Investment in Securities - Schedule of the Fair Values of Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Marketable Securities [Line Items]
AFS, Less than 12 months, Estimated Fair Value	$ 248,804	$ 148,111
AFS, Less than 12 months, Unrealized Losses	3,084	1,733
AFS, 12 months or more, Estimated Fair Value	305,196	346,597
AFS, 12 months or more, Unrealized Losses	39,556	38,371
AFS, Total Estimated Fair Value	554,000	494,708
AFS, Total Unrealized Losses	42,640	40,104
State and political subdivisions
Marketable Securities [Line Items]
AFS, Less than 12 months, Estimated Fair Value	14,601	0
AFS, Less than 12 months, Unrealized Losses	94	0
AFS, 12 months or more, Estimated Fair Value	111,530	139,379
AFS, 12 months or more, Unrealized Losses	11,496	10,733
AFS, Total Estimated Fair Value	126,131	139,379
AFS, Total Unrealized Losses	11,590	10,733
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	234,203	148,111
AFS, Less than 12 months, Unrealized Losses	2,990	1,733
AFS, 12 months or more, Estimated Fair Value	143,021	155,353
AFS, 12 months or more, Unrealized Losses	25,560	25,314
AFS, Total Estimated Fair Value	377,224	303,464
AFS, Total Unrealized Losses	28,550	27,047
Corporate bonds
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	28,651	28,896
AFS, 12 months or more, Unrealized Losses	2,180	1,999
AFS, Total Estimated Fair Value	28,651	28,896
AFS, Total Unrealized Losses	2,180	1,999
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	21,994	22,969
AFS, 12 months or more, Unrealized Losses	320	325
AFS, Total Estimated Fair Value	21,994	22,969
AFS, Total Unrealized Losses	$ 320	$ 325

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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