Securities, HTM Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2022 USD ($) Position	Dec. 31, 2021 USD ($) Position
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 518,471	$ 211,184
12 months or longer	233,632	104,585
Total	752,103	315,769
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(55,100)	(3,311)
12 months or longer	(60,348)	(4,679)
Total	$ (115,448)	$ (7,990)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	261	56
12 months or longer | Position	61	14
Total | Position	322	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	3,300	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	78,821	95,635
Total	78,821	95,635
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	0	0
12 months or longer	(21,179)	(4,365)
Total	$ (21,179)	$ (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	$ 159,823	$ 103,789
12 months or longer	71,827	0
Total	231,650	103,789
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(24,108)	(1,319)
12 months or longer	(17,411)	0
Total	$ (41,519)	$ (1,319)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	25	10
12 months or longer | Position	9	0
Total | Position	34	10
Collateralized Mortgage Obligations [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 204,362	$ 54,612
12 months or longer	42,467	0
Total	246,829	54,612
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(13,975)	(803)
12 months or longer	(9,704)	0
Total	$ (23,679)	$ (803)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	47	6
12 months or longer | Position	6	0
Total | Position	53	6
State & Municipal [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 154,286	$ 52,783
12 months or longer	40,517	8,950
Total	194,803	61,733
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(17,017)	(1,189)
12 months or longer	(12,054)	(314)
Total	$ (29,071)	$ (1,503)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	189	40
12 months or longer | Position	42	10
Total | Position	231	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%