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	Jun. 30, 2022	Dec. 31, 2021
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Available for sale securities, Fair Value, Less than 12 months	$ 89,317	$ 80,365
Available for sale securities, Unrealized Losses, Less than 12 months	(5,938)	(2,371)
Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer, Total	83,184	52,755
Available for sale securities, Unrealized Losses, 12 months or longer	(14,147)	(2,325)
Available for sale securities, Fair Value	172,501	133,120
Available for sale securities, Unrealized Losses	(20,085)	(4,696)
Held to maturity securities, Fair Value, Less than 12 months	852,240	753,573
Held to maturity securities, Unrealized Losses, Less than 12 months	(98,104)	(12,703)
Held to maturity securities, Fair Value, 12 months or longer	94,216	21,061
Held to maturity securities, Unrealized Losses, 12 months or longer	(17,862)	(1,071)
Held to maturity securities, Fair Value	946,456	774,634
Held to maturity securities, Unrealized Losses	(115,966)	(13,774)
Fair Value, Less than 12 months	941,557	833,938
Unrealized Losses, Less than 12 months	104,042	(15,074)
Fair Value, 12 months or longer	177,400	73,816
Unrealized Losses, 12 months or longer	32,009	(3,396)
Fair Value	1,118,957	907,754
Unrealized Losses	136,051	(18,470)
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	11,830	4,881
Available for sale securities, Unrealized Losses, Less than 12 months	(1,170)	(115)
Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer, Total	9,245	4,884
Available for sale securities, Unrealized Losses, 12 months or longer	(752)	(116)
Available for sale securities, Fair Value	21,075	9,765
Available for sale securities, Unrealized Losses	(1,922)	(231)
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	77,487	74,724
Available for sale securities, Unrealized Losses, Less than 12 months	(4,768)	(2,253)
Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer, Total	73,190	47,871
Available for sale securities, Unrealized Losses, 12 months or longer	(13,389)	(2,209)
Available for sale securities, Fair Value	150,677	122,595
Available for sale securities, Unrealized Losses	(18,157)	(4,462)
Held to maturity securities, Fair Value, Less than 12 months	806,188	740,966
Held to maturity securities, Unrealized Losses, Less than 12 months	(91,491)	(12,509)
Held to maturity securities, Fair Value, 12 months or longer	88,138	15,345
Held to maturity securities, Unrealized Losses, 12 months or longer	(15,818)	(749)
Held to maturity securities, Fair Value	894,326	756,311
Held to maturity securities, Unrealized Losses	(107,309)	(13,258)
Corporate Debt Securities
Schedule of Available for Sale Securities and Held to Maturity Securities [Line Items]
Available for sale securities, Fair Value, Less than 12 months		760
Available for sale securities, Unrealized Losses, Less than 12 months		(3)
Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer, Total	749
Available for sale securities, Unrealized Losses, 12 months or longer	(6)
Available for sale securities, Fair Value	749	760
Available for sale securities, Unrealized Losses	(6)	(3)
Held to maturity securities, Fair Value, Less than 12 months	245
Held to maturity securities, Unrealized Losses, Less than 12 months	(5)
Held to maturity securities, Fair Value	245
Held to maturity securities, Unrealized Losses	(5)
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	45,807	12,607
Held to maturity securities, Unrealized Losses, Less than 12 months	(6,608)	(194)
Held to maturity securities, Fair Value, 12 months or longer	6,078	5,716
Held to maturity securities, Unrealized Losses, 12 months or longer	(2,044)	(322)
Held to maturity securities, Fair Value	51,885	18,323
Held to maturity securities, Unrealized Losses	$ (8,652)	$ (516)