Investment Securities - Schedule of Debt Securities Expected Maturity (Details) - USD ($) $ in Thousands		Dec. 31, 2021	Dec. 31, 2020
Amortized Cost
Due within 1 year		$ 908
Due after 1 but within 5 years		7,610
Due after 5 but within 10 years		43,226
Due after 10 years		562
Amortized Cost		52,306
Debt Securities, Held-to-maturity		541,311	$ 361,844
Estimated Fair Value
Due within 1 year		918
Due after 1 but within 5 years		7,653
Due after 5 but within 10 years		42,846
Due after 10 years		572
Estimated Fair Value		51,989
Debt Securities, Held-to-maturity, Fair Value		536,651	$ 369,851
Mortgage-Backed Securities [Member]
Amortized Cost
Debt Securities, Held-to-maturity	[1]	489,005
Estimated Fair Value
Debt Securities, Held-to-maturity, Fair Value	[1]	484,662
Mortgage-Backed Securities [Member] | US Government Agencies Debt Securities [Member]
Amortized Cost
Debt Securities, Held-to-maturity		93,800
Estimated Fair Value
Debt Securities, Held-to-maturity, Fair Value		92,300
Mortgage-Backed Securities [Member] | Obligations of U.S. Government-Sponsored Enterprises [Member]
Amortized Cost
Debt Securities, Held-to-maturity		395,200
Estimated Fair Value
Debt Securities, Held-to-maturity, Fair Value		$ 392,300

[1] Mortgage Backed Securities include an amortized cost of $93.8 million and a fair value of $92.3 million for Obligations of U.S. Government agencies issued by Ginnie Mae and an amortized cost of $395.2 million and a fair value of $392.3 million for Obligations of U.S. Government-sponsored enterprises issued by Fannie Mae and Freddie Mac.