XML 54 R67.htm IDEA: XBRL DOCUMENT
v3.20.1

Fair Value of Financial Instruments - Fair Value Hierarchy (Details) - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Total available-for-sale securities | $ 608,682 | $ 540,852
Servicing asset | 2,415 | 2,481
Loans held-for-sale (mandatory pricing agreements) | 52,394 | 56,097
Derivative, fair value | (80,850) | (37,939)
Loans held-for-sale (mandatory pricing agreements) |  |
Loans held-for-sale (mandatory pricing agreements) | 52,394 | 56,097
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 (mandatory pricing agreements) |  |
Loans held-for-sale (mandatory pricing agreements) | 0 | 0
Significant Other Observable Inputs (Level 2) |  |
Total available-for-sale securities | 608,682 | 540,852
Servicing asset | 0 | 0
Significant Other Observable Inputs (Level 2) | Loans held-for-sale (mandatory pricing agreements) |  |
Loans held-for-sale (mandatory pricing agreements) | 52,394 | 56,097
Significant Unobservable Inputs (Level 3) |  |
Total available-for-sale securities | 0 | 0
Servicing asset | 2,415 | 2,481
Significant Unobservable Inputs (Level 3) | Loans held-for-sale (mandatory pricing agreements) |  |
Loans held-for-sale (mandatory pricing agreements) | 0 | 0
U.S. Government-sponsored agencies |  |
Total available-for-sale securities | 70,004 | 75,872
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 | 70,004 | 75,872
U.S. Government-sponsored agencies | Significant Unobservable Inputs (Level 3) |  |
Total available-for-sale securities | 0 | 0
Municipal securities |  |
Total available-for-sale securities | 94,819 | 97,652
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 | 94,819 | 97,652
Municipal securities | Significant Unobservable Inputs (Level 3) |  |
Total available-for-sale securities | 0 | 0
Agency mortgage-backed securities |  |
Total available-for-sale securities | 282,632 | 261,440
Agency mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Total available-for-sale securities | 0 | 0
Agency mortgage-backed securities | Significant Other Observable Inputs (Level 2) |  |
Total available-for-sale securities |  | 261,440
Agency mortgage-backed securities | Significant Unobservable Inputs (Level 3) |  |
Total available-for-sale securities | 0 | 0
Private label mortgage-backed securities |  |
Total available-for-sale securities | 115,024 | 63,613
Private label mortgage-backed securities | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Total available-for-sale securities |  | 0
Private label mortgage-backed securities | Significant Unobservable Inputs (Level 3) |  |
Total available-for-sale securities | 0 | 0
Asset-backed securities |  |
Total available-for-sale securities | 4,713 | 4,955
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 | 4,713 | 4,955
Asset-backed securities | Significant Unobservable Inputs (Level 3) |  |
Total available-for-sale securities | 0 | 0
Corporate securities |  |
Total available-for-sale securities | 41,490 | 37,320
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 | 41,490 | 37,320
Corporate securities | Significant Unobservable Inputs (Level 3) |  |
Total available-for-sale securities | 0 | 0
IRLCs |  |
Derivative, fair value | 2,064 | 910
IRLCs | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Derivative, fair value | 0 | 0
IRLCs | Significant Other Observable Inputs (Level 2) |  |
Derivative, fair value | 0 | 0
IRLCs | Significant Unobservable Inputs (Level 3) |  |
Derivative, fair value | 2,064 | 910
Interest rate swaps | Interest rate swaps |  |
Derivative liability, fair value | (78,552) | (37,786)
Interest rate swaps | Quoted Prices in Active Markets for Identical Assets (Level 1) | Interest rate swaps |  |
Derivative liability, fair value | 0 | 0
Interest rate swaps | Significant Other Observable Inputs (Level 2) | Interest rate swaps |  |
Derivative liability, fair value | (78,552) | (37,786)
Interest rate swaps | Significant Unobservable Inputs (Level 3) | Interest rate swaps |  |
Derivative liability, fair value | 0 | 0
Forward contracts | Forward contracts |  |
Derivative, fair value | (2,298) | (153)
Forward contracts | Quoted Prices in Active Markets for Identical Assets (Level 1) | Forward contracts |  |
Derivative, fair value | (2,298) | (153)
Forward contracts | Significant Other Observable Inputs (Level 2) | Forward contracts |  |
Derivative, fair value | 0 | 0
Forward contracts | Significant Unobservable Inputs (Level 3) | Forward contracts |  |
Derivative, fair value | $ 0 | $ 0

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 -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942338&loc=SL82898722-210454 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118954083&loc=d3e26610-111562 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27161-111563 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=118948506&loc=SL51823488-111719 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624163-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 + 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 -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 + Details
Name: | us-gaap_DerivativeFairValueOfDerivativeNet
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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 50 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6469459&loc=d3e122501-111745 + 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_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: |