Investment in Securities - Schedule of the Fair Values of Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Marketable Securities [Line Items]
AFS, Less than 12 months, Estimated Fair Value	$ 58,524	$ 82,743
AFS, Less than 12 months, Unrealized Losses	549	675
AFS, 12 months or more, Estimated Fair Value	463,853	541,391
AFS, 12 months or more, Unrealized Losses	59,949	57,129
AFS, Total Estimated Fair Value	522,377	624,134
AFS, Total Unrealized Losses	60,498	57,804
State and political subdivisions
Marketable Securities [Line Items]
AFS, Less than 12 months, Estimated Fair Value	4,040	63,198
AFS, Less than 12 months, Unrealized Losses	13	220
AFS, 12 months or more, Estimated Fair Value	189,863	152,854
AFS, 12 months or more, Unrealized Losses	18,414	16,046
AFS, Total Estimated Fair Value	193,903	216,052
AFS, Total Unrealized Losses	18,427	16,266
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises
Marketable Securities [Line Items]
AFS, Less than 12 months, Estimated Fair Value	36,831	0
AFS, Less than 12 months, Unrealized Losses	186	0
AFS, 12 months or more, Estimated Fair Value	142,992	157,799
AFS, 12 months or more, Unrealized Losses	32,261	30,508
AFS, Total Estimated Fair Value	179,823	157,799
AFS, Total Unrealized Losses	32,447	30,508
Corporate bonds
Marketable Securities [Line Items]
AFS, Less than 12 months, Estimated Fair Value	17,653	19,545
AFS, Less than 12 months, Unrealized Losses	350	455
AFS, 12 months or more, Estimated Fair Value	82,255	82,795
AFS, 12 months or more, Unrealized Losses	8,715	8,314
AFS, Total Estimated Fair Value	99,908	102,340
AFS, Total Unrealized Losses	9,065	8,769
Treasury securities
Marketable Securities [Line Items]
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	9,973	108,721
AFS, 12 months or more, Unrealized Losses	19	1,115
AFS, Total Estimated Fair Value	9,973	108,721
AFS, Total Unrealized Losses	19	1,115
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises
Marketable Securities [Line Items]
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	38,770	39,222
AFS, 12 months or more, Unrealized Losses	540	1,146
AFS, Total Estimated Fair Value	38,770	39,222
AFS, Total Unrealized Losses	$ 540	$ 1,146

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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