Investment Securities - Held-to-maturity Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 674,166	$ 560,453
Allowance for Credit Losses	(241)	(241)
Gross Unrealized Gains	672	536
Gross Unrealized Losses	(80,329)	(82,239)
Fair Value	594,268	478,509
U.S. government sponsored agencies
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	176,027	132,366
Allowance for Credit Losses	0	0
Gross Unrealized Gains	74	130
Gross Unrealized Losses	(9,867)	(9,476)
Fair Value	166,234	123,020
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	144,909	145,263
Allowance for Credit Losses	(241)	(241)
Gross Unrealized Gains	124	162
Gross Unrealized Losses	(31,991)	(36,408)
Fair Value	112,801	108,776
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	243,807	176,215
Allowance for Credit Losses	0	0
Gross Unrealized Gains	474	244
Gross Unrealized Losses	(20,326)	(18,461)
Fair Value	223,955	157,998
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	109,423	106,609
Allowance for Credit Losses	0	0
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(18,145)	(17,894)
Fair Value	$ 91,278	$ 88,715