Investment in Securities - Schedule of Investment Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
Amortized Cost	$ 681,825	$ 684,917
Gross Unrealized Gains	33	4
Gross Unrealized Losses	(59,929)	(57,804)
Fair Value	621,929	627,117
AFS, Less than 12 months, Estimated Fair Value	67,930	82,743
AFS, Less than 12 months, Unrealized Losses	657	675
AFS, 12 months or more, Estimated Fair Value	531,394	541,391
AFS, 12 months or more, Unrealized Losses	59,272	57,129
Debt Securities, Available-for-sale, Unrealized Loss Position	599,324	624,134
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	59,929	57,804
State and political subdivisions
Marketable Securities [Line Items]
Amortized Cost	227,068	235,297
Gross Unrealized Gains	6	4
Gross Unrealized Losses	(17,370)	(16,266)
Fair Value	209,704	219,035
AFS, Less than 12 months, Estimated Fair Value	26,244	63,198
AFS, Less than 12 months, Unrealized Losses	164	220
AFS, 12 months or more, Estimated Fair Value	175,899	152,854
AFS, 12 months or more, Unrealized Losses	17,206	16,046
Debt Securities, Available-for-sale, Unrealized Loss Position	202,143	216,052
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	17,370	16,266
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises
Marketable Securities [Line Items]
Amortized Cost	208,586	188,307
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(32,218)	(30,508)
Fair Value	176,368	157,799
AFS, Less than 12 months, Estimated Fair Value	29,086	0
AFS, Less than 12 months, Unrealized Losses	92	0
AFS, 12 months or more, Estimated Fair Value	147,282	157,799
AFS, 12 months or more, Unrealized Losses	32,126	30,508
Debt Securities, Available-for-sale, Unrealized Loss Position	176,368	157,799
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	32,218	30,508
Corporate bonds
Marketable Securities [Line Items]
Amortized Cost	119,048	111,109
Gross Unrealized Gains	27	0
Gross Unrealized Losses	(9,162)	(8,769)
Fair Value	109,913	102,340
AFS, Less than 12 months, Estimated Fair Value	12,600	19,545
AFS, Less than 12 months, Unrealized Losses	401	455
AFS, 12 months or more, Estimated Fair Value	82,269	82,795
AFS, 12 months or more, Unrealized Losses	8,761	8,314
Debt Securities, Available-for-sale, Unrealized Loss Position	94,869	102,340
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	9,162	8,769
Treasury securities
Marketable Securities [Line Items]
Amortized Cost	84,922	109,836
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(400)	(1,115)
Fair Value	84,522	108,721
AFS, Less than 12 months, Estimated Fair Value	0	0
AFS, Less than 12 months, Unrealized Losses	0	0
AFS, 12 months or more, Estimated Fair Value	84,522	108,721
AFS, 12 months or more, Unrealized Losses	400	1,115
Debt Securities, Available-for-sale, Unrealized Loss Position	84,522	108,721
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	400	1,115
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises
Marketable Securities [Line Items]
Amortized Cost	42,201	40,368
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(779)	(1,146)
Fair Value	41,422	39,222
AFS, Less than 12 months, Estimated Fair Value	0	0
AFS, Less than 12 months, Unrealized Losses	0	0
AFS, 12 months or more, Estimated Fair Value	41,422	39,222
AFS, 12 months or more, Unrealized Losses	779	1,146
Debt Securities, Available-for-sale, Unrealized Loss Position	41,422	39,222
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 779	$ 1,146

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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