XML 50 R40.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Loans - Recorded Investments in Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Jun. 30, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Dec. 31, 2016
--- | --- | --- | --- | --- | --- | ---
Loans: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | $ 2,478,371 |  | $ 2,081,224 |  |  |
Ending balance: individually evaluated for impairment | 10,118 |  | 5,205 |  |  |
Total Loans Receivable | 2,488,489 |  | 2,086,429 |  |  |
Allowance for loan losses: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 16,704 |  | 14,970 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Ending balance | 16,704 | $ 16,053 | 14,970 | $ 14,087 | $ 13,194 | $ 10,981
Commercial and industrial |  |  |  |  |  |
Loans: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 97,540 |  | 119,054 |  |  |
Ending balance: individually evaluated for impairment | 7,949 |  | 3,886 |  |  |
Allowance for loan losses: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 1,307 |  | 1,738 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Ending balance | 1,307 | 1,364 | 1,738 | 1,681 | 1,525 | 1,352
Owner-occupied commercial real estate |  |  |  |  |  |
Loans: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 92,089 |  | 75,761 |  |  |
Ending balance: individually evaluated for impairment | 1,479 |  | 7 |  |  |
Allowance for loan losses: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 958 |  | 803 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Ending balance | 958 | 889 | 803 | 805 | 716 | 582
Investor commercial real estate |  |  |  |  |  |
Loans: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 5,595 |  | 7,273 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Allowance for loan losses: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 62 |  | 85 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Ending balance | 62 | 67 | 85 | 87 | 109 | 168
Construction |  |  |  |  |  |
Loans: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 38,228 |  | 49,213 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Allowance for loan losses: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 241 |  | 423 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Ending balance | 241 | 295 | 423 | 433 | 395 | 544
Single tenant lease financing |  |  |  |  |  |
Loans: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 883,372 |  | 803,299 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Allowance for loan losses: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 8,480 |  | 7,872 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Ending balance | 8,480 | 8,294 | 7,872 | 7,684 | 7,403 | 6,248
Public finance |  |  |  |  |  |
Loans: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 610,858 |  | 438,341 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Allowance for loan losses: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 1,454 |  | 959 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Ending balance | 1,454 | 1,372 | 959 | 563 | 362 | 0
Healthcare finance |  |  |  |  |  |
Loans: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 89,525 |  | 31,573 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Allowance for loan losses: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 925 |  | 313 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Ending balance | 925 | 676 | 313 | 123 | 28 | 0
Residential mortgage |  |  |  |  |  |
Loans: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 361,995 |  | 298,796 |  |  |
Ending balance: individually evaluated for impairment | 579 |  | 1,139 |  |  |
Allowance for loan losses: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 978 |  | 956 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Ending balance | 978 | 909 | 956 | 958 | 991 | 754
Home equity |  |  |  |  |  |
Loans: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 28,713 |  | 30,471 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 83 |  |  |
Allowance for loan losses: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 54 |  | 70 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Ending balance | 54 | 54 | 70 | 75 | 80 | 102
Other consumer |  |  |  |  |  |
Loans: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 270,456 |  | 227,443 |  |  |
Ending balance: individually evaluated for impairment | 111 |  | 90 |  |  |
Allowance for loan losses: |  |  |  |  |  |
Ending balance: collectively evaluated for impairment | 2,245 |  | 1,751 |  |  |
Ending balance: individually evaluated for impairment | 0 |  | 0 |  |  |
Ending balance | 2,245 | $ 2,133 | 1,751 | $ 1,678 | $ 1,585 | $ 1,231
Commercial Portfolio Segment |  |  |  |  |  |
Loans: |  |  |  |  |  |
Total Loans Receivable | 1,826,635 |  | 1,528,407 |  |  |
Commercial Portfolio Segment | Commercial and industrial |  |  |  |  |  |
Loans: |  |  |  |  |  |
Total Loans Receivable | 105,489 |  | 122,940 |  |  |
Commercial Portfolio Segment | Owner-occupied commercial real estate |  |  |  |  |  |
Loans: |  |  |  |  |  |
Total Loans Receivable | 93,568 |  | 75,768 |  |  |
Commercial Portfolio Segment | Investor commercial real estate |  |  |  |  |  |
Loans: |  |  |  |  |  |
Total Loans Receivable | 5,595 |  | 7,273 |  |  |
Commercial Portfolio Segment | Construction |  |  |  |  |  |
Loans: |  |  |  |  |  |
Total Loans Receivable | 38,228 |  | 49,213 |  |  |
Commercial Portfolio Segment | Single tenant lease financing |  |  |  |  |  |
Loans: |  |  |  |  |  |
Total Loans Receivable | 883,372 |  | 803,299 |  |  |
Commercial Portfolio Segment | Public finance |  |  |  |  |  |
Loans: |  |  |  |  |  |
Total Loans Receivable | 610,858 |  | 438,341 |  |  |
Commercial Portfolio Segment | Healthcare finance |  |  |  |  |  |
Loans: |  |  |  |  |  |
Total Loans Receivable | $ 89,525 |  | $ 31,573 |  |  |

X
- References No definition available. + Details
Name: | inbk_AllowancesForLoansAndLeaseLossProvisionForLossNetAbstract
Namespace Prefix: | inbk_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossAdditionalInformationAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of valuation allowance for financing receivables that are expected to be uncollectible that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The balance of financing receivables that were collectively evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableCollectivelyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The balance of financing receivables that were individually evaluated for impairment. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 + Details
Name: | us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=84173941&loc=SL6953423-111524 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.7(d)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SAB Topic 6.L.1) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74567-122707 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b)(1)(ii) -URI http://asc.fasb.org/extlink&oid=82894903&loc=d3e15032-111544 + Details
Name: | us-gaap_LoansAndLeasesReceivableAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before allowance of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Includes deferred interest and fees, undisbursed portion of loan balance, unamortized costs and premiums and discounts from face amounts. Excludes loans and leases covered under loss sharing agreements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82891408&loc=d3e4428-111522 + Details
Name: | us-gaap_LoansAndLeasesReceivableGrossCarryingAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_CommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=inbk_OwnerOccupiedCommercialRealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_RealEstateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ConstructionLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=inbk_SingleTenantLeaseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=inbk_PublicFinanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=inbk_HealthcareFinanceMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_ResidentialMortgageMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_HomeEquityLoanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=inbk_OtherConsumerLoansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |