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Securities - Securities Available for Sale (Details) - USD ($) $ in Thousands | Mar. 31, 2026 | Dec. 31, 2025
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The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost | $ 586,961 | $ 797,191
Gross Unrealized Gains | 5,741 | 14,179
Gross Unrealized Losses | (26,137) | (34,929)
Fair value | 566,565 | 776,441
Asset Pledged as Collateral |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Fair value | 106,800 | 254,300
U.S. Treasury Securities |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost |  | 155,863
Gross Unrealized Losses |  | (9,657)
Fair value |  | 146,206
Municipal Bonds |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost | 208,513 | 242,995
Gross Unrealized Gains | 1,339 | 8,686
Gross Unrealized Losses | (13,191) | (12,513)
Fair value | 196,661 | 239,168
Mortgage-Backed Securities |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost | 238,500 | 252,291
Gross Unrealized Gains | 2,312 | 3,442
Gross Unrealized Losses | (10,492) | (10,061)
Fair value | 230,320 | 245,672
Corporate Securities |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost | 94,728 | 93,080
Gross Unrealized Gains | 2,012 | 1,958
Gross Unrealized Losses | (2,367) | (2,631)
Fair value | 94,373 | 92,407
U.S. Government Agency Securities |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost | 7,654 | 8,664
Gross Unrealized Gains | 75 | 73
Gross Unrealized Losses | (27) | (30)
Fair value | 7,702 | 8,707
Asset-Backed Securities |  |
The amortized cost and estimated fair value of securities with gross unrealized gains and losses |  |
Amortized cost | 37,566 | 44,298
Gross Unrealized Gains | 3 | 20
Gross Unrealized Losses | (60) | (37)
Fair value | $ 37,509 | $ 44,281

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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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