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DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS (Tables) | 9 Months Ended
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Sep. 30, 2025
DISCLOSURES ABOUT FAIR VALUE OF FINANCIAL INSTRUMENTS |
Schedule of fair value measurements of assets recognized in the accompanying statements of financial condition measured at fair value on a recurring basis and the level within the fair value hierarchy in which the fair value measurements | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Fair value measurements using
​ | ​ | ​ | ​ | ​ | Quoted prices | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | in active | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | markets | ​ | Other | ​ | Significant
​ | ​ | ​ | ​ | ​ | for identical | ​ | observable | ​ | unobservable
​ | ​ | ​ | ​ | ​ | assets | ​ | inputs | ​ | inputs
​ |  | Fair value |  | (Level 1) |  | (Level 2) |  | (Level 3)
​ | ​ | (In Thousands)
September 30, 2025 | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |
Available-for-sale securities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Agency mortgage-backed securities | ​ | $ | 304,645 | ​ | $ | — | ​ | $ | 304,645 | ​ | $ | —
Agency collateralized mortgage obligations | ​ |  | 116,013 | ​ | ​ | — | ​ | ​ | 116,013 | ​ | ​ | —
States and political subdivisions securities | ​ |  | 53,746 | ​ | ​ | — | ​ | ​ | 53,746 | ​ | ​ | —
Small Business Administration securities | ​ |  | 56,944 | ​ | ​ | — | ​ | ​ | 56,944 | ​ | ​ | —
Interest rate derivative asset | ​ |  | 5,797 | ​ | ​ | — | ​ | ​ | 5,797 | ​ | ​ | —
Interest rate derivative liability | ​ |  | (12,412) | ​ | ​ | — | ​ | ​ | (12,412) | ​ | ​ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2024 | ​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Available-for-sale securities | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Agency mortgage-backed securities | ​ | $ | 305,907 | ​ | $ | — | ​ | $ | 305,907 | ​ | $ | —
Agency collateralized mortgage obligations | ​ |  | 113,624 | ​ | ​ | — | ​ | ​ | 113,624 | ​ | ​ | —
States and political subdivisions securities | ​ |  | 55,948 | ​ | ​ | — | ​ | ​ | 55,948 | ​ | ​ | —
Small Business Administration securities | ​ |  | 57,894 | ​ | ​ | — | ​ | ​ | 57,894 | ​ | ​ | —
Interest rate derivative asset | ​ |  | 8,065 | ​ | ​ | — | ​ | ​ | 8,065 | ​ | ​ | —
Interest rate derivative liability | ​ |  | (25,000) | ​ | ​ | — | ​ | ​ | (25,000) | ​ | ​ | —
Schedule of fair value measurements of assets measured at fair value on a nonrecurring basis | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | Fair Value Measurements Using
​ | ​ | ​ | ​ | ​ | Quoted prices | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | in active | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | markets | ​ | Other | ​ | Significant
​ | ​ | ​ | ​ | ​ | for identical | ​ | observable | ​ | unobservable
​ | ​ | ​ | ​ | ​ | assets | ​ | inputs | ​ | inputs
​ |  | Fair value |  | (Level 1) |  | (Level 2) |  | (Level 3)
​ | ​ | (In Thousands)
September 30, 2025 | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ | ​ |
Collateral-dependent loans | ​ | $ | — | ​ | $ | — | ​ | $ | — | ​ | $ | —
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
December 31, 2024 | ​ |  | ​ | ​ |  |  | ​ |  |  | ​ |  |
Collateral-dependent loans | ​ | $ | 701 | ​ | $ | — | ​ | $ | — | ​ | $ | 701
Schedule of estimated fair values of the Company's financial instruments not recorded at fair value on the statements of financial condition | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2025 |  | December 31, 2024
​ | ​ | Carrying | ​ | Fair | ​ | Hierarchy | ​ | Carrying | ​ | Fair | ​ | Hierarchy
​ |  | Amount |  | Value |  | Level |  | Amount |  | Value |  | Level
​ | ​ | (In Thousands)
Financial assets | ​ | ​ |  |  | ​ |  | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ |
Cash and cash equivalents | ​ | $ | 196,235 | ​ | $ | 196,235 |  | 1 | ​ | $ | 195,756 | ​ | $ | 195,756 |  | 1
Held-to-maturity securities | ​ | ​ | 181,315 | ​ | ​ | 163,589 | ​ | 2 | ​ | ​ | 187,433 | ​ | ​ | 162,765 | ​ | 2
Mortgage loans held for sale | ​ |  | 5,593 | ​ | ​ | 5,593 |  | 2 | ​ |  | 6,937 | ​ |  | 6,937 |  | 2
Loans, net of allowance for credit losses | ​ |  | 4,467,683 | ​ | ​ | 4,348,382 |  | 3 | ​ |  | 4,690,393 | ​ |  | 4,529,729 |  | 3
Interest receivable | ​ |  | 19,931 | ​ | ​ | 19,931 |  | 3 | ​ |  | 20,430 | ​ |  | 20,430 |  | 3
Investment in FHLBank stock and other assets | ​ |  | 25,603 | ​ | ​ | 25,603 |  | 3 | ​ |  | 28,392 | ​ |  | 28,392 |  | 3
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financial liabilities | ​ |  | ​ | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ |  | ​
Deposits | ​ |  | 4,528,033 | ​ | ​ | 4,525,509 |  | 3 | ​ |  | 4,605,549 | ​ |  | 4,602,312 |  | 3
Short-term borrowings | ​ |  | 468,581 | ​ | ​ | 468,581 |  | 3 | ​ |  | 578,691 | ​ |  | 578,691 |  | 3
Subordinated debentures | ​ |  | 25,774 | ​ | ​ | 25,774 |  | 3 | ​ |  | 25,774 | ​ |  | 25,774 |  | 3
Subordinated notes | ​ |  | — | ​ | ​ | — |  | 2 | ​ |  | 74,876 | ​ |  | 74,438 |  | 2
Interest payable | ​ |  | 3,909 | ​ | ​ | 3,909 |  | 3 | ​ |  | 12,761 | ​ |  | 12,761 |  | 3
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Unrecognized financial instruments (net of contractual value) | ​ |  | ​ | ​ | ​ | ​ |  | ​ | ​ |  | ​ | ​ |  | ​ |  | ​
Commitments to originate loans | ​ |  | — | ​ | ​ | — |  | 3 | ​ |  | — | ​ |  | — |  | 3
Letters of credit | ​ |  | 53 | ​ | ​ | 53 |  | 3 | ​ |  | 72 | ​ |  | 72 |  | 3
Lines of credit | ​ |  | — | ​ | ​ | — |  | 3 | ​ |  | — | ​ |  | — |  | 3
​

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- Definition Tabular disclosure of assets and liabilities by class, including financial instruments measured at fair value that are classified in shareholders' equity, if any, that are measured at fair value on a nonrecurring basis in periods after initial recognition (for example, impaired assets). Disclosures may include, but are not limited to: (a) the fair value measurements recorded and the reasons for the measurements and (b) the level within the fair value hierarchy in which the fair value measurements are categorized in their entirety (levels 1, 2, 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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- Definition Tabular disclosure of assets, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, by class that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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