Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments - Gain (Loss) on Derivatives (Details)

v3.10.0.1
Derivative Instruments - Gain (Loss) on Derivatives (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Realized gain (loss) on derivatives        
Realized gain (loss) on derivatives $ (4,999) $ 472 $ (17,193) $ 162
Total realized gain (loss) on derivatives (4,999) 478 (17,193) 19
Unrealized gain (loss) on derivatives        
Unrealized gain (loss) on derivatives (62,315) (1,923) (91,360) 1,589
Total unrealized gain (loss) on derivatives (62,419) (1,923) (91,307) 1,363
Commodity derivative options        
Realized gain (loss) on derivatives        
Realized gain (loss) on derivatives 0 18 19 172
Unrealized gain (loss) on derivatives        
Unrealized gain (loss) on derivatives (45,349) 55 (59,514) 361
Commodity derivative swaps        
Realized gain (loss) on derivatives        
Realized gain (loss) on derivatives (4,999) 454 (17,212) (10)
Unrealized gain (loss) on derivatives        
Unrealized gain (loss) on derivatives (16,966) (1,978) (31,846) 1,228
Interest rate swap        
Realized gain (loss) on derivatives        
Total realized gain (loss) on derivatives 0 6 0 (143)
Unrealized gain (loss) on derivatives        
Total unrealized gain (loss) on derivatives 0 0 0 (226)
Series B Preferred Stock bifurcated derivative        
Unrealized gain (loss) on derivatives        
Total unrealized gain (loss) on derivatives $ (104) $ 0 $ 53 $ 0