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Stock-Based Compensation - Summary of RSUs and PSUs to be Settled in Common Stock Activity (Details) - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Restricted Stock and RSUs to be Settled in Common Stock      
Shares      
Unvested, shares, beginning of period (in shares) 3,869 3,265 2,634
Shares granted (in shares) 1,642 2,029 2,142
Vested, shares (in shares) (1,476) (1,269) (1,349)
Forfeited, shares (in shares) (155) (156) (162)
Unvested, shares, end of period (in shares) 3,880 3,869 3,265
Weighted Average Grant Date Fair Value (Per share)      
Unvested, weighted average grant date fair value, beginning of period (in usd per share) $ 37.57 $ 35.34 $ 33.50
Weighted average grant date fair value (in dollars per share) 94.83 39.91 35.62
Vested, weighted average grant date fair value (in usd per share) 37.03 35.69 32.22
Forfeited, weighted average grant date fair value (in usd per share) 48.52 36.67 35.20
Unvested, weighted average grant date fair value, end of period (in usd per share) $ 61.64 $ 37.57 $ 35.34
PSUs      
Shares      
Unvested, shares, beginning of period (in shares) 1,047 848 775
Shares granted (in shares) 174 437 358
Vested, shares (in shares) (268) (238) (236)
Forfeited, shares (in shares) (22) 0 (49)
Unvested, shares, end of period (in shares) 931 1,047 848
Weighted Average Grant Date Fair Value (Per share)      
Unvested, weighted average grant date fair value, beginning of period (in usd per share) $ 37.65 $ 40.04 $ 34.72
Weighted average grant date fair value (in dollars per share) 90.44 34.60 40.15
Vested, weighted average grant date fair value (in usd per share) 38.28 41.87 22.73
Forfeited, weighted average grant date fair value (in usd per share) 41.86   40.07
Unvested, weighted average grant date fair value, end of period (in usd per share) $ 47.27 $ 37.65 $ 40.04