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Stock Plans and Share-Based Compensation - Performance Unit Activity Related to Outstanding Long-term Incentive Plans and Corresponding Fair Value (Details) - Performance Units
shares in Thousands
12 Months Ended
Dec. 31, 2021
$ / shares
shares
Weighted-Average Fair Value at Grant Date  
Unvested at December 31, 2020 (in dollars per share) $ 25.39
Unvested at December 31, 2021 (in dollars per share) $ 30.11
Long-term Incentive Plans  
Units Outstanding  
Unvested at December 31, 2020 (in shares) | shares 1,920
Granted (in shares) | shares 597
Forfeited (in shares) | shares (59)
Vested (in shares) | shares (882)
Unvested at December 31, 2021 (in shares) | shares 1,576
Weighted-Average Fair Value at Grant Date  
Unvested at December 31, 2020 (in dollars per share) $ 23.86
Granted (in dollars per share) 30.11
Forfeited (in dollars per share) 24.30
Vested (in dollars per share) 22.09
Unvested at December 31, 2021 (in dollars per share) $ 27.21