Investment Securities - Held-to-maturity Securities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 683,895	$ 560,453
Allowance for Credit Losses	(238)	(241)
Gross Unrealized Gains	2,266	536
Gross Unrealized Losses	(73,901)	(82,239)
Fair Value	612,022	478,509
U.S. government sponsored agencies
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	188,475	132,366
Allowance for Credit Losses	0	0
Gross Unrealized Gains	489	130
Gross Unrealized Losses	(8,139)	(9,476)
Fair Value	180,825	123,020
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	144,496	145,263
Allowance for Credit Losses	(238)	(241)
Gross Unrealized Gains	134	162
Gross Unrealized Losses	(30,104)	(36,408)
Fair Value	114,288	108,776
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	248,559	176,215
Allowance for Credit Losses	0	0
Gross Unrealized Gains	1,643	244
Gross Unrealized Losses	(18,582)	(18,461)
Fair Value	231,620	157,998
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	102,365	106,609
Allowance for Credit Losses	0	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(17,076)	(17,894)
Fair Value	$ 85,289	$ 88,715