Investment Securities - Gross Unrealized Losses of Aggregated by Investment Category and Length of Time that Individual Securities have been in Continuous Loss Position (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Available for sale securities, Fair Value, Less than 12 months	$ 1,807	$ 52,554
Available for sale securities, Unrealized Losses, Less than 12 months	(27)	(5,375)
Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer, Total	149,104	99,557
Available for sale securities, Unrealized Losses, 12 months or longer	(25,982)	(23,243)
Available for sale securities, Fair Value	150,911	152,111
Available for sale securities, Unrealized Losses	(26,009)	(28,618)
Held to maturity securities, Fair Value, Less than 12 months	79,196	286,872
Held to maturity securities, Unrealized Losses, Less than 12 months	(2,866)	(26,774)
Held to maturity securities, Fair Value, 12 months or longer	769,225	576,549
Held to maturity securities, Unrealized Losses, 12 months or longer	(148,806)	(139,729)
Held to maturity securities, Fair Value	848,421	863,421
Held to maturity securities, Unrealized Losses	(151,672)	(166,503)
Fair Value, Less than 12 months	81,003	339,426
Unrealized Losses, Less than 12 months	(2,893)	(32,149)
Fair Value, 12 months or longer	918,329	676,106
Unrealized Losses, 12 months or longer	(174,788)	(162,972)
Fair Value	999,332	1,015,532
Unrealized Losses	(177,681)	(195,121)
U.S. Government Sponsored Enterprise Obligations
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Available for sale securities, Fair Value, Less than 12 months		10,722
Available for sale securities, Unrealized Losses, Less than 12 months		(2,278)
Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer, Total	20,039	9,012
Available for sale securities, Unrealized Losses, 12 months or longer	(2,959)	(986)
Available for sale securities, Fair Value	20,039	19,734
Available for sale securities, Unrealized Losses	(2,959)	(3,264)
U.S. Treasury Notes
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Held to maturity securities, Fair Value, Less than 12 months	3,028	3,952
Held to maturity securities, Unrealized Losses, Less than 12 months	(9)	(18)
Held to maturity securities, Fair Value	3,028	3,952
Held to maturity securities, Unrealized Losses	(9)	(18)
Mortgage Backed Securities
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Available for sale securities, Fair Value, Less than 12 months	1,807	41,832
Available for sale securities, Unrealized Losses, Less than 12 months	(27)	(3,097)
Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer, Total	129,065	90,545
Available for sale securities, Unrealized Losses, 12 months or longer	(23,023)	(22,257)
Available for sale securities, Fair Value	130,872	132,377
Available for sale securities, Unrealized Losses	(23,050)	(25,354)
Held to maturity securities, Fair Value, Less than 12 months	57,244	230,708
Held to maturity securities, Unrealized Losses, Less than 12 months	(2,723)	(22,362)
Held to maturity securities, Fair Value, 12 months or longer	730,986	562,835
Held to maturity securities, Unrealized Losses, 12 months or longer	(140,910)	(134,846)
Held to maturity securities, Fair Value	788,230	793,543
Held to maturity securities, Unrealized Losses	(143,633)	(157,208)
Corporate Debt Securities
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Held to maturity securities, Fair Value, Less than 12 months	244	243
Held to maturity securities, Unrealized Losses, Less than 12 months	(6)	(6)
Held to maturity securities, Fair Value	244	243
Held to maturity securities, Unrealized Losses	(6)	(6)
Municipal Securities
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Held to maturity securities, Fair Value, Less than 12 months	18,680	51,969
Held to maturity securities, Unrealized Losses, Less than 12 months	(128)	(4,388)
Held to maturity securities, Fair Value, 12 months or longer	38,239	13,714
Held to maturity securities, Unrealized Losses, 12 months or longer	(7,896)	(4,883)
Held to maturity securities, Fair Value	56,919	65,683
Held to maturity securities, Unrealized Losses	$ (8,024)	$ (9,271)