Investment in Securities - Schedule of Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
Amortized Cost	$ 597,606	$ 684,917
Gross Unrealized Gains	600	4
Gross Unrealized Losses	(47,450)	(57,804)
Fair Value	550,756	627,117
AFS, Less than 12 months, Estimated Fair Value	59,648	82,743
AFS, Less than 12 months, Unrealized Losses	501	675
AFS, 12 months or more, Estimated Fair Value	440,503	541,391
AFS, 12 months or more, Unrealized Losses	46,949	57,129
Debt Securities, Available-for-sale, Unrealized Loss Position	500,151	624,134
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	47,450	57,804
State and political subdivisions
Marketable Securities [Line Items]
Amortized Cost	216,438	235,297
Gross Unrealized Gains	35	4
Gross Unrealized Losses	(13,368)	(16,266)
Fair Value	203,105	219,035
AFS, Less than 12 months, Estimated Fair Value	4,971	63,198
AFS, Less than 12 months, Unrealized Losses	4	220
AFS, 12 months or more, Estimated Fair Value	178,533	152,854
AFS, 12 months or more, Unrealized Losses	13,364	16,046
Debt Securities, Available-for-sale, Unrealized Loss Position	183,504	216,052
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	13,368	16,266
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises
Marketable Securities [Line Items]
Amortized Cost	225,749	188,307
Gross Unrealized Gains	548	0
Gross Unrealized Losses	(27,024)	(30,508)
Fair Value	199,273	157,799
AFS, Less than 12 months, Estimated Fair Value	28,995	0
AFS, Less than 12 months, Unrealized Losses	173	0
AFS, 12 months or more, Estimated Fair Value	144,309	157,799
AFS, 12 months or more, Unrealized Losses	26,851	30,508
Debt Securities, Available-for-sale, Unrealized Loss Position	173,304	157,799
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	27,024	30,508
Corporate bonds
Marketable Securities [Line Items]
Amortized Cost	118,923	111,109
Gross Unrealized Gains	17	0
Gross Unrealized Losses	(6,552)	(8,769)
Fair Value	112,388	102,340
AFS, Less than 12 months, Estimated Fair Value	25,682	19,545
AFS, Less than 12 months, Unrealized Losses	324	455
AFS, 12 months or more, Estimated Fair Value	81,671	82,795
AFS, 12 months or more, Unrealized Losses	6,228	8,314
Debt Securities, Available-for-sale, Unrealized Loss Position	107,353	102,340
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	6,552	8,769
Treasury securities
Marketable Securities [Line Items]
Amortized Cost		109,836
Gross Unrealized Gains		0
Gross Unrealized Losses		(1,115)
Fair Value		108,721
AFS, Less than 12 months, Estimated Fair Value		0
AFS, Less than 12 months, Unrealized Losses		0
AFS, 12 months or more, Estimated Fair Value		108,721
AFS, 12 months or more, Unrealized Losses		1,115
Debt Securities, Available-for-sale, Unrealized Loss Position		108,721
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss		1,115
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises
Marketable Securities [Line Items]
Amortized Cost	36,496	40,368
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(506)	(1,146)
Fair Value	35,990	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	35,990	39,222
AFS, 12 months or more, Unrealized Losses	506	1,146
Debt Securities, Available-for-sale, Unrealized Loss Position	35,990	39,222
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 506	$ 1,146