Annual report pursuant to Section 13 and 15(d)

Derivative Contracts (Details)

v3.3.1.900
Derivative Contracts (Details) - Not Designated as Hedging Instrument - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Common stock options/warrants | Investments, net    
Derivatives, Fair Value [Line Items]    
Derivative asset, fair value $ 5,338 $ 6,314
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 23,737 65,947
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 $ 9 $ 36