XML 57 R48.htm IDEA: XBRL DOCUMENT v3.23.3

Loans - Recorded Investments in Loans (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Dec. 31, 2021
Loans:
Ending balance: collectively evaluated for impairment			$ 3,427,463
Ending balance: individually evaluated for impairment			25,144
Total commercial and consumer loans	$ 3,694,728		3,452,607
Allowance for loan losses:
Ending balance: collectively evaluated for impairment			30,983
Ending balance: individually evaluated for impairment			754
Total loans	36,452	$ 36,058	31,737	$ 29,866	$ 29,153	$ 27,841
Commercial and industrial
Loans:
Ending balance: collectively evaluated for impairment			116,307
Ending balance: individually evaluated for impairment			9,801
Allowance for loan losses:
Ending balance: collectively evaluated for impairment			1,660
Ending balance: individually evaluated for impairment			51
Total loans	2,110	1,849	1,711	1,727	2,026	1,891
Owner-occupied commercial real estate
Loans:
Ending balance: collectively evaluated for impairment			60,266
Ending balance: individually evaluated for impairment			1,570
Allowance for loan losses:
Ending balance: collectively evaluated for impairment			651
Ending balance: individually evaluated for impairment			0
Total loans	858	789	651	616	703	742
Investor commercial real estate
Loans:
Ending balance: collectively evaluated for impairment			93,121
Ending balance: individually evaluated for impairment			0
Allowance for loan losses:
Ending balance: collectively evaluated for impairment			1,099
Ending balance: individually evaluated for impairment			0
Total loans	1,313	1,416	1,099	1,074	621	328
Construction
Loans:
Ending balance: collectively evaluated for impairment			181,966
Ending balance: individually evaluated for impairment			0
Allowance for loan losses:
Ending balance: collectively evaluated for impairment			2,074
Ending balance: individually evaluated for impairment			0
Total loans	2,103	1,940	2,074	1,590	1,707	1,612
Single tenant lease financing
Loans:
Ending balance: collectively evaluated for impairment			939,240
Ending balance: individually evaluated for impairment			0
Allowance for loan losses:
Ending balance: collectively evaluated for impairment			10,519
Ending balance: individually evaluated for impairment			0
Total loans	8,365	9,970	10,519	10,027	9,712	10,385
Public finance
Loans:
Ending balance: collectively evaluated for impairment			621,032
Ending balance: individually evaluated for impairment			0
Allowance for loan losses:
Ending balance: collectively evaluated for impairment			1,753
Ending balance: individually evaluated for impairment			0
Total loans	1,411	1,509	1,753	1,789	1,850	1,776
Healthcare finance
Loans:
Ending balance: collectively evaluated for impairment			272,461
Ending balance: individually evaluated for impairment			0
Allowance for loan losses:
Ending balance: collectively evaluated for impairment			2,997
Ending balance: individually evaluated for impairment			0
Total loans	2,227	2,421	2,997	3,612	4,762	5,940
Small business lending
Loans:
Ending balance: collectively evaluated for impairment			113,699
Ending balance: individually evaluated for impairment			10,051
Allowance for loan losses:
Ending balance: collectively evaluated for impairment			1,465
Ending balance: individually evaluated for impairment			703
Total loans	4,221	2,618	2,168	2,046	1,956	1,387
Franchise finance
Loans:
Ending balance: collectively evaluated for impairment			299,835
Ending balance: individually evaluated for impairment			0
Allowance for loan losses:
Ending balance: collectively evaluated for impairment			3,988
Ending balance: individually evaluated for impairment			0
Total loans	5,247	4,484	3,988	3,015	2,281	1,083
Residential mortgage
Loans:
Ending balance: collectively evaluated for impairment			380,272
Ending balance: individually evaluated for impairment			3,676
Allowance for loan losses:
Ending balance: collectively evaluated for impairment			1,559
Ending balance: individually evaluated for impairment			0
Total loans	2,280	2,550	1,559	1,370	1,138	643
Home equity
Loans:
Ending balance: collectively evaluated for impairment			24,683
Ending balance: individually evaluated for impairment			29
Allowance for loan losses:
Ending balance: collectively evaluated for impairment			69
Ending balance: individually evaluated for impairment			0
Total loans	192	224	69	62	54	64
Other consumer loans
Loans:
Ending balance: collectively evaluated for impairment			324,581
Ending balance: individually evaluated for impairment			17
Allowance for loan losses:
Ending balance: collectively evaluated for impairment			3,149
Ending balance: individually evaluated for impairment			0
Total loans	6,125	$ 6,288	3,149	2,938	$ 2,343	1,990
Tax Refund Advance Loans
Allowance for loan losses:
Total loans				$ 0		$ 0
Commercial Portfolio Segment
Loans:
Total commercial and consumer loans	2,908,232		2,719,349
Allowance for loan losses:
Total loans			26,960
Commercial Portfolio Segment | Commercial and industrial
Loans:
Total commercial and consumer loans	114,265		126,108
Allowance for loan losses:
Total loans			1,711
Commercial Portfolio Segment | Owner-occupied commercial real estate
Loans:
Total commercial and consumer loans	58,486		61,836
Allowance for loan losses:
Total loans			651
Commercial Portfolio Segment | Investor commercial real estate
Loans:
Total commercial and consumer loans	129,831		93,121
Allowance for loan losses:
Total loans			1,099
Commercial Portfolio Segment | Construction
Loans:
Total commercial and consumer loans	252,105		181,966
Allowance for loan losses:
Total loans			2,074
Commercial Portfolio Segment | Single tenant lease financing
Loans:
Total commercial and consumer loans	933,873		939,240
Allowance for loan losses:
Total loans			10,519
Commercial Portfolio Segment | Public finance
Loans:
Total commercial and consumer loans	535,960		621,032
Allowance for loan losses:
Total loans			1,753
Commercial Portfolio Segment | Healthcare finance
Loans:
Total commercial and consumer loans	235,622		272,461
Allowance for loan losses:
Total loans			2,997
Commercial Portfolio Segment | Small business lending
Loans:
Total commercial and consumer loans	192,996		123,750
Allowance for loan losses:
Total loans			2,168
Commercial Portfolio Segment | Franchise finance
Loans:
Total commercial and consumer loans	455,094		299,835
Allowance for loan losses:
Total loans			3,988
Consumer Portfolio
Loans:
Total commercial and consumer loans	786,496		733,258
Allowance for loan losses:
Total loans			4,777
Consumer Portfolio | Residential mortgage
Loans:
Total commercial and consumer loans	393,501		383,948
Allowance for loan losses:
Total loans			1,559
Consumer Portfolio | Home equity
Loans:
Total commercial and consumer loans	23,544		24,712
Allowance for loan losses:
Total loans			69
Consumer Portfolio | Other consumer loans
Loans:
Total commercial and consumer loans	$ 369,451		324,598
Allowance for loan losses:
Total loans			$ 3,149

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

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479344/326-20-45-1

+ Details

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

X

- Definition

The valuation allowance for financing receivables that are expected to be uncollectible that were collectively evaluated for impairment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Subparagraph (g)
-SubTopic 10
-Topic 310
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B

+ 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://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Paragraph 11B
-Subparagraph (g)
-SubTopic 10
-Topic 310
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B

+ 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/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L(5)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480418/310-10-S99-4

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11C
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-11C

+ Details

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

X

- Definition

Amortized cost excluding accrued interest, before allowance for credit loss, fee, and loan in process, of financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481598/310-20-45-2

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 210
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(7))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1

+ Details

Name:	us-gaap_FinancingReceivableExcludingAccruedInterestBeforeAllowanceForCreditLossFeeAndLoanInProcess
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/disclosureRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 11C
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481962/310-10-50-11C

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 310
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 4
-Subparagraph (SAB Topic 6.L(5)(a))
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480418/310-10-S99-4

+ Details

Name:	us-gaap_FinancingReceivableIndividuallyEvaluatedForImpairment
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=inbk_SmallBusinessLendingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=inbk_FranchiseFinanceMember
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_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=inbk_TaxRefundAdvanceLoansMember
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:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: