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Stock-Based Compensation - Activity for Cash-Settled RSUs (Details) - Cash Settled RSUs
shares in Thousands
12 Months Ended
Dec. 31, 2020
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares  
Shares Outstanding Beginning Balance | shares 0
Shares Granted | shares 68
Shares Outstanding Ending Balance | shares 68
Weighted Average Grant Date Fair Value at Beginning of Period | $ / shares $ 0
Weighted Average Grant Date Fair Value of Shares Granted | $ / shares 22.94
Weighted Average Grant Date Fair Value at End of Period | $ / shares $ 22.94