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Income Taxes - Income Tax Uncertainties (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Unrecognized tax benefits, beginning $ 182 $ 383 $ 906
Lapse of statute of limitations (159) (188) (497)
Reductions for tax positions of prior years 0 (13) 0
Settlements 0 0 (26)
Unrecognized tax benefits, ending $ 23 $ 182 $ 383