Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - Restricted Stock Units (Details)

v3.20.2
Stock-Based Compensation - Restricted Stock Units (Details)
$ / shares in Units, $ in Thousands
9 Months Ended
Sep. 30, 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 956,494
Vested (in shares) | shares (677,129)
Forfeited (in shares) | shares (120,421)
Balance at the end of the period (in shares) | shares 1,477,814
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 74.55
Vested (in dollars per share) | $ / shares 57.51
Forfeited (in dollars per share) | $ / shares 61.04
Balance at the end of the period (in dollars per share) | $ / shares $ 69.48
Share-based Compensation Arrangement by Share-based Payment Award, Additional General Disclosures [Abstract]  
Unrecognized compensation expense related to shares | $ $ 85,651
Unrecognized compensation expense weighted-average recognition period 2 years
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 | $ $ 11,153
Unrecognized compensation expense weighted-average recognition period 1 year 10 months 24 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%