Quarterly report pursuant to Section 13 or 15(d)

Debt (Conv) (Details)

v3.3.0.814
Debt (Conv) (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended
Dec. 15, 2014
USD ($)
item
$ / shares
Sep. 30, 2015
USD ($)
$ / shares
Sep. 30, 2015
USD ($)
$ / shares
Dec. 31, 2014
USD ($)
Debt        
Accretion of debt discount     $ 7,081  
Convertible Notes        
Debt        
Face amount $ 172,500      
Net proceeds from offering $ 166,967      
Interest rate (as a percent) 1.75%      
Repurchase percentage of principal (as a percent) 100.00%      
Conversion rate 0.0159022      
Principal amount $ 1      
Conversion price (in dollars per share) | $ / shares $ 62.88 $ 62.88 $ 62.88  
Threshold trading days (in days) | item 20      
Consecutive trading days 30 days      
Threshold percentage of stock price trigger (as a percent) 130.00%      
Threshold business days 5 days      
Threshold consecutive trading-day period 5 days      
Threshold percentage of trading price trigger (as a percent) 98.00%      
Allocated to equity components $ 26,618      
Offering costs 882      
Discount 27,500 $ 23,623 $ 23,623 $ 27,297
Accretion of debt discount   $ 1,258 $ 3,682  
Effective interest rate on the liability component (as a percent)   6.00% 6.00%  
Convertible Notes | Other non-current assets        
Debt        
Issuance costs $ 4,651