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Stock Incentive Plan - Summary of Performance Share Activity (Details) - PSs
12 Months Ended
Dec. 31, 2020
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Outstanding at beginning of year (in shares) 122,862
Granted (in shares) 415,381
Cancelled/Forfeited/Expired (in shares) (47,799)
Outstanding at end of year (in shares) 490,444