Investment Securities - Held to Maturity Continuous Loss Position (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Fair Value
Less Than 12 Months	$ 13,149	$ 23,438
12 Months or Greater	385,460	386,766
Total	398,609	410,204
Gross Unrealized Losses
Less Than 12 Months	(209)	(2,121)
12 Months or Greater	(49,076)	(52,505)
Total	(49,285)	(54,626)
U.S. treasury securities
Fair Value
Less Than 12 Months	0	0
12 Months or Greater	87,853	87,466
Total	87,853	87,466
Gross Unrealized Losses
Less Than 12 Months	0	0
12 Months or Greater	(4,601)	(4,149)
Total	(4,601)	(4,149)
U.S. agency
Fair Value
Less Than 12 Months	0	0
12 Months or Greater	14,579	14,571
Total	14,579	14,571
Gross Unrealized Losses
Less Than 12 Months	0	0
12 Months or Greater	(1,766)	(1,838)
Total	(1,766)	(1,838)
State, county & municipal securities
Fair Value
Less Than 12 Months	13,149	9,858
12 Months or Greater	101,721	105,734
Total	114,870	115,592
Gross Unrealized Losses
Less Than 12 Months	(209)	(1,392)
12 Months or Greater	(15,310)	(18,126)
Total	(15,519)	(19,518)
Mortgage-backed securities
Fair Value
Less Than 12 Months	0	13,580
12 Months or Greater	181,307	178,995
Total	181,307	192,575
Gross Unrealized Losses
Less Than 12 Months	0	(729)
12 Months or Greater	(27,399)	(28,392)
Total	$ (27,399)	$ (29,121)