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Securities - Securities Available for Sale (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost | $ 851,647 | $ 817,664
Gross Unrealized Gains | 11,447 | 2,245
Gross Unrealized Losses | (36,621) | (51,662)
Fair value | 826,473 | 768,247
Asset Pledged as Collateral |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Fair value | 264,900 | 289,900
U.S. Treasury Securities |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost | 155,902 | 179,835
Gross Unrealized Gains |  | 3
Gross Unrealized Losses | (8,703) | (12,090)
Fair value | 147,199 | 167,748
Municipal Bonds |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost | 247,471 | 139,891
Gross Unrealized Gains | 6,614 | 23
Gross Unrealized Losses | (13,538) | (17,649)
Fair value | 240,547 | 122,265
Mortgage-Backed Securities |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost | 267,171 | 259,833
Gross Unrealized Gains | 2,877 | 882
Gross Unrealized Losses | (10,899) | (15,825)
Fair value | 259,149 | 244,890
Corporate Securities |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost | 109,613 | 139,161
Gross Unrealized Gains | 1,791 | 1,041
Gross Unrealized Losses | (3,421) | (6,016)
Fair value | 107,983 | 134,186
U.S. Government Agency Securities |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost | 9,803 | 22,053
Gross Unrealized Gains | 73 | 85
Gross Unrealized Losses | (41) | (56)
Fair value | 9,835 | 22,082
Asset-Backed Securities |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost | 61,687 | 76,891
Gross Unrealized Gains | 92 | 211
Gross Unrealized Losses | (19) | (26)
Fair value | $ 61,760 | $ 77,076

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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, before 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/2003/role/disclosureRef -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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