Investments - Schedule of Available-for-sale and Held-to-Maturity Securities Reconciliation (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	$ 1,769,134	$ 1,729,054
Gross Unrealized Gains	1,603	481
Gross Unrealized Losses	(152,464)	(193,728)
Securities available-for-sale	1,618,273	1,535,807
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	751,219	710,650
Gross Unrealized Gains	7,294	2,484
Gross Unrealized Losses	(61,866)	(84,617)
Allowance for credit losses	(785)	(735)
Debt Securities, Held-to-maturity, Fair Value	696,647	628,517
Total securities held-to-maturity, net	750,434	709,915
Obligations of U.S. Government-sponsored enterprises
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	316,511	266,090
Gross Unrealized Gains	303	0
Gross Unrealized Losses	(20,368)	(28,305)
Securities available-for-sale	296,446	237,785
Obligations of states and political subdivisions
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	500,881	507,842
Gross Unrealized Gains	57	27
Gross Unrealized Losses	(68,767)	(90,425)
Securities available-for-sale	432,171	417,444
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	575,699	529,012
Gross Unrealized Gains	7,078	2,321
Gross Unrealized Losses	(47,461)	(65,347)
Debt Securities, Held-to-maturity, Fair Value	535,316	465,986
Agency mortgage-backed securities
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	758,283	727,931
Gross Unrealized Gains	1,181	453
Gross Unrealized Losses	(59,083)	(68,980)
Securities available-for-sale	700,381	659,404
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	52,100	57,018
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(5,424)	(6,416)
Debt Securities, Held-to-maturity, Fair Value	46,676	50,602
US Treasury Bill Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	8,750	13,750
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,176)	(1,110)
Securities available-for-sale	7,574	12,640
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Abstract]
Amortized Cost	184,709	213,441
Gross Unrealized Gains	62	1
Gross Unrealized Losses	(3,070)	(4,908)
Securities available-for-sale	181,701	208,534
Debt Securities, Held-to-maturity [Abstract]
Amortized Cost	123,420	124,620
Gross Unrealized Gains	216	163
Gross Unrealized Losses	(8,981)	(12,854)
Debt Securities, Held-to-maturity, Fair Value	$ 114,655	$ 111,929