XML 65 R51.htm IDEA: XBRL DOCUMENT
v3.25.4

Derivative Financial Instruments (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2025
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value | The following table presents the notional amount and fair value of interest rate swaps utilized by the Company at December 31, 2025 and 2024.
|  | December 31, 2025 |  | December 31, 2024
(amounts in thousands) |  | Notional Amount |  | Fair Value |  | Notional Amount |  | Fair Value
Asset Derivatives |  |  |  |  |  |  |  |
Derivatives not designated as hedging instruments |  |  |  |  |  |  |  |
Back-to-back swaps |  | $ | 45,050 |  |  | $ | 210 |  |  | $ | 27,214 |  |  | $ | 200 |
Total contracts |  | $ | 45,050 |  |  | $ | 210 |  |  | $ | 27,214 |  |  | $ | 200 |
Liability Derivatives |  |  |  |  |  |  |  |
Derivatives not designated as hedging instruments |  |  |  |  |  |  |  |
Back-to-back swaps |  | $ | 45,050 |  |  | $ | (210) |  |  | $ | 27,214 |  |  | $ | (200) |
Total contracts |  | $ | 45,050 |  |  | $ | (210) |  |  | $ | 27,214 |  |  | $ | (200) |
Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss) | The following table presents the effects of the Company's cash flow hedge relationships on the consolidated statements of comprehensive (loss) income during the twelve months ended December 31, 2025, 2024 and 2023.
|  | Amount of Loss Recognized in Other Comprehensive (Loss) Income in the Twelve Months Ended
(amounts in thousands) |  | December 31, 2025 |  | December 31, 2024 |  | December 31, 2023
Interest rate swap agreements |  | $ | — |  |  | $ | — |  |  | $ | (2,566) |
Schedule Of Derivative Instruments In Statements Of Income Fair Value | The following table summarizes the effect of periodic changes in the fair value of derivatives not designated as hedging instruments on the condensed consolidated statements of operations for the twelve months ended December 31, 2025, 2024 and 2023.
|  | Amount of Loss Recognized in the Twelve Months Ended
(amounts in thousands) |  | December 31, 2025 |  | December 31, 2024 |  | December 31, 2023
Liability Derivatives |  |  |  |  |  |
Derivatives not designated as hedging instruments |  |  |  |  |  |
IRLCs |  | $ | — |  |  | $ | — |  |  | $ | (133) |
Forward contracts |  | — |  |  | — |  |  | (119) |
Derivative Instruments, Gain (Loss) | The following table presents the effects of the Company's interest rate swap agreements on the condensed consolidated statements of operations during the twelve months ended December 31, 2025, 2024 and 2023.
Line Item in the Condensed Consolidated Statements of Operations |  |
| December 31, 2025 |  | December 31, 2024 |  | December 31, 2023 |  |
Interest income |  |  |  |  |  |  |  |
Securities - non-taxable |  | $ | — |  |  | $ | 1,367 |  |  | $ | 1,471 |  |  |
Total interest income |  | — |  |  | 1,367 |  |  | 1,471 |  |  |
Interest expense |  |  |  |  |  |  |  |
Deposits |  | — |  |  | (424) |  |  | (1,671) |  |  |
Other borrowed funds |  | — |  |  | (2,833) |  |  | (2,622) |  |  |
Total interest expense |  | — |  |  | (3,257) |  |  | (4,293) |  |  |
Net interest income |  | $ | — |  |  | $ | 4,624 |  |  | $ | 5,764 |  |  |
Noninterest income |  |  |  |  |  |  |  |
Other 1 |  | $ | — |  |  | $ | 2,904 |  |  | $ | — |  |  |
Total noninterest income |  | $ | — |  |  | $ | 2,904 |  |  | $ | — |  |  |
1 The Company recognized a gain on termination of interest rate swaps for the year ended December 31, 2024.

X
- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of income. + References No definition available. + Details
Name: | inbk_ScheduleOfDerivativeInstrumentsInStatementsOfIncomeFairValueTableTextBlock
Namespace Prefix: | inbk_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of gain (loss) on derivative and nonderivative instruments designated and qualifying as cash flow hedge recorded in accumulated other comprehensive income (AOCI) and reclassified into earnings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A + Details
Name: | us-gaap_ScheduleOfCashFlowHedgesIncludedInAccumulatedOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4CC -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4CC Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4C -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4C Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E + Details
Name: | us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 182 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480401/815-10-55-182 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4E Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4B -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4B + Details
Name: | us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration