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Stock-Based Compensation - Restricted Stock Awards Activity (Details) - $ / shares
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Restricted Stock Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
TSR performance metric, payout percent 200.00%  
Shares    
Non-vested beginning balance (in shares) 646,619 511,409
Granted (in shares) 183,175 360,362
TSR and other adjustments (in shares) 164,071 0
Vested (in shares) (286,753) (123,519)
Forfeited (in shares) (81,925) (2,691)
Non-vested ending balance (in shares) 625,187 745,561
Weighted Average Grant Date Fair Value    
Non-vested beginning balance (in dollars per share) $ 54.34 $ 56.23
Granted (in dollars per share) 78.80 47.97
TSR and other adjustments (in dollars per share) 115.23 0
Vested (in dollars per share) 85.47 44.87
Forfeited (in dollars per share) 48.39 49.69
Non-vested ending balance (in dollars per share) $ 59.23 $ 54.14
Restricted Stock    
Shares    
Non-vested beginning balance (in shares) 16,681 419,356
Granted (in shares) 0 16,681
Vested (in shares) (16,681) (364,822)
Forfeited (in shares) 0 (34,603)
Non-vested ending balance (in shares) 0 36,612
Weighted Average Grant Date Fair Value    
Non-vested beginning balance (in dollars per share) $ 52.46 $ 35.73
Granted (in dollars per share) 0 52.46
Vested (in dollars per share) 52.46 35.23
Forfeited (in dollars per share) 0 37.09
Non-vested ending balance (in dollars per share) $ 0 $ 47.02
Restricted Stock Units, Time-Based    
Shares    
Non-vested ending balance (in shares) 303,915 359,400
Weighted Average Grant Date Fair Value    
Non-vested ending balance (in dollars per share) $ 59.65 $ 53.12
Restricted Stock Units, Performance-Based    
Shares    
Non-vested ending balance (in shares) 321,272 386,161
Weighted Average Grant Date Fair Value    
Non-vested ending balance (in dollars per share) $ 58.83 $ 55.08
Restricted Stock, Time-Based    
Shares    
Non-vested ending balance (in shares) 0 36,612
Weighted Average Grant Date Fair Value    
Non-vested ending balance (in dollars per share) $ 0 $ 47.02
Restricted Stock, Performance-Based    
Shares    
Non-vested ending balance (in shares) 0 0
Weighted Average Grant Date Fair Value    
Non-vested ending balance (in dollars per share) $ 0 $ 0