Investment Securities - Available for Sale Securities Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Fair Value
Less Than 12 Months	$ 561,256	$ 688,212
12 Months or Greater	57,902	27,099
Total	619,158	715,311
Gross Unrealized Losses
Less Than 12 Months	(33,855)	(11,044)
12 Months or Greater	(6,357)	(865)
Total	(40,212)	(11,909)
U.S. treasury securities
Fair Value
Less Than 12 Months	85,998	87,302
12 Months or Greater	0	0
Total	85,998	87,302
Gross Unrealized Losses
Less Than 12 Months	(4,449)	(1,087)
12 Months or Greater	0	0
Total	(4,449)	(1,087)
U.S. agency
Fair Value
Less Than 12 Months	6,893	10,969
12 Months or Greater	0	0
Total	6,893	10,969
Gross Unrealized Losses
Less Than 12 Months	(251)	(140)
12 Months or Greater	0	0
Total	(251)	(140)
Asset backed securities
Fair Value
Less Than 12 Months	21,734
12 Months or Greater	4,052
Total	25,786
Gross Unrealized Losses
Less Than 12 Months	(356)
12 Months or Greater	(175)
Total	(531)
State, county & municipal securities
Fair Value
Less Than 12 Months	142,665	180,551
12 Months or Greater	14,430	5,970
Total	157,095	186,521
Gross Unrealized Losses
Less Than 12 Months	(13,806)	(3,131)
12 Months or Greater	(1,889)	(225)
Total	(15,695)	(3,356)
Corporate debt securities
Fair Value
Less Than 12 Months	43,103	31,977
12 Months or Greater	0	0
Total	43,103	31,977
Gross Unrealized Losses
Less Than 12 Months	(1,719)	(265)
12 Months or Greater	0	0
Total	(1,719)	(265)
Mortgage-backed securities
Fair Value
Less Than 12 Months	260,863	377,413
12 Months or Greater	39,420	21,129
Total	300,283	398,542
Gross Unrealized Losses
Less Than 12 Months	(13,274)	(6,421)
12 Months or Greater	(4,293)	(640)
Total	$ (17,567)	$ (7,061)