$INBK
First Internet Bancorp Stock $inbk

$inbk Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-Q Financial Statement

#000156246321000090 Filed on November 09, 2021

Income Statement

Concept	2021 Q4	2021 Q3	2021 Q2
Revenue		$33.03M	$33.38M
YoY Change		0.87%	-2.47%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$2.130M	$2.610M	$3.760M
YoY Change	0.0%	19.72%	100.0%
% of Gross Profit
Operating Expenses
YoY Change
Operating Profit
YoY Change
Interest Expense		$12.12M	$11.77M
YoY Change		-26.66%	-40.54%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$14.48M	$14.31M	$15.47M
YoY Change	2.37%	45.93%	322.3%
Income Tax	$2.000M	$2.220M	$2.377M
% Of Pretax Income	13.81%	15.51%	15.36%
Net Earnings	$12.48M	$12.09M	$13.10M
YoY Change	12.53%	43.74%	233.06%
Net Earnings / Revenue		36.6%	39.24%
Basic Earnings Per Share		$1.22	$1.32
Diluted Earnings Per Share	$1.251M	$1.21	$1.31
COMMON SHARES
Basic Shares Outstanding	9.854M shares	9.936B shares	9.933B shares
Diluted Shares Outstanding		9.988B shares	9.981B shares

Balance Sheet

Concept	2021 Q4	2021 Q3	2021 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$443.0M	$407.5M	$328.8M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$59.84M	$52.70M	$44.25M
YoY Change	59.2%	68.58%	84.84%
Goodwill	$4.700M	$4.700M	$4.700M
YoY Change	0.0%	0.0%	0.0%
Intangibles
YoY Change
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$4.211B	$4.252B	$4.205B
YoY Change	-0.83%	-1.88%	-2.77%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$2.000M	$1.600M	$1.100M
YoY Change	42.86%	33.33%	0.0%
Accrued Expenses	$30.50M	$36.60M	$53.90M
YoY Change	-36.98%	-36.01%	6.94%
Deferred Revenue
YoY Change
Short-Term Debt
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$32.50M	$38.20M	$55.00M
YoY Change	-34.74%	-34.59%	6.8%
LONG-TERM LIABILITIES
Long-Term Debt	$104.2M	$104.2M	$69.90M
YoY Change	30.9%	49.28%	0.29%
Other Long-Term Liabilities
YoY Change
Total Long-Term Liabilities	$104.2M	$104.2M	$69.90M
YoY Change	30.9%	49.28%	0.29%
TOTAL LIABILITIES
Total Short-Term Liabilities	$32.50M	$38.20M	$55.00M
Total Long-Term Liabilities	$104.2M	$104.2M	$69.90M
Total Liabilities	$3.831B	$3.882B	$3.846B
YoY Change	-2.16%	-3.33%	-4.25%
SHAREHOLDERS EQUITY
Retained Earnings	$172.4M	$160.6M	$149.1M
YoY Change	36.06%	38.12%	37.48%
Common Stock
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$380.3M	$370.4M	$358.6M
YoY Change
Total Liabilities & Shareholders Equity	$4.211B	$4.252B	$4.205B
YoY Change	-0.83%	-1.88%	-2.77%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2021 Q2
OPERATING ACTIVITIES
Net Income	$12.48M	$12.09M	$13.10M
YoY Change	12.53%	43.74%	233.06%
Depreciation, Depletion And Amortization	$2.130M	$2.610M	$3.760M
YoY Change	0.0%	19.72%	100.0%
Cash From Operating Activities	$11.90M	$1.450M	$10.36M
YoY Change	-75.25%	-106.97%	-10.92%
INVESTING ACTIVITIES
Capital Expenditures	-$7.420M	-$8.760M	-$8.010M
YoY Change	6.15%	9.64%	40.03%
Acquisitions
YoY Change
Other Investing Activities	$81.91M	$34.52M	-$77.70M
YoY Change	-571.56%	24.98%	29.01%
Cash From Investing Activities	$74.48M	$25.76M	-$85.71M
YoY Change	-405.75%	31.23%	29.94%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-50.93M	51.50M	-12.05M
YoY Change	-44.86%	-672.86%	-105.97%
NET CHANGE
Cash From Operating Activities	11.90M	1.450M	10.36M
Cash From Investing Activities	74.48M	25.76M	-85.71M
Cash From Financing Activities	-50.93M	51.50M	-12.05M
Net Change In Cash	35.45M	78.71M	-87.40M
YoY Change	-151.65%	-873.94%	-159.31%
FREE CASH FLOW
Cash From Operating Activities	$11.90M	$1.450M	$10.36M
Capital Expenditures	-$7.420M	-$8.760M	-$8.010M
Free Cash Flow	$19.32M	$10.21M	$18.37M
YoY Change	-64.92%	-179.64%	5.88%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
	dei	Entity Central Index Key EntityCentralIndexKey	0001562463
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Amendment Flag AmendmentFlag	false
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
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CY2021Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	64337000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	69452000	USD
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CY2020Q4	us-gaap	Loans Held For Sale Fair Value Disclosure LoansHeldForSaleFairValueDisclosure	26341000	USD
CY2021Q3	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	2844000	USD
CY2020Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	2397000	USD
CY2021Q3	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0
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CY2021Q3	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2021Q3	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2020Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2021-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-35750
	dei	Entity Registrant Name EntityRegistrantName	First Internet Bancorp
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	IN
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	20-3489991
	dei	Entity Address Address Line1 EntityAddressAddressLine1	11201 USA Parkway
	dei	Entity Address City Or Town EntityAddressCityOrTown	Fishers
	dei	Entity Address State Or Province EntityAddressStateOrProvince	IN
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	46037
	dei	City Area Code CityAreaCode	317
	dei	Local Phone Number LocalPhoneNumber	532-7900
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
	dei	Entity Small Business EntitySmallBusiness	true
	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
	dei	Entity Shell Company EntityShellCompany	false
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	inbk	Write Down Of Other Real Estate Owned WriteDownOfOtherRealEstateOwned	2065000	USD
CY2021Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	914000	USD
CY2020Q3	us-gaap	Other Noninterest Expense OtherNoninterestExpense	970000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3159000	USD
	us-gaap	Other Noninterest Expense OtherNoninterestExpense	3383000	USD
CY2021Q3	us-gaap	Noninterest Expense NoninterestExpense	14451000	USD
CY2020Q3	us-gaap	Noninterest Expense NoninterestExpense	16412000	USD
	us-gaap	Noninterest Expense NoninterestExpense	44843000	USD
	us-gaap	Noninterest Expense NoninterestExpense	43142000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	14310000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	9806000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	42090000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	19752000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	2220000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1395000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	6454000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1390000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	12090000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	8411000	USD
	us-gaap	Net Income Loss NetIncomeLoss	35636000	USD
	us-gaap	Net Income Loss NetIncomeLoss	18362000	USD
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.22
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.86
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.59
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.87
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.21
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.86
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.57
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.87
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9936237000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9773175	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9922877000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9825683	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9988102000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9773224	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9974071000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9827182	shares
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.06
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.06
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.18
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.18
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	12090000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	8411000	USD
	us-gaap	Net Income Loss NetIncomeLoss	35636000	USD
	us-gaap	Net Income Loss NetIncomeLoss	18362000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	-1789000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	1386000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	-2596000	USD
	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeReclassificationAdjustmentsAndTax	6187000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	98000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	139000	USD
CY2021Q3	inbk	Other Comprehensive Income Loss Availableforsale Securities Net Unrealized Holding Gains Losses Other Than Temporary Impairments Recognizedin Income OtherComprehensiveIncomeLossAvailableforsaleSecuritiesNetUnrealizedHoldingGainsLossesOtherThanTemporaryImpairmentsRecognizedinIncome	1439000	USD
CY2020Q3	inbk	Other Comprehensive Income Loss Availableforsale Securities Net Unrealized Holding Gains Losses Other Than Temporary Impairments Recognizedin Income OtherComprehensiveIncomeLossAvailableforsaleSecuritiesNetUnrealizedHoldingGainsLossesOtherThanTemporaryImpairmentsRecognizedinIncome	1514000	USD
	inbk	Other Comprehensive Income Loss Availableforsale Securities Net Unrealized Holding Gains Losses Other Than Temporary Impairments Recognizedin Income OtherComprehensiveIncomeLossAvailableforsaleSecuritiesNetUnrealizedHoldingGainsLossesOtherThanTemporaryImpairmentsRecognizedinIncome	7665000	USD
	inbk	Other Comprehensive Income Loss Availableforsale Securities Net Unrealized Holding Gains Losses Other Than Temporary Impairments Recognizedin Income OtherComprehensiveIncomeLossAvailableforsaleSecuritiesNetUnrealizedHoldingGainsLossesOtherThanTemporaryImpairmentsRecognizedinIncome	-12453000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-350000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	2802000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	5069000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-6405000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-93000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	754000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	1041000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-1506000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-257000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2048000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	4028000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4899000	USD
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	11833000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	10459000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	39664000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	13463000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	330944000	USD
	us-gaap	Net Income Loss NetIncomeLoss	35636000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	4028000	USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.18
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1817000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1830000	USD
	us-gaap	Stock Issued During Period Value Stock Dividend StockIssuedDuringPeriodValueStockDividend	16000	USD
	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	195000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	370442000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	304913000	USD
	us-gaap	Net Income Loss NetIncomeLoss	18362000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4899000	USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.18
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	1802000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	1600000	USD
	us-gaap	Stock Issued During Period Value Stock Dividend StockIssuedDuringPeriodValueStockDividend	21000	USD
	us-gaap	Adjustments Related To Tax Withholding For Share Based Compensation AdjustmentsRelatedToTaxWithholdingForShareBasedCompensation	93000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	318102000	USD
CY2021Q2	us-gaap	Stockholders Equity StockholdersEquity	358641000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	12090000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-257000	USD
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.06
CY2021Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	605000	USD
CY2021Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	568000	USD
CY2021Q3	us-gaap	Stock Issued During Period Value Stock Dividend StockIssuedDuringPeriodValueStockDividend	5000	USD
CY2021Q3	us-gaap	Stockholders Equity StockholdersEquity	370442000	USD
CY2020Q2	us-gaap	Stockholders Equity StockholdersEquity	307711000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	8411000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2048000	USD
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.06
CY2020Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	601000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	527000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Stock Dividend StockIssuedDuringPeriodValueStockDividend	6000	USD
CY2020Q3	us-gaap	Stockholders Equity StockholdersEquity	318102000	USD
	us-gaap	Net Income Loss NetIncomeLoss	35636000	USD
	us-gaap	Net Income Loss NetIncomeLoss	18362000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	6649000	USD
	us-gaap	Depreciation Depletion And Amortization DepreciationDepletionAndAmortization	5699000	USD
	inbk	Increase Decrease In Cash Surrender Value Of Life Insurance IncreaseDecreaseInCashSurrenderValueOfLifeInsurance	-708000	USD
	inbk	Increase Decrease In Cash Surrender Value Of Life Insurance IncreaseDecreaseInCashSurrenderValueOfLifeInsurance	-712000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	1268000	USD
	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	6461000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	1830000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	1600000	USD
	inbk	Write Down Of Other Real Estate Owned WriteDownOfOtherRealEstateOwned	0	USD
	inbk	Write Down Of Other Real Estate Owned WriteDownOfOtherRealEstateOwned	2065000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	139000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	645620000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	431384000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	662390000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Sale ProceedsFromSaleOfLoansHeldForSale	429284000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	23522000	USD
	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	19544000	USD
	inbk	Unrealized Gain Loss On Loans Held For Sale UnrealizedGainLossOnLoansHeldForSale	-854000	USD
	inbk	Unrealized Gain Loss On Loans Held For Sale UnrealizedGainLossOnLoansHeldForSale	-116000	USD
	inbk	Gain Loss On Derivatives GainLossOnDerivatives	-1870000	USD
	inbk	Gain Loss On Derivatives GainLossOnDerivatives	1974000	USD
	inbk	Settlement Of Derivative SettlementOfDerivative	1859000	USD
	inbk	Settlement Of Derivative SettlementOfDerivative	46109000	USD
	inbk	Increase Decrease In Servicing Assets IncreaseDecreaseInServicingAssets	-669000	USD
	inbk	Increase Decrease In Servicing Assets IncreaseDecreaseInServicingAssets	337000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-3114000	USD
	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-491000	USD
	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	372000	USD
	us-gaap	Increase Decrease In Accrued Liabilities And Other Operating Liabilities IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities	1098000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	42943000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-35023000	USD
	inbk	Payments For Proceeds Loans And Leases Excluding Purchases PaymentsForProceedsLoansAndLeasesExcludingPurchases	-156670000	USD
	inbk	Payments For Proceeds Loans And Leases Excluding Purchases PaymentsForProceedsLoansAndLeasesExcludingPurchases	-2284000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	129183000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	142432000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	893000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	272845000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	119263000	USD
	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	6000000	USD
	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	0	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	0	USD
	us-gaap	Payments To Acquire Held To Maturity Securities PaymentsToAcquireHeldToMaturitySecurities	2000000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	8116000	USD
	us-gaap	Proceeds From Sale Of Property Plant And Equipment ProceedsFromSaleOfPropertyPlantAndEquipment	0	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	22467000	USD
	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	18571000	USD
	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	37527000	USD
	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	260841000	USD
	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	0	USD
	us-gaap	Proceeds From Sale Of Loans Held For Investment ProceedsFromSaleOfLoansHeldForInvestment	234619000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-2264000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-30606000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-20447000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-46290000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	218428000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	1802000	USD
	us-gaap	Payments Of Dividends PaymentsOfDividends	1773000	USD
	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	35000000	USD
	us-gaap	Repayments Of Subordinated Debt RepaymentsOfSubordinatedDebt	0	USD
	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	58658000	USD
	us-gaap	Proceeds From Issuance Of Subordinated Long Term Debt ProceedsFromIssuanceOfSubordinatedLongTermDebt	0	USD
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	110000000	USD
	us-gaap	Proceeds From Federal Home Loan Bank Borrowings ProceedsFromFederalHomeLoanBankBorrowings	330000000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	110000000	USD
	us-gaap	Repayments Of Federal Home Loan Bank Borrowings RepaymentsOfFederalHomeLoanBankBorrowings	330000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-194000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-93000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-24628000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	216562000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-12291000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	161092000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	419806000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	327361000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	407515000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	488453000	USD
	us-gaap	Interest Paid Net InterestPaidNet	36511000	USD
	us-gaap	Interest Paid Net InterestPaidNet	60058000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	4995000	USD
	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	2516000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	1188000	USD
	us-gaap	Transfer To Other Real Estate TransferToOtherRealEstate	0	USD
	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	0	USD
	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	185797000	USD
	inbk	Cash Dividends Declared Not Paid CashDividendsDeclaredNotPaid	591000	USD
	inbk	Cash Dividends Declared Not Paid CashDividendsDeclaredNotPaid	588000	USD
	inbk	Securities Purchased During Period Settled In Subsequent Period SecuritiesPurchasedDuringPeriodSettledInSubsequentPeriod	0	USD
	inbk	Securities Purchased During Period Settled In Subsequent Period SecuritiesPurchasedDuringPeriodSettledInSubsequentPeriod	5547000	USD
	inbk	Transfer Of Equity Investments From Available For Sale To Other Assets TransferOfEquityInvestmentsFromAvailableForSaleToOtherAssets	0	USD
	inbk	Transfer Of Equity Investments From Available For Sale To Other Assets TransferOfEquityInvestmentsFromAvailableForSaleToOtherAssets	4479000	USD
CY2021Q3	inbk	Number Of Wholly Owned Subsidiaries NumberOfWhollyOwnedSubsidiaries	3	subsidiary
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	12090000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	8411000	USD
	us-gaap	Net Income Loss NetIncomeLoss	35636000	USD
	us-gaap	Net Income Loss NetIncomeLoss	18362000	USD
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9936237000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9773175	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9922877000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9825683	shares
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.22
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.86
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.59
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.87
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	12090000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	8411000	USD
	us-gaap	Net Income Loss NetIncomeLoss	35636000	USD
	us-gaap	Net Income Loss NetIncomeLoss	18362000	USD
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9936237000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9773175	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9922877000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	9825683	shares
CY2021Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	51865000	shares
CY2020Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	49	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	51194000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1499	shares
CY2021Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	9988102000	shares
CY2020Q3	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	9773224	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	9974071000	shares
	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	9827182	shares
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.21
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.86
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.57
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.87
CY2021Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	28	shares
CY2020Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	55309	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	38212	shares
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	635978000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	4892000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	6863000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	634007000	USD
CY2021Q3	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	62129000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	2208000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	0	USD
CY2021Q3	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	64337000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	497004000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	7107000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	6483000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	497628000	USD
CY2020Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	68223000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	1356000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	127000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	69452000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsAmortizedCostBasis	0	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Next Rolling Twelve Months Fair Value AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue	0	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCostBasis	34855000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Two Through Five Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	32935000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCostBasis	64591000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling Year Six Through Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	64429000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenAmortizedCostBasis	78922000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Rolling After Year Ten Fair Value AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue	81518000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	178368000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Maturities Single Maturity Date AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate	178882000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	635978000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	634007000	USD
CY2021Q3	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Two Through Five Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveAmortizedCost	5793000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Two Through Five Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue	5976000	USD
CY2021Q3	us-gaap	Heldtomaturity Securities Debt Maturities Rolling Year Six Through Ten Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenAmortizedCost	44655000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities Rolling Year Six Through Ten Fair Value HeldToMaturitySecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue	46320000	USD
CY2021Q3	us-gaap	Heldtomaturity Securities Debt Maturities Rolling After Ten Years Amortized Cost HeldtomaturitySecuritiesDebtMaturitiesRollingAfterTenYearsAmortizedCost	11681000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities After Ten Years Fair Value HeldToMaturitySecuritiesDebtMaturitiesAfterTenYearsFairValue	12041000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Amortized Cost Basis HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis	62129000	USD
CY2021Q3	us-gaap	Held To Maturity Securities Debt Maturities Single Maturity Date Fair Value HeldToMaturitySecuritiesDebtMaturitiesSingleMaturityDateFairValue	64337000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	100000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	100000	USD
CY2021Q3	inbk	Securities Continuous Unrealized Loss Position Fair Value SecuritiesContinuousUnrealizedLossPositionFairValue	462400000	USD
CY2020Q4	inbk	Securities Continuous Unrealized Loss Position Fair Value SecuritiesContinuousUnrealizedLossPositionFairValue	226500000	USD
	inbk	Available For Sale Securities Continuous Unrealized Loss Position Fair Value In Percentage AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueInPercentage	0.66
	inbk	Available For Sale Securities Continuous Unrealized Loss Position Fair Value In Percentage AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueInPercentage	0.40
CY2021Q3	inbk	Debt Securities Number Of Securities In Portfolio DebtSecuritiesNumberOfSecuritiesInPortfolio	441	security
CY2021Q3	inbk	Debt Securities Unrealized Loss Position Number Of Positions DebtSecuritiesUnrealizedLossPositionNumberOfPositions	167	security
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	390392000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	4320000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	72404000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	2543000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	462796000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	6863000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	58995000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	391000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	147092000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	6092000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	206087000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	6483000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	17456000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	126000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	2999000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	1000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	20455000	USD
CY2020Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	127000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	0	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	98000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain Loss DebtSecuritiesAvailableForSaleRealizedGainLoss	139000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	98000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	139000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	26000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	38000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	0	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	72000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	101000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2880597000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2997967000	USD
CY2021Q3	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	55551000	USD
CY2020Q4	us-gaap	Unamortized Loan Commitment And Origination Fees And Unamortized Discounts Or Premiums UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums	61264000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	2936148000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Of Deferred Income LoansAndLeasesReceivableNetOfDeferredIncome	3059231000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	28000000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	29484000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	2908148000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Net Reported Amount LoansAndLeasesReceivableNetReportedAmount	3029747000	USD
CY2021Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	28066000	USD
CY2021Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	-29000	USD
CY2021Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	120000	USD
CY2021Q3	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	83000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	28000000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	29484000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	1268000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	3121000	USD
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	369000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	28000000	USD
CY2020Q2	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	24465000	USD
CY2020Q3	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	2509000	USD
CY2020Q4	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	12285000	USD
CY2020Q3	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	241000	USD
CY2020Q3	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	184000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	26917000	USD
CY2019Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	21840000	USD
	us-gaap	Provision For Loan And Lease Losses ProvisionForLoanAndLeaseLosses	6461000	USD
	us-gaap	Allowance For Loan And Lease Losses Write Offs AllowanceForLoanAndLeaseLossesWriteOffs	1755000	USD
	us-gaap	Allowance For Loan And Lease Loss Recovery Of Bad Debts AllowanceForLoanAndLeaseLossRecoveryOfBadDebts	371000	USD
CY2020Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	26917000	USD
CY2021Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2869907000	USD
CY2021Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	10691000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2880597000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	26540000	USD
CY2021Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	1461000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	28000000	USD
CY2020Q4	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	2985682000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2997967000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	26394000	USD
CY2020Q4	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	3090000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Allowance LoansAndLeasesReceivableAllowance	29484000	USD
CY2021Q3	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	1844000	USD
CY2021Q3	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	2878753000	USD
CY2021Q3	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2880597000	USD
CY2021Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	5245000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment Current FinancingReceivableRecordedInvestmentCurrent	2992722000	USD
CY2020Q4	us-gaap	Loans And Leases Receivable Gross Carrying Amount LoansAndLeasesReceivableGrossCarryingAmount	2997967000	USD
CY2020Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	0	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	6943000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	7292000	USD
CY2021Q3	inbk	Impaired Financing Receivable Loans With No Specific Related Allowance ImpairedFinancingReceivableLoansWithNoSpecificRelatedAllowance	0	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment	6276000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With No Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance	6483000	USD
CY2020Q4	inbk	Impaired Financing Receivable Loans With No Specific Related Allowance ImpairedFinancingReceivableLoansWithNoSpecificRelatedAllowance	0	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	3748000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	3794000	USD
CY2021Q3	inbk	Impaired Financing Receivable Loans With Specific Related Allowance ImpairedFinancingReceivableLoansWithSpecificRelatedAllowance	1461000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment	6009000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable With Related Allowance Unpaid Principal Balance ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance	6036000	USD
CY2020Q4	inbk	Impaired Financing Receivable Loans With Specific Related Allowance ImpairedFinancingReceivableLoansWithSpecificRelatedAllowance	3090000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	10691000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	11086000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	1461000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Recorded Investment ImpairedFinancingReceivableRecordedInvestment	12285000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Unpaid Principal Balance ImpairedFinancingReceivableUnpaidPrincipalBalance	12519000	USD
CY2020Q4	us-gaap	Impaired Financing Receivable Related Allowance ImpairedFinancingReceivableRelatedAllowance	3090000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	7076000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	15000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	6550000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	55000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	7175000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	42000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithNoRelatedAllowanceAverageRecordedInvestment	7034000	USD
	us-gaap	Impaired Financing Receivable With No Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithNoRelatedAllowanceInterestIncomeAccrualMethod	122000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	4897000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	37000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	6160000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	51000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	7235000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	73000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Average Recorded Investment ImpairedFinancingReceivableWithRelatedAllowanceAverageRecordedInvestment	5309000	USD
	us-gaap	Impaired Financing Receivable With Related Allowance Interest Income Accrual Method ImpairedFinancingReceivableWithRelatedAllowanceInterestIncomeAccrualMethod	51000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	11973000	USD
CY2021Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	52000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	12710000	USD
CY2020Q3	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	106000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	14410000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	115000	USD
	us-gaap	Impaired Financing Receivable Average Recorded Investment ImpairedFinancingReceivableAverageRecordedInvestment	12343000	USD
	us-gaap	Impaired Financing Receivable Interest Income Accrual Method ImpairedFinancingReceivableInterestIncomeAccrualMethod	173000	USD
CY2021Q3	us-gaap	Other Real Estate OtherRealEstate	1200000	USD
CY2021Q3	inbk	Mortgage Loans In Process Of Foreclosure Number Of Loans MortgageLoansInProcessOfForeclosureNumberOfLoans	2	loan
CY2021Q3	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	400000	USD
CY2020Q4	us-gaap	Mortgage Loans In Process Of Foreclosure Amount MortgageLoansInProcessOfForeclosureAmount	0	USD
CY2020Q3	us-gaap	Financing Receivable Modifications Number Of Contracts2 FinancingReceivableModificationsNumberOfContracts2	0	security
CY2021Q3	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	6491000	USD
CY2020Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	10973000	USD
CY2021Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	52700000	USD
CY2020Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	37590000	USD
CY2021Q3	us-gaap	Goodwill Goodwill	4700000	USD
CY2020Q4	us-gaap	Goodwill Goodwill	4700000	USD
CY2021Q2	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	4120000	USD
CY2020Q2	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	2522000	USD
CY2021Q3	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	566000	USD
CY2020Q3	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	399000	USD
CY2021Q3	us-gaap	Servicing Asset At Fair Value Disposals ServicingAssetAtFairValueDisposals	176000	USD
CY2020Q3	us-gaap	Servicing Asset At Fair Value Disposals ServicingAssetAtFairValueDisposals	103000	USD
CY2021Q3	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	-98000	USD
CY2020Q3	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	0	USD
CY2021Q3	inbk	Servicing Asset At Fair Value Loan Servicing Asset Revaluation ServicingAssetAtFairValueLoanServicingAssetRevaluation	274000	USD
CY2020Q3	inbk	Servicing Asset At Fair Value Loan Servicing Asset Revaluation ServicingAssetAtFairValueLoanServicingAssetRevaluation	103000	USD
CY2021Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	4412000	USD
CY2020Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	2818000	USD
CY2020Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	3569000	USD
CY2019Q4	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	2481000	USD
	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	1512000	USD
	us-gaap	Servicing Asset At Fair Value Additions ServicingAssetAtFairValueAdditions	709000	USD
	us-gaap	Servicing Asset At Fair Value Disposals ServicingAssetAtFairValueDisposals	500000	USD
	us-gaap	Servicing Asset At Fair Value Disposals ServicingAssetAtFairValueDisposals	372000	USD
	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	-169000	USD
	us-gaap	Servicing Asset At Fair Value Changes In Fair Value Resulting From Changes In Valuation Inputs Or Changes In Assumptions ServicingAssetAtFairValueChangesInFairValueResultingFromChangesInValuationInputsOrChangesInAssumptions	0	USD
	inbk	Servicing Asset At Fair Value Loan Servicing Asset Revaluation ServicingAssetAtFairValueLoanServicingAssetRevaluation	669000	USD
	inbk	Servicing Asset At Fair Value Loan Servicing Asset Revaluation ServicingAssetAtFairValueLoanServicingAssetRevaluation	372000	USD
CY2021Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	4412000	USD
CY2020Q3	us-gaap	Servicing Asset At Fair Value Amount ServicingAssetAtFairValueAmount	2818000	USD
CY2021Q3	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized	2500000	USD
	us-gaap	Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1 EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedPeriodForRecognition1	P1Y8M12D
	inbk	Sharebased Compensation Arrangementby Sharebase Payment Award Percentageof Annual Retainer Receivedin Common Stockor Deferred Stock Rights SharebasedCompensationArrangementbySharebasePaymentAwardPercentageofAnnualRetainerReceivedinCommonStockorDeferredStockRights	1
CY2020Q4	inbk	Deferred Stock Related To Directors Deferred Stock Plan Outstanding Number DeferredStockRelatedToDirectorsDeferredStockPlanOutstandingNumber	83835	shares
	inbk	Deferred Stock Related To Directors Deferred Stock Plan Granted In Period DeferredStockRelatedToDirectorsDeferredStockPlanGrantedInPeriod	526	shares
	inbk	Deferred Stock Related To Directors Deferred Stock Plan Exercised In Period DeferredStockRelatedToDirectorsDeferredStockPlanExercisedInPeriod	0	shares
CY2021Q3	inbk	Deferred Stock Related To Directors Deferred Stock Plan Outstanding Number DeferredStockRelatedToDirectorsDeferredStockPlanOutstandingNumber	84361	shares
CY2021Q3	us-gaap	Contractual Obligation ContractualObligation	276900000	USD
CY2020Q4	us-gaap	Contractual Obligation ContractualObligation	263900000	USD
CY2021Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	634007000	USD
CY2021Q3	us-gaap	Servicing Asset ServicingAsset	4412000	USD
CY2020Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	497628000	USD
CY2020Q4	us-gaap	Servicing Asset ServicingAsset	3569000	USD
CY2021Q3	inbk	Loans Held For Sale LoansHeldForSale	24789000	USD
CY2021Q3	us-gaap	Long Term Debt LongTermDebt	514920000	USD
CY2021Q3	inbk	Carrying Value Liabilities Measured On Recurring Basis Subordinated Debt Obligations CarryingValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations	104156000	USD
CY2021Q3	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	1568000	USD
CY2020Q4	inbk	Loans Held For Sale LoansHeldForSale	13243000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	514916000	USD
CY2020Q4	inbk	Carrying Value Liabilities Measured On Recurring Basis Subordinated Debt Obligations CarryingValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations	79603000	USD
CY2020Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	1439000	USD
CY2021Q3	us-gaap	Payments To Purchase Mortgage Loans Held For Sale PaymentsToPurchaseMortgageLoansHeldForSale	198300000	USD
CY2020Q3	us-gaap	Payments To Purchase Mortgage Loans Held For Sale PaymentsToPurchaseMortgageLoansHeldForSale	216000000	USD
CY2021Q3	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	186100000	USD
CY2020Q3	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	203700000	USD
	us-gaap	Payments To Purchase Mortgage Loans Held For Sale PaymentsToPurchaseMortgageLoansHeldForSale	585500000	USD
	us-gaap	Payments To Purchase Mortgage Loans Held For Sale PaymentsToPurchaseMortgageLoansHeldForSale	431400000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	579200000	USD
	us-gaap	Proceeds From Sale Of Mortgage Loans Held For Sale ProceedsFromSaleOfMortgageLoansHeldForSale	429300000	USD
CY2020Q2	us-gaap	Payments For Derivative Instrument Investing Activities PaymentsForDerivativeInstrumentInvestingActivities	46100000	USD
CY2021Q3	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	158602000	USD
CY2021Q3	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	1298000	USD
CY2020Q4	us-gaap	Derivative Asset Notional Amount DerivativeAssetNotionalAmount	108095000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral	3361000	USD
CY2021Q3	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	260000000	USD
CY2021Q3	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-18710000	USD
CY2020Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	405700000	USD
CY2020Q4	us-gaap	Derivative Fair Value Of Derivative Net DerivativeFairValueOfDerivativeNet	-30390000	USD
	us-gaap	Oci Before Reclassifications Before Tax Attributable To Parent OciBeforeReclassificationsBeforeTaxAttributableToParent	5069000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	5069000	USD
	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	1041000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	4028000	USD
	us-gaap	Oci Before Reclassifications Before Tax Attributable To Parent OciBeforeReclassificationsBeforeTaxAttributableToParent	-6266000	USD
	us-gaap	Reclassification From Aoci Current Period Before Tax Attributable To Parent ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent	139000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-6405000	USD
	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-1506000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-4899000	USD
CY2021Q3	us-gaap	Oci Before Reclassifications Before Tax Attributable To Parent OciBeforeReclassificationsBeforeTaxAttributableToParent	-350000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-350000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-93000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-257000	USD
CY2020Q3	us-gaap	Oci Before Reclassifications Before Tax Attributable To Parent OciBeforeReclassificationsBeforeTaxAttributableToParent	2900000	USD
CY2020Q3	us-gaap	Reclassification From Aoci Current Period Before Tax Attributable To Parent ReclassificationFromAociCurrentPeriodBeforeTaxAttributableToParent	98000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	2802000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	754000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	2048000	USD

Files In Submission

Name	View Source	Status
0001562463-21-000090-index-headers.html	Edgar Link	pending
0001562463-21-000090-index.html	Edgar Link	pending
0001562463-21-000090.txt	Edgar Link	pending
0001562463-21-000090-xbrl.zip	Edgar Link	pending
ex311-2021q3.htm	Edgar Link	pending
ex312-2021q3.htm	Edgar Link	pending
ex321-2021q3.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
inbk-20210930.htm	Edgar Link	pending
inbk-20210930.xsd	Edgar Link	pending
inbk-20210930_cal.xml	Edgar Link	unprocessable
inbk-20210930_def.xml	Edgar Link	unprocessable
inbk-20210930_htm.xml	Edgar Link	completed
inbk-20210930_lab.xml	Edgar Link	unprocessable
inbk-20210930_pre.xml	Edgar Link	unprocessable
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending

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$INBK
First Internet Bancorp Stock $inbk

2021 Q4 Form 10-Q Financial Statement

#000156246321000090 Filed on November 09, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

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$INBK First Internet Bancorp Stock $inbk

2021 Q4 Form 10-Q Financial Statement

#000156246321000090 Filed on November 09, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

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First Internet Bancorp Stock $inbk