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Stock-Based Compensation - Summary of Restricted Stock Units (Details)
12 Months Ended
Dec. 31, 2020
$ / shares
shares
Time-Based Restricted Stock Units [Member]  
Unvested, Shares [Roll Forward]  
Unvested Shares, beginning of period (in shares) | shares 1,151,251
Unvested Shares, Awarded (in shares) | shares 569,500
Unvested Shares, Vested (in shares) | shares (442,688)
Unvested Shares , Forfeited/cancelled (in shares) | shares (75,312)
Unvested Shares, end of period (in shares) | shares 1,202,751
Unvested, Weighted-Average Grant-Date Fair Value [Roll Forward]  
Weighted Average Grant-Date Fair Value, beginning of the period | $ / shares $ 74.39
Weighted Average Grant-Date Fair Value, Awarded | $ / shares 64.30
Weighted Average Grant-Date Fair Value, Vested | $ / shares 70.97
Weighted Average Grant-Date Fair Value, Forfeited/cancelled | $ / shares 69.15
Weighted Average Grant-Date Fair Value, ending of the period | $ / shares $ 71.30
Performance-Based Restricted Stock Units [Member]  
Unvested, Shares [Roll Forward]  
Unvested Shares, beginning of period (in shares) | shares 208,335
Unvested Shares, Awarded (in shares) | shares 148,333
Unvested Shares, Vested (in shares) | shares (47,291)
Unvested Shares , Forfeited/cancelled (in shares) | shares (7,708)
Unvested Shares, end of period (in shares) | shares 301,669
Unvested, Weighted-Average Grant-Date Fair Value [Roll Forward]  
Weighted Average Grant-Date Fair Value, beginning of the period | $ / shares $ 76.82
Weighted Average Grant-Date Fair Value, Awarded | $ / shares 102.83
Weighted Average Grant-Date Fair Value, Vested | $ / shares 71.18
Weighted Average Grant-Date Fair Value, Forfeited/cancelled | $ / shares 75.41
Weighted Average Grant-Date Fair Value, ending of the period | $ / shares $ 90.53