Investment in Securities - Schedule of the Fair Values of Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
Marketable Securities [Line Items]
AFS, Less than 12 months, Estimated Fair Value	$ 295,309	$ 148,111
AFS, Less than 12 months, Unrealized Losses	5,324	1,733
AFS, 12 months or more, Estimated Fair Value	291,487	346,597
AFS, 12 months or more, Unrealized Losses	39,061	38,371
AFS, Total Estimated Fair Value	586,796	494,708
AFS, Total Unrealized Losses	44,385	40,104
State and political subdivisions
Marketable Securities [Line Items]
AFS, Less than 12 months, Estimated Fair Value	5,882	0
AFS, Less than 12 months, Unrealized Losses	5	0
AFS, 12 months or more, Estimated Fair Value	105,314	139,379
AFS, 12 months or more, Unrealized Losses	10,936	10,733
AFS, Total Estimated Fair Value	111,196	139,379
AFS, Total Unrealized Losses	10,941	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	289,427	148,111
AFS, Less than 12 months, Unrealized Losses	5,319	1,733
AFS, 12 months or more, Estimated Fair Value	136,257	155,353
AFS, 12 months or more, Unrealized Losses	25,796	25,314
AFS, Total Estimated Fair Value	425,684	303,464
AFS, Total Unrealized Losses	31,115	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	28,624	28,896
AFS, 12 months or more, Unrealized Losses	2,143	1,999
AFS, Total Estimated Fair Value	28,624	28,896
AFS, Total Unrealized Losses	2,143	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	21,292	22,969
AFS, 12 months or more, Unrealized Losses	186	325
AFS, Total Estimated Fair Value	21,292	22,969
AFS, Total Unrealized Losses	$ 186	$ 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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