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Investment Securities - Amortized Cost and Estimated Fair Values of Investment Securities (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024 | Dec. 31, 2024
Available for sale securities: |  |  |  |  |
Amortized Cost | $ 188,267 |  | $ 188,267 |  | $ 159,593
Gross Unrealized Gains | 759 |  | 759 |  | 557
Gross Unrealized Losses | 7,306 |  | 7,306 |  | 10,938
Available for sale securities | 181,720 |  | 181,720 |  | 149,212
Available for sale securities sold | 0 | $ 0 | 0 | $ 0 |
U.S. Treasury and government agency securities |  |  |  |  |
Available for sale securities: |  |  |  |  |
Amortized Cost | 22,409 |  | 22,409 |  | 22,984
Gross Unrealized Gains | 3 |  | 3 |  | 4
Gross Unrealized Losses | 1,847 |  | 1,847 |  | 2,786
Available for sale securities | 20,565 |  | 20,565 |  | 20,202
Mortgage-backed securities |  |  |  |  |
Available for sale securities: |  |  |  |  |
Amortized Cost | 161,614 |  | 161,614 |  | 130,439
Gross Unrealized Gains | 287 |  | 287 |  | 84
Gross Unrealized Losses | 5,459 |  | 5,459 |  | 8,139
Available for sale securities | 156,442 |  | 156,442 |  | 122,384
Other debt securities |  |  |  |  |
Available for sale securities: |  |  |  |  |
Amortized Cost | 4,244 |  | 4,244 |  | 6,170
Gross Unrealized Gains | 469 |  | 469 |  | 469
Gross Unrealized Losses | 0 |  | 0 |  | 13
Available for sale securities | $ 4,713 |  | $ 4,713 |  | $ 6,626

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- Definition Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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- Definition Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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- Definition Amortized cost excluding accrued interest, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
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