Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation Plans and Awards - ESPP Narrative (Details)

v3.10.0.1
Stock-based Compensation Plans and Awards - ESPP Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 27,528 $ 38,608 $ 53,964 $ 68,226
ESPP        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percentage of eligible compensation to purchase common stock through payroll deductions (as a percent) 15.00%   15.00%  
Offering period     6 months  
Contributions from employees withheld $ 2,200 3,300 $ 3,600 6,100
Stock-based compensation expense $ 800 $ 1,000 $ 1,600 $ 1,900
Common stock issued (in shares) 0 0 795,990 547,765