Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Options) (Details)

v3.5.0.2
Stock-Based Compensation (Options) (Details) - Stock Options - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2016
Mar. 31, 2016
Jun. 30, 2016
Dec. 31, 2015
Options        
Outstanding at the beginning of the period (in shares) 3,448,439 3,533,791 3,533,791  
Granted (in shares) 55,719 105,645    
Exercised (in shares) (96,068) (152,220)    
Forfeited (in shares) (24,191) (38,777)    
Outstanding at the end of the period (in shares) 3,383,899 3,448,439 3,383,899 3,533,791
Options exercisable (in shares) 3,013,963   3,013,963  
Weighted-Average Exercise Price        
Outstanding at the beginning of the period (in dollars per share) $ 15.27 $ 15.03 $ 15.03  
Granted (in dollars per share) 31.03 20.51    
Exercised (in dollars per share) 11.17 7.93    
Forfeited (in dollars per share) 33.35 35.93    
Outstanding at the end of the period (in dollars per share) 15.43 $ 15.27 15.43 $ 15.03
Options exercisable (in dollars per share) $ 13.00   $ 13.00  
Weighted-Average Remaining Contractual Life        
Outstanding 4 years 6 months 4 years 8 months 12 days   4 years 8 months 12 days
Options exercisable     4 years  
Aggregate Intrinsic Value        
Outstanding (in dollars) $ 67,219 $ 50,987 $ 67,219 $ 61,199
Options exercisable (in dollars) 65,437   65,437  
Additional disclosures        
Unrecognized stock-based compensation expense related to unvested stock options $ 4,265   $ 4,265  
Unrecognized compensation expense weighted-average recognition period     2 years 1 month 6 days  
Minimum        
Additional disclosures        
Exercise prices of stock options outstanding (in dollars per share) $ 0.11   $ 0.11  
Maximum        
Additional disclosures        
Exercise prices of stock options outstanding (in dollars per share) $ 55.29   $ 55.29