XML 74 R65.htm IDEA: XBRL DOCUMENT v3.23.3

Fair Value of Financial Instruments - Fair Value Hierarchy (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Total available-for-sale securities	$ 450,827	$ 390,384
Loans held-for-sale (mandatory pricing agreements)	9,110	9,110
Servicing asset	9,579	6,255
Derivative, fair value	81	0
Loans Held For Sale
Loans held-for-sale (mandatory pricing agreements)		9,110
Quoted Prices in Active Markets for Identical Assets (Level 1)
Total available-for-sale securities	0	0
Servicing asset	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Loans Held For Sale
Loans held-for-sale (mandatory pricing agreements)		0
Significant Other Observable Inputs (Level 2)
Total available-for-sale securities	450,827	390,384
Servicing asset	0	0
Significant Other Observable Inputs (Level 2) | Loans Held For Sale
Loans held-for-sale (mandatory pricing agreements)		9,110
Significant Unobservable Inputs (Level 3)
Total available-for-sale securities	0	0
Servicing asset	9,579	6,255
Significant Unobservable Inputs (Level 3) | Loans Held For Sale
Loans held-for-sale (mandatory pricing agreements)		0
U.S. Government-sponsored agencies
Total available-for-sale securities	97,178	33,809
U.S. Government-sponsored agencies | Quoted Prices in Active Markets for Identical Assets (Level 1)
Total available-for-sale securities	0	0
U.S. Government-sponsored agencies | Significant Other Observable Inputs (Level 2)
Total available-for-sale securities	97,178	33,809
U.S. Government-sponsored agencies | Significant Unobservable Inputs (Level 3)
Total available-for-sale securities	0	0
Municipal securities
Total available-for-sale securities	62,772	67,276
Municipal securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Total available-for-sale securities	0	0
Municipal securities | Significant Other Observable Inputs (Level 2)
Total available-for-sale securities	62,772	67,276
Municipal securities | Significant Unobservable Inputs (Level 3)
Total available-for-sale securities	0	0
Agency mortgage-backed securities - residential 1
Total available-for-sale securities	193,096	215,092
Agency mortgage-backed securities - residential 1 | Quoted Prices in Active Markets for Identical Assets (Level 1)
Total available-for-sale securities	0	0
Agency mortgage-backed securities - residential 1 | Significant Other Observable Inputs (Level 2)
Total available-for-sale securities		215,092
Agency mortgage-backed securities - residential 1 | Significant Unobservable Inputs (Level 3)
Total available-for-sale securities	0	0
Private label mortgage-backed securities - residential
Total available-for-sale securities	18,576	10,455
Private label mortgage-backed securities - residential | Quoted Prices in Active Markets for Identical Assets (Level 1)
Total available-for-sale securities	0	0
Private label mortgage-backed securities - residential | Significant Unobservable Inputs (Level 3)
Total available-for-sale securities	0	0
Asset-backed securities
Total available-for-sale securities	6,703	4,960
Asset-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Total available-for-sale securities	0	0
Asset-backed securities | Significant Other Observable Inputs (Level 2)
Total available-for-sale securities	6,703	4,960
Asset-backed securities | Significant Unobservable Inputs (Level 3)
Total available-for-sale securities	0	0
Corporate securities
Total available-for-sale securities	36,339	42,952
Corporate securities | Quoted Prices in Active Markets for Identical Assets (Level 1)
Total available-for-sale securities	0	0
Corporate securities | Significant Other Observable Inputs (Level 2)
Total available-for-sale securities	36,339	42,952
Corporate securities | Significant Unobservable Inputs (Level 3)
Total available-for-sale securities	0	0
IRLCs
Derivative, fair value		133
IRLCs | Quoted Prices in Active Markets for Identical Assets (Level 1)
Derivative, fair value		0
IRLCs | Significant Other Observable Inputs (Level 2)
Derivative, fair value		0
IRLCs | Significant Unobservable Inputs (Level 3)
Derivative, fair value		133
Agency mortgage-backed securities - commercial
Total available-for-sale securities	36,163	15,840
Agency mortgage-backed securities - commercial | Quoted Prices in Active Markets for Identical Assets (Level 1)
Total available-for-sale securities	0	0
Agency mortgage-backed securities - commercial | Significant Other Observable Inputs (Level 2)
Total available-for-sale securities	36,163	15,840
Agency mortgage-backed securities - commercial | Significant Unobservable Inputs (Level 3)
Total available-for-sale securities	0	0
Interest rate swaps | Interest rate swaps
Interest rate swap agreements - assets (back-to-back)	(81)
Interest rate swap agreements - liabilities (back-to-back)	(81)
Derivative liability, fair value	8,934	8,645
Interest rate swaps | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate swaps
Interest rate swap agreements - assets (back-to-back)	0
Interest rate swap agreements - liabilities (back-to-back)	0
Derivative liability, fair value	0	0
Interest rate swaps | Significant Other Observable Inputs (Level 2) | Interest rate swaps
Interest rate swap agreements - assets (back-to-back)	(81)
Interest rate swap agreements - liabilities (back-to-back)	(81)
Derivative liability, fair value	8,934	8,645
Interest rate swaps | Significant Unobservable Inputs (Level 3) | Interest rate swaps
Interest rate swap agreements - assets (back-to-back)	0
Interest rate swap agreements - liabilities (back-to-back)	0
Derivative liability, fair value	0	0
Forward contracts | Forward contracts
Derivative, fair value		97
Forward contracts | Quoted Prices in Active Markets for Identical Assets (Level 1) | Forward contracts
Derivative, fair value		97
Forward contracts | Significant Other Observable Inputs (Level 2) | Forward contracts
Derivative, fair value		0
Forward contracts | Significant Unobservable Inputs (Level 3) | Forward contracts
Derivative, fair value		0
Derivatives designated as hedging instruments | Interest rate swaps
Derivative, fair value	$ 1,717	$ 2,093

X

- Definition

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (aa)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481800/320-10-50-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 320
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481830/320-10-45-1

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(6))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 30
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479130/326-30-45-1

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesDebtSecurities
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483444/210-20-55-22

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483466/210-20-50-3

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 7
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483444/210-20-55-7

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4B

Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 4D
-Subparagraph (c)(2)
-SubTopic 20
-Topic 860
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481326/860-20-50-4D

+ Details

Name:	us-gaap_DerivativeFairValueOfDerivativeLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 825
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 10
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482907/825-10-50-10

+ Details

Name:	us-gaap_DerivativeFairValueOfDerivativeNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value, after effect of master netting arrangement, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and contract can be net settled by means outside contract or delivery of asset. Includes derivative subject to master netting arrangement not elected or qualified to offset. Excludes derivative not subject to master netting arrangement or similar agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483466/210-20-50-3

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 22
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483444/210-20-55-22

+ Details

Name:	us-gaap_DerivativeLiabilityAfterOffsetSubjectToMasterNettingArrangement
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Fair value of asset associated with financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-SubTopic 20
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483466/210-20-50-3

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 55
-Paragraph 8
-SubTopic 20
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483444/210-20-55-8

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 5C
-Subparagraph (SX 210.12-13C(Column F))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-5C

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 946
-SubTopic 320
-Name Accounting Standards Codification
-Section S99
-Paragraph 5B
-Subparagraph (SX 210.12-13B(Column E))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480032/946-320-S99-5B

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 210
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 20
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483444/210-20-55-20

Reference 6: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4B
-Subparagraph (a),(c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480434/815-10-50-4B

+ Details

Name:	us-gaap_DerivativeLiabilityFairValueGrossAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

+ References

No definition available.

+ Details

Name:	us-gaap_LoansHeldForSaleFairValueDisclosure
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Aggregate amount of servicing assets that are subsequently measured at fair value and servicing assets that are subsequently measured using the amortization method.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 860
-SubTopic 50
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481260/860-50-45-2

+ Details

Name:	us-gaap_ServicingAsset
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_AssetsSoldUnderAgreementsToRepurchaseAxis=inbk_LoansHeldForSaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel1Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel2Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FairValueByFairValueHierarchyLevelAxis=us-gaap_FairValueInputsLevel3Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_USGovernmentSponsoredEnterprisesDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MunicipalBondsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_MortgageBackedSecuritiesIssuedByPrivateEnterprisesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_AssetBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_InterestRateLockCommitmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_InterestRateSwapMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForwardContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis=us-gaap_ForwardContractsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_HedgingDesignationAxis=us-gaap_DesignatedAsHedgingInstrumentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: