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Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | $ 1,489,071 | $ 1,516,841
Gross Unrealized Gains | 2,448 | 5,424
Gross Unrealized Losses | (244,789) | (222,564)
Fair Value | 1,246,730 | 1,299,701
U.S. Treasury and U.S. government sponsored entities |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 137,732 | 145,439
Gross Unrealized Gains | 4 | 113
Gross Unrealized Losses | (18,742) | (17,597)
Fair Value | 118,994 | 127,955
State and political subdivisions |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 611,199 | 644,880
Gross Unrealized Gains | 2,140 | 4,792
Gross Unrealized Losses | (103,291) | (93,503)
Fair Value | 510,048 | 556,169
Corporate bonds |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 18,383 | 18,554
Gross Unrealized Gains | 210 | 187
Gross Unrealized Losses | (471) | (466)
Fair Value | 18,122 | 18,275
Mortgage-backed securities - residential |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 614,694 | 624,529
Gross Unrealized Gains | 7 | 1
Gross Unrealized Losses | (114,612) | (104,144)
Fair Value | 500,089 | 520,386
Collateralized mortgage obligations |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 104,097 | 80,227
Gross Unrealized Gains | 87 | 331
Gross Unrealized Losses | (7,403) | (6,559)
Fair Value | 96,781 | 73,999
Small Business Administration |  |
Debt Securities, Available-for-Sale [Line Items] |  |
Amortized Cost | 2,966 | 3,212
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (270) | (295)
Fair Value | $ 2,696 | $ 2,917

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