Loans and Allowance for Loan Losses - Summary of Allowance for Loan Losses and Recorded Investment in Loans by Portfolio Segment and Based on Impairment Method (Parenthetical) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses	$ 8,806	$ 8,559	$ 6,361
Paycheck Protection Program Loans
Financing Receivable Allowance For Credit Losses [Line Items]
Allowance for loan losses	$ 0	$ 0