Securities - Schedule of Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule of Available-for-sale Securities [Line Items]
Fair value less than 12 months	$ 169,405	$ 880,068
Unrealized losses less than 12 months	(10,269)	(75,452)
Fair value more than 12 months	2,368,061	1,719,396
Unrealized losses more than 12 months	(418,801)	(406,840)
Total fair value	2,537,466	2,599,464
Total unrealized losses	(429,070)	(482,292)
U.S. Treasury and federal agencies
Schedule of Available-for-sale Securities [Line Items]
Fair value less than 12 months	4,997	217,357
Unrealized losses less than 12 months	(95)	(16,692)
Fair value more than 12 months	515,322	295,585
Unrealized losses more than 12 months	(68,616)	(59,695)
Total fair value	520,319	512,942
Total unrealized losses	(68,711)	(76,387)
State and municipal
Schedule of Available-for-sale Securities [Line Items]
Fair value less than 12 months	119,929	533,871
Unrealized losses less than 12 months	(2,792)	(45,881)
Fair value more than 12 months	1,116,520	757,061
Unrealized losses more than 12 months	(226,978)	(218,179)
Total fair value	1,236,449	1,290,932
Total unrealized losses	(229,770)	(264,060)
Federal agency collateralized mortgage obligations
Schedule of Available-for-sale Securities [Line Items]
Fair value less than 12 months	6,226	40,301
Unrealized losses less than 12 months	(343)	(2,881)
Fair value more than 12 months	65,710	38,613
Unrealized losses more than 12 months	(9,020)	(7,780)
Total fair value	71,936	78,914
Total unrealized losses	(9,363)	(10,661)
Federal agency mortgage-backed pools
Schedule of Available-for-sale Securities [Line Items]
Fair value less than 12 months	9,256	49,633
Unrealized losses less than 12 months	(304)	(3,211)
Fair value more than 12 months	461,906	428,243
Unrealized losses more than 12 months	(79,075)	(83,810)
Total fair value	471,162	477,876
Total unrealized losses	(79,379)	(87,021)
Private labeled mortgage-backed pools
Schedule of Available-for-sale Securities [Line Items]
Fair value less than 12 months	0	0
Unrealized losses less than 12 months	0	0
Fair value more than 12 months	29,649	29,973
Unrealized losses more than 12 months	(5,186)	(5,493)
Total fair value	29,649	29,973
Total unrealized losses	(5,186)	(5,493)
Corporate notes
Schedule of Available-for-sale Securities [Line Items]
Fair value less than 12 months	28,997	38,906
Unrealized losses less than 12 months	(6,735)	(6,787)
Fair value more than 12 months	178,954	169,921
Unrealized losses more than 12 months	(29,926)	(31,883)
Total fair value	207,951	208,827
Total unrealized losses	$ (36,661)	$ (38,670)