Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - (Narrative) (Details)

v3.19.2
Stock-Based Compensation - (Narrative) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Share-based Payment Arrangement [Abstract]        
Stock-based compensation expense $ 6,754 $ 7,929 $ 12,385 $ 13,165
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Dividend rate used     0.00%  
RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Outstanding units (in shares) 484   484  
Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost related to unvested options $ 6,000   $ 6,000  
Weighted average period for compensation cost to be recognized     1 year 3 months 18 days  
RSAs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation cost related to unvested restricted shares $ 24,000   $ 24,000  
Weighted average period for compensation cost to be recognized     2 years 2 months 12 days  
Series B common stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of options granted (in shares)     22  
Shares reserved for issuance upon exercise 1,200   1,200  
Series A common stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of options granted (in shares)     0  
Shares reserved for issuance upon exercise 1,400   1,400  
CEO | Series B common stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of options granted (in shares)     22  
Options, weighted average GDFV (in dollars per share)     $ 18.27  
CEO | Series B common stock | RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of units granted (in shares)     51  
Granted shares, weighted average GDFV (in dollars per share)     $ 53.78  
Award vesting period     1 year