Investment in Securities - Schedule of Investment Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Marketable Securities [Line Items]
Amortized Cost	$ 791,927	$ 664,271
Gross Unrealized Gains	1,129	13,138
Gross Unrealized Losses	52,982	3,956
Fair Value	740,074	673,453
AFS, Less than 12 months, Estimated Fair Value	571,177	328,196
AFS, Less than 12 months, Unrealized Losses	50,380	3,956
AFS, 12 months or more, Estimated Fair Value	15,095	0
AFS, 12 months or more, Unrealized Losses	2,602	0
Debt Securities, Available-for-sale, Unrealized Loss Position	586,272	328,196
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	52,982	3,956
State and political subdivisions
Marketable Securities [Line Items]
Amortized Cost	338,618	359,187
Gross Unrealized Gains	1,125	12,931
Gross Unrealized Losses	18,358	990
Fair Value	321,385	371,128
AFS, Less than 12 months, Estimated Fair Value	177,339	60,083
AFS, Less than 12 months, Unrealized Losses	18,358	990
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	177,339	60,083
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	18,358	990
Mortgage-backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises
Marketable Securities [Line Items]
Amortized Cost	205,229	170,711
Gross Unrealized Gains	4	135
Gross Unrealized Losses	21,725	2,200
Fair Value	183,508	168,646
AFS, Less than 12 months, Estimated Fair Value	163,657	163,652
AFS, Less than 12 months, Unrealized Losses	19,123	2,200
AFS, 12 months or more, Estimated Fair Value	15,095	0
AFS, 12 months or more, Unrealized Losses	2,602	0
Debt Securities, Available-for-sale, Unrealized Loss Position	178,752	163,652
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	21,725	2,200
Corporate bonds
Marketable Securities [Line Items]
Amortized Cost	96,460	84,538
Gross Unrealized Gains	0	72
Gross Unrealized Losses	9,686	272
Fair Value	86,774	84,338
AFS, Less than 12 months, Estimated Fair Value	81,774	55,120
AFS, Less than 12 months, Unrealized Losses	9,686	272
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	81,774	55,120
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	9,686	272
U.S. treasury bonds
Marketable Securities [Line Items]
Amortized Cost	99,516
Gross Unrealized Gains	0
Gross Unrealized Losses	954
Fair Value	98,562
Asset backed securities issued or guaranteed by U.S. government agencies or sponsored enterprises
Marketable Securities [Line Items]
Amortized Cost	52,104	49,835
Gross Unrealized Gains	0	0
Gross Unrealized Losses	2,259	494
Fair Value	49,845	49,341
AFS, Less than 12 months, Estimated Fair Value	49,845	49,341
AFS, Less than 12 months, Unrealized Losses	2,259	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	49,845	49,341
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss	$ 2,259	$ 494

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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