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Shareholders' Equity - Share-based Compensation, Activity (Details) - $ / shares
shares in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Restricted Stock Units (RSUs)      
Awards Other Than Options, Number of Shares [Roll Forward]      
Outstanding at January 1 (in shares) 3,792 5,620 1,741
Granted (in shares) 3,431 2,677 7,778
Vested (in shares) (3,238) (3,117) (2,816)
Cancelled (in shares) (820) (1,388) (1,083)
Outstanding at December 31 (in shares) 3,165 3,792 5,620
Awards Other Than Options, Weighted Average Grant Date Fair Value [Roll Forward]      
Outstanding at January 1 (in dollars per share) $ 4.57 $ 3.49 $ 13.07
Granted (in dollars per share) 5.15 6.65 2.25
Vested (in dollars per share) 4.38 4.69 4.99
Cancelled (in dollars per share) 4.56 3.96 6.11
Outstanding at December 31 (in dollars per share) $ 5.39 $ 4.57 $ 3.49
Performance Shares      
Awards Other Than Options, Number of Shares [Roll Forward]      
Outstanding at January 1 (in shares) 3,609 5,453 3,597
Granted (in shares) 2,186 1,545 7,010
Vested (in shares) (1,688) (1,945) (3,163)
Cancelled (in shares) (1,010) (1,444) (1,991)
Outstanding at December 31 (in shares) 3,097 3,609 5,453
Awards Other Than Options, Weighted Average Grant Date Fair Value [Roll Forward]      
Outstanding at January 1 (in dollars per share) $ 4.71 $ 3.83 $ 16.17
Granted (in dollars per share) 4.80 6.54 1.37
Vested (in dollars per share) 2.02 3.37 7.33
Cancelled (in dollars per share) 8.02 5.13 11.91
Outstanding at December 31 (in dollars per share) $ 0 $ 4.71 $ 3.83
Deferred Compensation, Share-based Payments      
Share-based Compensation Arrangement by Share-based Payment Award Other Than Options [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number 312