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Equity Compensation - Performance Share Activity (Details) - Performance shares and performance share units - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Stock / Units unvested at beginning of period (in shares) 1,026,785 753,272 448,294
Granted (in shares) 471,819 523,329 576,737
Vested (in shares) 0 (183,840) (255,259)
Canceled (in shares) (526,316) (65,976) (16,500)
Stock / Units unvested at end of period (in shares) 972,288 1,026,785 753,272
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]      
Stock / Units unvested at beginning of period - Weighted Average Fair Value (in dollars per share) $ 8.55 $ 11.82 $ 14.39
Granted - Weighted Average Fair Value (in dollars per share) 8.49 7.82 9.93
Vested - Weighted Average Fair Value (in dollars per share) 0 17.48 12.02
Canceled - Weighted Average Fair Value (in dollars per share) 9.25 9.48 11.99
Stock / Units unvested at end of period - Weighted Average Fair Value (in dollars per share) $ 7.76 $ 8.55 $ 11.82