Quarterly report pursuant to Section 13 or 15(d)

Derivative Contracts - Derivative Gains (Losses) (Details)

v3.7.0.1
Derivative Contracts - Derivative Gains (Losses) (Details) - Not Designated as Hedging Instrument - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative gain (loss) $ 4,037 $ (1,423)
Common Stock options/warrants    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative gain (loss) (955) (986)
Notes    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative gain (loss) 4,945 (138)
Forward contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative gain (loss) $ 47 $ (299)