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Investment Securities - Summary of Contractual Maturities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Mar. 31, 2021
Securities available for sale
Amortized Cost, Due in 1 year or less	$ 25	$ 0	$ 2,544
Fair Value (Estimated), Due in 1 year or less	25	0	2,516
Amortized Cost, Due in 1 to 5 years	3,723	5,004	12,994
Fair Value (Estimated), Due in 1 to 5 years	3,668	5,173	13,172
Amortized Cost, Due in 5 to 10 years	16,674	52,782	50,007
Fair Value (Estimated), Due in 1 to 5 years	14,939	53,057	50,587
Amortized Cost, Due after 10 years	317,986	264,955	228,715
Fair Value (Estimated), Due after 10 years	294,383	262,336	228,262
Amortized Cost	338,408	322,741	294,260
Fair Value (Estimated)	313,015	320,566	294,537
Securities to be held to maturity
Amortized Cost, Due in 1 year or less	2,388	2,515	3,926
Fair Value (Estimated), Due in 1 year or less	2,392	2,521	3,956
Amortized Cost, Due in 1 to 5 years	12,877	17,624	26,992
Fair Value (Estimated), Due in 1 to 5 years	12,831	18,338	27,613
Amortized Cost, Due in 5 to 10 years	67,056	174,982	173,295
Fair Value (Estimated), Due in 1 to 5 years	65,943	180,081	178,069
Amortized Cost, Due after 10 years	294,862	174,919	181,139
Fair Value (Estimated), Due after 10 years	272,025	174,387	179,198
Amortized Cost	377,183	370,040	385,352
Securities to be held to maturity, Fair Value (Estimated)	$ 353,191	$ 375,327	$ 388,836

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