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Note 11 - Fair Values of Financial Instruments | 9 Months Ended
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Sep. 30, 2025
Notes to Financial Statements |
Fair Value Disclosures [Text Block] | 11. FAIR VALUES OF FINANCIAL INSTRUMENTS The carrying amounts, estimated fair values and level within the fair value hierarchy of financial instruments were as follows as of September 30, 2025 and December 31, 2024:
|  | Level in |  | September 30, 2025 |  |  | December 31, 2024 |
|  | Fair |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
|  | Value |  | Carrying |  |  | Fair |  |  | Carrying |  |  | Fair |
(Dollars in thousands) |  | Hierarchy |  | Values |  |  | Values |  |  | Values |  |  | Values |
Financial assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents |  | Level 1 |  | $ | 477,019 |  |  | $ | 477,019 |  |  | $ | 393,010 |  |  | $ | 393,010 |
Securities available for sale |  | (1) |  |  | 855,138 |  |  |  | 855,138 |  |  |  | 730,352 |  |  |  | 730,352 |
FHLBI stock |  | (2) |  |  | 21,513 |  |  |  | 21,513 |  |  |  | 21,513 |  |  |  | 21,513 |
Loans, net |  | Level 3 |  |  | 4,556,031 |  |  |  | 4,622,604 |  |  |  | 4,546,327 |  |  |  | 4,558,628 |
Mortgage loans held for sale |  | Level 2 |  |  | 17,433 |  |  |  | 17,743 |  |  |  | 15,824 |  |  |  | 16,047 |
Accrued interest receivable |  | Level 2 |  |  | 22,846 |  |  |  | 22,846 |  |  |  | 21,401 |  |  |  | 21,401 |
Interest rate swaps |  | Level 2 |  |  | 25,103 |  |  |  | 25,103 |  |  |  | 26,793 |  |  |  | 26,793 |
Financial liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deposits |  | Level 2 |  |  | 4,811,813 |  |  |  | 4,665,277 |  |  |  | 4,698,366 |  |  |  | 4,541,896 |
Securities sold under agreements to repurchase |  | Level 2 |  |  | 251,499 |  |  |  | 251,499 |  |  |  | 121,521 |  |  |  | 121,521 |
FHLBI advances |  | Level 2 |  |  | 346,221 |  |  |  | 339,993 |  |  |  | 387,083 |  |  |  | 374,499 |
Subordinated debentures |  | Level 2 |  |  | 50,844 |  |  |  | 50,850 |  |  |  | 50,330 |  |  |  | 50,336 |
Subordinated notes |  | Level 2 |  |  | 89,571 |  |  |  | 85,158 |  |  |  | 89,314 |  |  |  | 81,825 |
Accrued interest payable |  | Level 2 |  |  | 10,102 |  |  |  | 10,102 |  |  |  | 10,201 |  |  |  | 10,201 |
Interest rate swaps |  | Level 2 |  |  | 25,515 |  |  |  | 25,515 |  |  |  | 27,050 |  |  |  | 27,050 |
| (1) | See Note 12 for a description of the fair value hierarchy as well as a disclosure of levels for classes of financial assets and liabilities.
| (2) | It is not practical to determine the fair value of FHLBI stock due to transferability restrictions; therefore, fair value is estimated at carrying amount.
Carrying amount is the estimated fair value for cash and cash equivalents, FHLBI stock, accrued interest receivable and payable, noninterest-bearing checking accounts and securities sold under agreements to repurchase. Security fair values are based on market prices or dealer quotes, and if no such information is available, on the rate and term of the security and information about the issuer. Fair value for loans is based on an exit price model as required by ASU 2016-01, taking into account inputs such as discounted cash flows, probability of default and loss given default assumptions. The fair value for deposit accounts other than noninterest-bearing checking accounts is based on discounted cash flows using current market rates applied to the estimated life. The fair values of subordinated debentures, subordinated notes, and FHLBI advances are based on current rates for similar financing. The fair values of interest rate swaps are based on discounted cash flows using forecasted yield curves, along with insignificant unobservable inputs, such as borrower credit spreads. The fair value of other off-balance sheet items is estimated to be nominal.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 107 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-107 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 100 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482078/820-10-55-100 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2E -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2E Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 6A -Subparagraph (d) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-6A Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 12: http://www.xbrl.org/2003/role/disclosureRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (g) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 13: http://www.xbrl.org/2003/role/disclosureRef -Topic 940 -SubTopic 820 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147478119/940-820-50-1 + Details
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