Quarterly report pursuant to Section 13 or 15(d)

Derivative Contracts - Balance Sheet Component (Details)

v3.4.0.3
Derivative Contracts - Balance Sheet Component (Details) - Not Designated as Hedging Instrument - USD ($)
$ in Thousands
Mar. 31, 2016
Dec. 31, 2015
Common Stock options/warrants | Investments, net    
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value $ 4,615 $ 5,338
Embedded conversion option | 2033 Senior Notes, net of discount and estimated fair value of embedded derivatives    
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value 23,875 23,737
Forward contracts | Unrealized gains on forward contracts are recorded in Prepaid expenses and other current assets. Unrealized losses on forward contracts are recorded in Accrued expenses.    
Derivatives, Fair Value [Line Items]    
Derivative liability, fair value $ (296) $ 9