Investment in Securities - Schedule of the Fair Values of Securities with Unrealized Losses (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Marketable Securities [Line Items]
AFS, Less than 12 months, Estimated Fair Value	$ 641,920	$ 328,196
AFS, Less than 12 months, Unrealized Losses	53,813	3,956
AFS, 12 months or more, Estimated Fair Value	95,191	0
AFS, 12 months or more, Unrealized Losses	24,197	0
AFS, Total Estimated Fair Value	737,111	328,196
AFS, Total Unrealized Losses	78,010	3,956
State and political subdivisions
Marketable Securities [Line Items]
AFS, Less than 12 months, Estimated Fair Value	246,743	60,083
AFS, Less than 12 months, Unrealized Losses	19,158	990
AFS, 12 months or more, Estimated Fair Value	30,025	0
AFS, 12 months or more, Unrealized Losses	8,920	0
AFS, Total Estimated Fair Value	276,768	60,083
AFS, Total Unrealized Losses	28,078	990
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	119,478	163,652
AFS, Less than 12 months, Unrealized Losses	18,240	2,200
AFS, 12 months or more, Estimated Fair Value	58,655	0
AFS, 12 months or more, Unrealized Losses	13,738	0
AFS, Total Estimated Fair Value	178,133	163,652
AFS, Total Unrealized Losses	31,978	2,200
Corporate bonds
Marketable Securities [Line Items]
AFS, Less than 12 months, Estimated Fair Value	72,280	55,120
AFS, Less than 12 months, Unrealized Losses	11,075	272
AFS, 12 months or more, Estimated Fair Value	6,511	0
AFS, 12 months or more, Unrealized Losses	1,539	0
AFS, Total Estimated Fair Value	78,791	55,120
AFS, Total Unrealized Losses	12,614	272
U.S. treasury bonds
Marketable Securities [Line Items]
AFS, Less than 12 months, Estimated Fair Value	155,119
AFS, Less than 12 months, Unrealized Losses	3,504
AFS, 12 months or more, Estimated Fair Value	0
AFS, 12 months or more, Unrealized Losses	0
AFS, Total Estimated Fair Value	155,119
AFS, Total Unrealized Losses	3,504
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	48,300	49,341
AFS, Less than 12 months, Unrealized Losses	1,836	494
AFS, 12 months or more, Estimated Fair Value	0	0
AFS, 12 months or more, Unrealized Losses	0	0
AFS, Total Estimated Fair Value	48,300	49,341
AFS, Total Unrealized Losses	$ 1,836	$ 494

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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