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Securities - Schedule of Available-for-Sale Debt Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 1,380,783 | $ 1,367,123
Gross Unrealized Gains | 12,338 | 3,835
Gross Unrealized Losses | 102,068 | 139,426
Fair Value | 1,291,053 | 1,231,532
U.S. Treasuries |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 55,405 | 75,141
Gross Unrealized Gains | 222 | 140
Gross Unrealized Losses | 2,194 | 3,784
Fair Value | 53,433 | 71,497
Obligations of U.S. Government sponsored entities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 363,764 | 398,648
Gross Unrealized Gains | 5,989 | 2,008
Gross Unrealized Losses | 12,753 | 20,376
Fair Value | 357,000 | 380,280
Obligations of U.S. states and political subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 81,888 | 86,328
Gross Unrealized Gains | 10 | 4
Gross Unrealized Losses | 5,632 | 8,638
Fair Value | 76,266 | 77,694
U.S. Government agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 104,338 | 68,130
Gross Unrealized Gains | 643 | 3
Gross Unrealized Losses | 3,702 | 4,879
Fair Value | 101,279 | 63,254
U.S. Government sponsored entities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 772,888 | 736,376
Gross Unrealized Gains | 5,474 | 1,680
Gross Unrealized Losses | 77,731 | 101,696
Fair Value | 700,631 | 636,360
U.S. corporate debt securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 2,500 | 2,500
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 56 | 53
Fair Value | $ 2,444 | $ 2,447

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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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