Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Restricted Stock (Details)

v3.20.1
Stock-Based Compensation - Restricted Stock (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2020
USD ($)
$ / shares
shares
RSUs  
Number of Shares  
Balance at the beginning of the period (in shares) | shares 1,318,870
Granted (in shares) | shares 907,042
Vested (in shares) | shares (398,881)
Forfeited (in shares) | shares (41,175)
Balance at the end of the period (in shares) | shares 1,785,856
Weighted-Average Grant Date Fair Value per Share  
Balance at the beginning of the period (in dollars per share) | $ / shares $ 58.88
Granted (in dollars per share) | $ / shares 75.53
Vested (in dollars per share) | $ / shares 55.93
Forfeited (in dollars per share) | $ / shares 59.74
Balance at the end of the period (in dollars per share) | $ / shares $ 67.98
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]  
Unrecognized compensation expense related to shares | $ $ 112,196
Unrecognized compensation expense weighted-average recognition period 2 years 4 months 24 days
PSUs  
Stock-Based compensation  
Vesting period 3 years
Number of Shares  
Balance at the beginning of the period (in shares) | shares 254,118
Granted (in shares) | shares 67,793
Vested (in shares) | shares 0
Forfeited (in shares) | shares (33,010)
Balance at the end of the period (in shares) | shares 288,901
Weighted-Average Grant Date Fair Value per Share  
Balance at the beginning of the period (in dollars per share) | $ / shares $ 67.96
Granted (in dollars per share) | $ / shares 81.42
Vested (in dollars per share) | $ / shares 0
Forfeited (in dollars per share) | $ / shares 64.70
Balance at the end of the period (in dollars per share) | $ / shares $ 71.49
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]  
Unrecognized compensation expense related to shares | $ $ 14,656
Unrecognized compensation expense weighted-average recognition period 2 years 3 months 18 days
PSUs | Minimum  
Stock-Based compensation  
Number of shares to be vest upon each evaluation date, percentage 50.00%
PSUs | Maximum  
Stock-Based compensation  
Number of shares to be vest upon each evaluation date, percentage 150.00%