Quarterly report pursuant to Section 13 or 15(d)

Derivative Contracts - Derivative Gains (Losses) (Details)

v3.8.0.1
Derivative Contracts - Derivative Gains (Losses) (Details) - Not Designated as Hedging Instrument - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative gain (loss) $ (7,550) $ (5,701) $ 1,969 $ (5,889)
Common Stock options/warrants        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative gain (loss) (342) (12) (854) (4,728)
Notes        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative gain (loss) (6,829) (5,795) 3,185 (1,061)
Forward contracts        
Derivative Instruments, Gain (Loss) [Line Items]        
Derivative gain (loss) $ (379) $ 106 $ (362) $ (100)