":"","pub_time":1781668800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 144 - Report of proposed sale of securities","symbol":"FIBK","title":"Form 144 - Report of proposed sale of securities","titleType":"關聯方擬減持公告","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000195824426000390/0001958244-26-000390-index.htm","us_notice_code":"Form 144","us_title_en":"Form 144 - Report of proposed sale of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000195824426000390/xsl144X01/primary_doc.xml","primary":true,"translateUrl":"","linkName":"primary_doc.html","type":"144","id":"NTFILEDKwgZEuBcBPaUBXS","market":"us","size":0}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Proposed Sale Of Securities","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"關聯方擬減持公告","pubTime":"2026-06-17 12:00","pubTimestamp":1781668800,"title_zh":"Form 144 - Report of proposed sale of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21330577","market":"us","labels":[],"media":"sec.gov","original_id":"AN86041326000048-FIBK","pdf_url":"","pub_time":1780027200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 8-K - Current report","symbol":"FIBK","title":"Form 8-K - Current report","titleType":"重要事件披露","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000048/0000860413-26-000048-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 5.03: Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year;\nItem 5.07: Submission of Matters to a Vote of Security Holders;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"EX-3.1","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000048/fibk-20260529xex31_certxof.htm","primary":true,"translateUrl":"","linkName":"fibk-20260529xex31_certxof.htm","type":"EX-3.1","id":"NTFILEi4pfzrcWZmKVh7nY","market":"us","size":9039},{"description":"8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000048/fibk-20260527.htm","primary":false,"translateUrl":"","linkName":"fibk-20260527.htm","type":"8-K","id":"NTFILE9AQgUFEWritkLgzG","market":"us","size":51622}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"重要事件披露","pubTime":"2026-05-29 12:00","pubTimestamp":1780027200,"title_zh":"Form 8-K - Current report","summary_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 5.03: Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year;\nItem 5.07: Submission of Matters to a Vote of Security Holders;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"第5.02項：董事或某些高級職員的離職；選舉董事；若干人員的委任：若干人員的補償安排；第5.03項：公司章程或章程的修訂；財政年度的變化；項目5.07：將事項提交證券持有人表決；項目9.01：財務報表和附件","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21265893","market":"us","labels":[],"media":"sec.gov","original_id":"AN90221926000149-FIBK","pdf_url":"","pub_time":1778817600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form SCHEDULE 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]","symbol":"FIBK","title":"Form SCHEDULE 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]","titleType":"超過5%披露","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000090221926000149/0000902219-26-000149-index.htm","us_notice_code":"Form SCHEDULE 13G/A","us_title_en":"Form SCHEDULE 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000090221926000149/xslSCHEDULE_13G_X02/primary_doc.xml","primary":true,"translateUrl":"","linkName":"primary_doc.html","type":"SCHEDULE 13G/A","id":"NTFILE7XrAnghgL8Ja2uBR","market":"us","size":0},{"description":"JOINT FILING AGREEMENT","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000090221926000149/Rule13D_JointFilingAgreement.htm","primary":false,"translateUrl":"","linkName":"Rule13D_JointFilingAgreement.htm","type":"EX-99","id":"NTFILEHyuVVWZ82HkK14Z3","market":"us","size":3765}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"超過5%披露","pubTime":"2026-05-15 12:00","pubTimestamp":1778817600,"title_zh":"Form SCHEDULE 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21254320","market":"us","labels":[],"media":"sec.gov","original_id":"AN86041326000041-FIBK","pdf_url":"","pub_time":1778644800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 8-K - Current report","symbol":"FIBK","title":"Form 8-K - Current report","titleType":"重要事件披露","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000041/0000860413-26-000041-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"EX-10.1","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000041/fibk-20260511xex101xtransi.htm","primary":true,"translateUrl":"","linkName":"fibk-20260511xex101xtransi.htm","type":"EX-10.1","id":"NTFILE6nAggURtcqziAKMQ","market":"us","size":81573},{"description":"8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000041/fibk-20260511.htm","primary":false,"translateUrl":"","linkName":"fibk-20260511.htm","type":"8-K","id":"NTFILE7anCnLEJYimuaxCj","market":"us","size":33858}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"重要事件披露","pubTime":"2026-05-13 12:00","pubTimestamp":1778644800,"title_zh":"Form 8-K - Current report","summary_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"第5.02項：董事或某些高級職員的離職；選舉董事；若干人員的委任：若干人員的補償安排；項目9.01：財務報表和附件","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21228062","market":"us","labels":[],"media":"sec.gov","original_id":"AN86041326000038-FIBK","pdf_url":"","pub_time":1778184609000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 10-Q - Quarterly report [Sections 13 or 15(d)]","symbol":"FIBK","title":"Form 10-Q - Quarterly report [Sections 13 or 15(d)]","titleType":"季度報告","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/860413/0000860413-26-000038-index.html","us_notice_code":"Form 10-Q","us_title_en":"Form 10-Q - Quarterly report [Sections 13 or 15(d)]","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"10-Q","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000038/fibk-20260331.htm","primary":true,"translateUrl":"","linkName":"fibk-20260331.htm","type":"10-Q","id":"NTFILEGWbRV12mEgjiaGo1","market":"us","size":3110362},{"description":"EX-31.1","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000038/fibk-20260331xex311.htm","primary":false,"translateUrl":"","linkName":"fibk-20260331xex311.htm","type":"EX-31.1","id":"NTFILE9inUrUBXBQtMyG9o","market":"us","size":10055},{"description":"EX-31.2","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000038/fibk-20260331xex312.htm","primary":false,"translateUrl":"","linkName":"fibk-20260331xex312.htm","type":"EX-31.2","id":"NTFILE2EH3n6P3fQCCpMrL","market":"us","size":10223},{"description":"EX-32","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000038/fibk-20260331xex32.htm","primary":false,"translateUrl":"","linkName":"fibk-20260331xex32.htm","type":"EX-32","id":"NTFILED6eVWDYWp2ottASZ","market":"us","size":4028}],"type_name":"財務報告","type_name_en":"Financial Report","titleTypeEn":"Quarterly Report","us_type":"usFinancials","us_type_zh":"財務報告","earn_infos":[],"event_type":"important_notice","event_name":"季度報告","pubTime":"2026-05-08 04:10","pubTimestamp":1778184609,"title_zh":"Form 10-Q - Quarterly report [Sections 13 or 15(d","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21199694","market":"us","labels":[],"media":"sec.gov","original_id":"AN195824426000242-FIBK","pdf_url":"","pub_time":1777521600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 144 - Report of proposed sale of securities","symbol":"FIBK","title":"Form 144 - Report of proposed sale of securities","titleType":"關聯方擬減持公告","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000195824426000242/0001958244-26-000242-index.htm","us_notice_code":"Form 144","us_title_en":"Form 144 - Report of proposed sale of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000195824426000242/xsl144X01/primary_doc.xml","primary":true,"translateUrl":"","linkName":"primary_doc.html","type":"144","id":"NTFILE4FCT56NnJmSW5CXc","market":"us","size":0}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Proposed Sale Of Securities","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"關聯方擬減持公告","pubTime":"2026-04-30 12:00","pubTimestamp":1777521600,"title_zh":"Form 144 - Report of proposed sale of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21192175","market":"us","labels":[],"media":"sec.gov","original_id":"AN86041326000034-FIBK","pdf_url":"","pub_time":1777493533000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 8-K - Current report","symbol":"FIBK","title":"Form 8-K - Current report","titleType":"重要事件披露","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/0000860413-26-000034-index.html","us_notice_code":"Form 8-K","us_title_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 7.01: Regulation FD Disclosure;\nItem 8.01: Other Events;\nItem 9.01: Financial Statements and Exhibits","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"EX-99.1","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/fibk-20260331x8kpr.htm","primary":true,"translateUrl":"","linkName":"fibk-20260331x8kpr.htm","type":"EX-99.1","id":"NTFILEEpLrK6UgtwkCDxfr","market":"us","size":772846},{"description":"8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/fibk-20260429.htm","primary":false,"translateUrl":"","linkName":"fibk-20260429.htm","type":"8-K","id":"NTFILE9WUnmEdHkxcQzMjf","market":"us","size":32445},{"description":"EX-99.2","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip.htm","primary":false,"translateUrl":"","linkName":"mar2026ip.htm","type":"EX-99.2","id":"NTFILEHryDTnkPCkpHqiha","market":"us","size":39900},{"description":"FIBK LOGO","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/fibslogo2linea04a.jpg","primary":false,"translateUrl":"","linkName":"fibslogo2linea04a.jpg","type":"GRAPHIC","id":"NTFILEELDjUDGNLtUsMm2M","market":"us","size":165531},{"description":"GRAPHIC","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip001.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip001.jpg","type":"GRAPHIC","id":"NTFILEG9s5QU9DBvTxFzAm","market":"us","size":138744},{"description":"GRAPHIC","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip002.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip002.jpg","type":"GRAPHIC","id":"NTFILE3uAiezdkQjztKrEu","market":"us","size":283965},{"description":"GRAPHIC","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip003.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip003.jpg","type":"GRAPHIC","id":"NTFILE8vR2vKTg82UEPcZa","market":"us","size":111078},{"description":"GRAPHIC","seq":12,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip004.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip004.jpg","type":"GRAPHIC","id":"NTFILEHhGNu1Kah1iHUpsS","market":"us","size":94683},{"description":"GRAPHIC","seq":13,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip005.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip005.jpg","type":"GRAPHIC","id":"NTFILEBSYnkat2G5qz8aiL","market":"us","size":168400},{"description":"GRAPHIC","seq":14,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip006.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip006.jpg","type":"GRAPHIC","id":"NTFILEBEJiwy9B6wAJZtqf","market":"us","size":226672},{"description":"GRAPHIC","seq":15,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip007.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip007.jpg","type":"GRAPHIC","id":"NTFILEEyviywYuE1YDxRhk","market":"us","size":106708},{"description":"GRAPHIC","seq":16,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip008.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip008.jpg","type":"GRAPHIC","id":"NTFILE4ftCgNHrjMUtrr5B","market":"us","size":87096},{"description":"GRAPHIC","seq":17,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip009.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip009.jpg","type":"GRAPHIC","id":"NTFILEAwj1byorguBpazpx","market":"us","size":81591},{"description":"GRAPHIC","seq":18,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip010.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip010.jpg","type":"GRAPHIC","id":"NTFILE9jUYwvNExc2Svob2","market":"us","size":110425},{"description":"GRAPHIC","seq":19,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip011.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip011.jpg","type":"GRAPHIC","id":"NTFILEABicaTPesTFpTDEi","market":"us","size":135097},{"description":"GRAPHIC","seq":20,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip012.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip012.jpg","type":"GRAPHIC","id":"NTFILEBZgFSsneE9941niv","market":"us","size":78601},{"description":"GRAPHIC","seq":21,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip013.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip013.jpg","type":"GRAPHIC","id":"NTFILEEwMD3wRCueAP8Qjz","market":"us","size":102727},{"description":"GRAPHIC","seq":22,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip014.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip014.jpg","type":"GRAPHIC","id":"NTFILEprMmhFX5YHSFGMBa","market":"us","size":98896},{"description":"GRAPHIC","seq":23,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip015.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip015.jpg","type":"GRAPHIC","id":"NTFILEPpfVFnyz54fpVUEG","market":"us","size":82134},{"description":"GRAPHIC","seq":24,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip016.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip016.jpg","type":"GRAPHIC","id":"NTFILEEZTLhFTAaYPAnAmZ","market":"us","size":96531},{"description":"GRAPHIC","seq":25,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip017.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip017.jpg","type":"GRAPHIC","id":"NTFILEH6vUYYyPwnU3K9bB","market":"us","size":100670},{"description":"GRAPHIC","seq":26,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip018.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip018.jpg","type":"GRAPHIC","id":"NTFILEGFaPL4SEEjYymNKG","market":"us","size":277594},{"description":"GRAPHIC","seq":27,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip019.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip019.jpg","type":"GRAPHIC","id":"NTFILEpzygXjq7eRUj4hFu","market":"us","size":112525},{"description":"GRAPHIC","seq":28,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000034/mar2026ip020.jpg","primary":false,"translateUrl":"","linkName":"mar2026ip020.jpg","type":"GRAPHIC","id":"NTFILEGFAdjYTipxQP6pMf","market":"us","size":111843}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"重要事件披露","pubTime":"2026-04-30 04:12","pubTimestamp":1777493533,"title_zh":"Form 8-K - Current report","summary_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 7.01: Regulation FD Disclosure;\nItem 8.01: Other Events;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"第2.02項：經營業績和財務狀況；第7.01項：法規FD披露；項目8.01：其他事件；項目9.01：財務報表和附件","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"21188996","market":"us","labels":[],"media":"sec.gov","original_id":"AN210012126000410-FIBK","pdf_url":"","pub_time":1777435200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form SCHEDULE 13G - Statement of Beneficial Ownership by Certain Investors","symbol":"FIBK","title":"Form SCHEDULE 13G - Statement of Beneficial Ownership by Certain Investors","titleType":"超過5%披露","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000210012126000410/0002100121-26-000410-index.htm","us_notice_code":"Form SCHEDULE 13G","us_title_en":"Form SCHEDULE 13G - Statement of Beneficial Ownership by Certain Investors","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000210012126000410/xslSCHEDULE_13G_X02/primary_doc.xml","primary":true,"translateUrl":"","linkName":"primary_doc.html","type":"SCHEDULE 13G","id":"NTFILE4mwtytH8Sqbr4RUC","market":"us","size":0}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"超過5%披露","pubTime":"2026-04-29 12:00","pubTimestamp":1777435200,"title_zh":"Form SCHEDULE 13G - Statement of Beneficial Ownership by Certain Investors","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"20778224","market":"us","labels":[],"media":"sec.gov","original_id":"AN86041326000011-FIBK","pdf_url":"","pub_time":1772082000000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]","symbol":"FIBK","title":"Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]","titleType":"年度報告","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/0000860413-26-000011-index.htm","us_notice_code":"Form 10-K","us_title_en":"Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405]","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"10-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231.htm","primary":true,"translateUrl":"","linkName":"fibk-20251231.htm","type":"10-K","id":"NTFILE13FZrWxA9TX7xbKM","market":"us","size":5202929},{"description":"EX-10.14","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231xex1014_rsuag.htm","primary":false,"translateUrl":"","linkName":"fibk-20251231xex1014_rsuag.htm","type":"EX-10.14","id":"NTFILE5CCL47wCYs1eGo47","market":"us","size":75928},{"description":"EX-10.15","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231xex1015_prsut.htm","primary":false,"translateUrl":"","linkName":"fibk-20251231xex1015_prsut.htm","type":"EX-10.15","id":"NTFILEE8TNJ8a9q57Sqjv2","market":"us","size":97320},{"description":"EX-10.16","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231xex1016_prsur.htm","primary":false,"translateUrl":"","linkName":"fibk-20251231xex1016_prsur.htm","type":"EX-10.16","id":"NTFILEG3Zwy3dCkckAGd8F","market":"us","size":97298},{"description":"EX-10.17","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231xex1017_direc.htm","primary":false,"translateUrl":"","linkName":"fibk-20251231xex1017_direc.htm","type":"EX-10.17","id":"NTFILEFjP6YTtkDNKnrZyn","market":"us","size":11430},{"description":"EX-10.24","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231xex1024_emplo.htm","primary":false,"translateUrl":"","linkName":"fibk-20251231xex1024_emplo.htm","type":"EX-10.24","id":"NTFILEG2G7QiAwoATwVwUK","market":"us","size":120624},{"description":"EX-19.1","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231xex191_inside.htm","primary":false,"translateUrl":"","linkName":"fibk-20251231xex191_inside.htm","type":"EX-19.1","id":"NTFILE37svvjMcnFaWQkcL","market":"us","size":143913},{"description":"EX-21.1","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231xex211_subsid.htm","primary":false,"translateUrl":"","linkName":"fibk-20251231xex211_subsid.htm","type":"EX-21.1","id":"NTFILEHwzEsQPdsGuTTJgp","market":"us","size":13420},{"description":"EX-23.1","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231xex231_consen.htm","primary":false,"translateUrl":"","linkName":"fibk-20251231xex231_consen.htm","type":"EX-23.1","id":"NTFILE7xZZpkLr2B8NPfQ1","market":"us","size":4853},{"description":"EX-23.2","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231xex232_consen.htm","primary":false,"translateUrl":"","linkName":"fibk-20251231xex232_consen.htm","type":"EX-23.2","id":"NTFILEBNmS1QaKgi5QCimm","market":"us","size":3186},{"description":"EX-31.1","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231xex311_certxc.htm","primary":false,"translateUrl":"","linkName":"fibk-20251231xex311_certxc.htm","type":"EX-31.1","id":"NTFILEB9Xkb9YyBy8rkhjr","market":"us","size":9844},{"description":"EX-31.2","seq":12,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231xex312_certxc.htm","primary":false,"translateUrl":"","linkName":"fibk-20251231xex312_certxc.htm","type":"EX-31.2","id":"NTFILEETY1FrhJkkp4Gazr","market":"us","size":9826},{"description":"EX-32","seq":13,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231xex32_section.htm","primary":false,"translateUrl":"","linkName":"fibk-20251231xex32_section.htm","type":"EX-32","id":"NTFILE8vDSRf5PwcxhTTkg","market":"us","size":6353},{"description":"GRAPHIC","seq":19,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/fibk-20251231_g1.jpg","primary":false,"translateUrl":"","linkName":"fibk-20251231_g1.jpg","type":"GRAPHIC","id":"NTFILEBgdofzt6h26vdPWr","market":"us","size":140994},{"description":"FIBK LOGO","seq":20,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000086041326000011/image_0.jpg","primary":false,"translateUrl":"","linkName":"image_0.jpg","type":"GRAPHIC","id":"NTFILE2fv2YJ8PaxTcvhsU","market":"us","size":54496}],"type_name":"財務報告","type_name_en":"Financial Report","titleTypeEn":"Annual Report","us_type":"usFinancials","us_type_zh":"財務報告","earn_infos":[],"event_type":"important_notice","event_name":"年度報告","pubTime":"2026-02-26 13:00","pubTimestamp":1772082000,"title_zh":"Form 10-K - Annual report [Section 13 and 15(d), not S-K Item 405","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"20725301","market":"us","labels":[],"media":"sec.gov","original_id":"AN195917326000865-FIBK","pdf_url":"","pub_time":1770786000000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Form 144 - Report of proposed sale of securities","symbol":"FIBK","title":"Form 144 - Report of proposed sale of securities","titleType":"關聯方擬減持公告","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/860413/000195917326000865/0001959173-26-000865-index.htm","us_notice_code":"Form 144","us_title_en":"Form 144 - Report of proposed sale of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/860413/000195917326000865/xsl144X01/primary_doc.xml","primary":true,"translateUrl":"","linkName":"primary_doc.html","type":"144","id":"NTFILE3RosHzJzhVvEuxmr","market":"us","size":0}],"type_name":"交易披露","type_name_en":"Transaction Related","titleTypeEn":"Proposed Sale Of Securities","us_type":"usAnnouncement","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"關聯方擬減持公告","pubTime":"2026-02-11 13:00","pubTimestamp":1770786000,"title_zh":"Form 144 - Report of proposed sale of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0}],"pageSize":20,"totalPage":19,"pageCount":1,"totalSize":378,"code":"91000000","status":"200"}]}}