Quarterly report pursuant to Section 13 or 15(d)

Debt (Details 3)

v3.2.0.727
Debt (Details 3)
$ / shares in Units, $ in Thousands
 3 Months Ended 6 Months Ended
Dec. 15, 2014
USD ($)
item
$ / shares
Jun. 30, 2015
USD ($)
$ / shares
Jun. 30, 2015
USD ($)
$ / shares
Mar. 31, 2015
$ / shares
Dec. 31, 2014
USD ($)
$ / shares
Debt          
Discount   $ 4,184 $ 4,184   $ 4,612
Accretion of debt discount     4,697    
Unsecured debt | Convertible Notes          
Debt          
Face amount $ 172,500        
Face amount and over-allotment amounts   $ 172,500 $ 172,500   $ 172,500
Interest rate (as a percent) 1.75% 1.75% 1.75%   1.75%
Net proceeds from offering $ 166,967        
Repurchase percentage of principal (as a percent) 100.00%        
Conversion rate 0.0159022        
Conversion price (in dollars per share) | $ / shares $ 62.88 $ 62.88 $ 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 $ 24,873 $ 24,873   $ 27,297
Accretion of debt discount   $ 1,214 $ 2,424    
Effective interest rate on the liability component (as a percent)   6.00% 6.00%    
Unsecured debt | Convertible Notes | Other non-current assets          
Debt          
Issuance costs $ 4,651