Investment Securities - Held-to-maturity Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	$ 694,313	$ 560,453
Allowance for Credit Losses	(241)	(241)
Gross Unrealized Gains	1,954	536
Gross Unrealized Losses	(71,697)	(82,239)
Fair Value	624,436	478,509
U.S. government sponsored agencies
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	194,184	132,366
Allowance for Credit Losses	0	0
Gross Unrealized Gains	385	130
Gross Unrealized Losses	(8,123)	(9,476)
Fair Value	186,446	123,020
States and political subdivisions
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	145,085	145,263
Allowance for Credit Losses	(241)	(241)
Gross Unrealized Gains	199	162
Gross Unrealized Losses	(30,851)	(36,408)
Fair Value	114,192	108,776
Residential mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	245,294	176,215
Allowance for Credit Losses	0	0
Gross Unrealized Gains	1,321	244
Gross Unrealized Losses	(16,345)	(18,461)
Fair Value	230,377	157,998
Commercial mortgage-backed securities
Schedule of Held-to-maturity Securities [Line Items]
Amortized Cost	109,750	106,609
Allowance for Credit Losses	0	0
Gross Unrealized Gains	49	0
Gross Unrealized Losses	(16,378)	(17,894)
Fair Value	$ 93,421	$ 88,715