Investment in Securities - Schedule of Investment Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2022	Dec. 31, 2021
Marketable Securities [Line Items]
Amortized Cost	$ 841,781	$ 664,271
Gross Unrealized Gains	18	13,138
Gross Unrealized Losses	78,010	3,956
Fair Value	763,789	673,453
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
Debt Securities, Available-for-sale, Unrealized Loss Position	737,111	328,196
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	78,010	3,956
State and political subdivisions
Marketable Securities [Line Items]
Amortized Cost	326,506	359,187
Gross Unrealized Gains	18	12,931
Gross Unrealized Losses	28,078	990
Fair Value	298,446	371,128
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
Debt Securities, Available-for-sale, Unrealized Loss Position	276,768	60,083
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	28,078	990
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises
Marketable Securities [Line Items]
Amortized Cost	210,111	170,711
Gross Unrealized Gains	0	135
Gross Unrealized Losses	31,978	2,200
Fair Value	178,133	168,646
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
Debt Securities, Available-for-sale, Unrealized Loss Position	178,133	163,652
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	31,978	2,200
Corporate bonds
Marketable Securities [Line Items]
Amortized Cost	96,405	84,538
Gross Unrealized Gains	0	72
Gross Unrealized Losses	12,614	272
Fair Value	83,791	84,338
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
Debt Securities, Available-for-sale, Unrealized Loss Position	78,791	55,120
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	12,614	272
U.S. treasury bonds
Marketable Securities [Line Items]
Amortized Cost	158,623
Gross Unrealized Gains	0
Gross Unrealized Losses	3,504
Fair Value	155,119
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
Debt Securities, Available-for-sale, Unrealized Loss Position	155,119
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	3,504
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises
Marketable Securities [Line Items]
Amortized Cost	50,136	49,835
Gross Unrealized Gains	0	0
Gross Unrealized Losses	1,836	494
Fair Value	48,300	49,341
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
Debt Securities, Available-for-sale, Unrealized Loss Position	48,300	49,341
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 1,836	$ 494