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Summary of Significant Accounting Policies - Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]          
Effective tax rate 19.50% 23.90% 28.00% 7.90% 18.30%
Federal tax rate 21.00% 21.00% 21.00% 21.00% 21.00%
Deferred tax assets $ 9,900