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Investment Securities - Scheduled Maturities of Investment Securities Available-for-Sale and Held-to-Maturity (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Investments Debt And Equity Securities [Abstract]
Available-for-sale, maturing within one year, amortized cost	$ 2,592
Available-for-sale, maturing after one to five years, amortized cost	38,838
Available-for-sale, maturing after five to ten years, amortized cost	77,858
Available-for-sale, maturing after ten years, amortized cost	20,226
Available-for-sale, amortized cost	139,514	$ 130,676
Available-for-sale, maturing within one year, estimated fair value	2,600
Available-for-sale, maturing after one to five years, estimated fair value	37,355
Available-for-sale, maturing after five to ten years, estimated fair value	75,029
Available-for-sale, maturing after ten years, estimated fair value	20,034
Available-for-sale, amortized cost	135,018	130,883
Held-to-maturity, maturing after five to ten years, amortized cost	1,553
Held-to-maturity, maturing after ten years, amortized cost	1,165
Held-to-maturity, amortized cost	2,718	3,436
Held-to-maturity, maturity after five to ten years, estimated fair value	1,546
Held-to-maturity, maturing after ten years, estimated fair value	1,140
Held-to-maturity, amortized cost	$ 2,686	$ 3,477

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