Securities, AFS Securities in Continuous Unrealized Loss Position (Details) $ in Thousands	Dec. 31, 2022 USD ($) Position	Dec. 31, 2021 USD ($) Position
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 509,788	$ 811,115
12 months or longer	1,012,964	253,578
Total	1,522,752	1,064,693
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(36,681)	(13,238)
12 months or longer	(180,014)	(8,704)
Total	$ (216,695)	$ (21,942)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	245	127
12 months or longer | Position	170	22
Total | Position	415	149
AIR on AFS debt securities	$ 4,200	$ 3,900
Debt Securities, Available-for-Sale, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration]	Other Assets	Other Assets
U.S. Treasury [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 55,616	$ 49,105
12 months or longer	66,042	0
Total	121,658	49,105
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(3,864)	(6)
12 months or longer	(7,369)	0
Total	$ (11,233)	$ (6)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	5	2
12 months or longer | Position	3	0
Total | Position	8	2
Federal Agency [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 0	$ 41,618
12 months or longer	206,419	198,313
Total	206,419	239,931
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	0	(1,846)
12 months or longer	(42,000)	(6,677)
Total	$ (42,000)	$ (8,523)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	0	4
12 months or longer | Position	16	12
Total | Position	16	16
State & Municipal [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 3,679	$ 87,515
12 months or longer	78,395	0
Total	82,074	87,515
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(341)	(1,559)
12 months or longer	(13,849)	0
Total	$ (14,190)	$ (1,559)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	2	61
12 months or longer | Position	64	0
Total | Position	66	61
Mortgage-Backed [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 204,447	$ 281,217
12 months or longer	267,926	39,491
Total	472,373	320,708
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(15,048)	(4,319)
12 months or longer	(47,303)	(1,525)
Total	$ (62,351)	$ (5,844)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	149	24
12 months or longer | Position	32	6
Total | Position	181	30
Collateralized Mortgage Obligations [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 211,612	$ 341,673
12 months or longer	374,376	15,774
Total	585,988	357,447
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(14,458)	(5,495)
12 months or longer	(66,299)	(502)
Total	$ (80,757)	$ (5,997)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	77	34
12 months or longer | Position	49	4
Total | Position	126	38
Corporate [Member]
Unrealized Loss Position, Fair Value [Abstract]
Less than 12 months	$ 34,434	$ 9,987
12 months or longer	19,806	0
Total	54,240	9,987
Unrealized Loss Position, Unrealized Losses [Abstract]
Less than 12 months	(2,970)	(13)
12 months or longer	(3,194)	0
Total	$ (6,164)	$ (13)
Unrealized Loss Position, Number of Positions [Abstract]
Less than 12 months | Position	12	2
12 months or longer | Position	6	0
Total | Position	18	2