Quarterly report pursuant to Section 13 or 15(d)

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

v3.4.0.3
Stock-based Compensation Plans and Awards - Narrative (Details)
$ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2015
performance_period
Mar. 31, 2016
USD ($)
shares
Mar. 31, 2015
USD ($)
shares
Dec. 31, 2015
Stock-based Compensation Plans and Awards        
Stock-based compensation expense   $ 38,655 $ 23,195  
Executive severance        
Stock-based Compensation Plans and Awards        
Stock-based compensation expense   $ 6,800    
Employee stock        
Stock-based Compensation Plans and Awards        
Percentage of eligible compensation to purchase common stock through payroll deductions (as a percent)   15.00%    
Offering period   6 months    
Contributions from employees withheld   $ 1,700 1,600  
Stock-based compensation expense   $ 600 $ 600  
Common stock issued (in shares) | shares   611,348 282,966  
Stock options        
Stock-based Compensation Plans and Awards        
Stock-based compensation expense   $ 6,800 $ 2,900  
Options granted (in shares) | shares   0 0  
Restricted stock units        
Stock-based Compensation Plans and Awards        
Stock-based compensation expense   $ 31,000 $ 19,600  
Vesting period   4 years    
Market stock units        
Stock-based Compensation Plans and Awards        
Stock-based compensation expense   $ 200 $ 100  
Number of performance periods | performance_period 3      
Total stockholder return, duration period 90 days      
Performance multiplier, percentage point decrease 3.00%      
Performance multiplier, percentage point increase 2.00%      
Percentage decline, TSR       26.00%
Grants in period (in shares) | shares   0 776,000  
Grant-date fair value     $ 4,300  
Market stock units | One-Year Performance Period        
Stock-based Compensation Plans and Awards        
Vesting percent 33.33%     22.00%
Market stock units | Two-Year Performance Period        
Stock-based Compensation Plans and Awards        
Vesting percent 33.33%      
Market stock units | Maximum | One and Two-Year Performance Period        
Stock-based Compensation Plans and Awards        
Performance multiplier 100.00%      
Market stock units | Maximum | Three-Year Performance Period        
Stock-based Compensation Plans and Awards        
Performance multiplier 200.00%