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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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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).

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