Securities, HTM Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($) Position	Dec. 31, 2021 USD ($) Position
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 603,822	$ 211,184
12 months or longer	109,428	104,585
Total	713,250	315,769
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(52,860)	(3,311)
12 months or longer	(19,987)	(4,679)
Total	$ (72,847)	$ (7,990)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	245	56
12 months or longer | Position	28	14
Total | Position	273	70
HTM debt securities on nonaccrual status	$ 0	$ 0
Accrued interest reversed against interest income	0	0
Collateral-dependent HTM debt securities	0	0
AIR on HTM debt securities	3,200	2,700
Past Due [Member]
Unrealized Loss Position, Number of Positions [Abstract]
HTM debt securities	0	0
Federal Agency [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	0	0
12 months or longer	84,850	95,635
Total	84,850	95,635
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	0	0
12 months or longer	(15,150)	(4,365)
Total	$ (15,150)	$ (4,365)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	0	0
12 months or longer | Position	4	4
Total | Position	4	4
Mortgage-Backed [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 241,782	$ 103,789
12 months or longer	0	0
Total	241,782	103,789
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(26,815)	(1,319)
12 months or longer	0	0
Total	$ (26,815)	$ (1,319)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	33	10
12 months or longer | Position	0	0
Total | Position	33	10
Collateralized Mortgage Obligations [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 209,362	$ 54,612
12 months or longer	0	0
Total	209,362	54,612
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(12,004)	(803)
12 months or longer	0	0
Total	$ (12,004)	$ (803)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	44	6
12 months or longer | Position	0	0
Total | Position	44	6
State & Municipal [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 152,678	$ 52,783
12 months or longer	24,578	8,950
Total	177,256	61,733
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(14,041)	(1,189)
12 months or longer	(4,837)	(314)
Total	$ (18,878)	$ (1,503)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	168	40
12 months or longer | Position	24	10
Total | Position	192	50
US Government Agencies Debt Securities and US Government-sponsored Enterprises Debt Securities [Member]
Unrealized Loss Position, Number of Positions [Abstract]
Held-to-maturity debt securities, percentage	69.00%	56.00%