Derivative Financial Instruments (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Summary of location and aggregate fair value of all derivative financial instruments recorded in the consolidated statements of operations
Realized (loss) gain on derivatives	$ (5,406)	$ 3,346	$ 49,571	$ 7,781
Unrealized (loss) gain on derivatives	(13,033)	9,847	(9,271)	(29,715)
Total	(18,439)	13,193	40,300	(21,934)
Revenues
Summary of location and aggregate fair value of all derivative financial instruments recorded in the consolidated statements of operations
Realized (loss) gain on derivatives	(5,406)	3,346	49,571	7,781
Unrealized (loss) gain on derivatives	(13,033)	9,847	(9,271)	(29,715)
Oil | Revenues
Summary of location and aggregate fair value of all derivative financial instruments recorded in the consolidated statements of operations
Realized (loss) gain on derivatives	(5,406)	2,856	49,571	7,387
Unrealized (loss) gain on derivatives	(9,843)	10,379	(7,980)	(29,699)
Natural Gas | Revenues
Summary of location and aggregate fair value of all derivative financial instruments recorded in the consolidated statements of operations
Realized (loss) gain on derivatives	0	490	0	394
Unrealized (loss) gain on derivatives	$ (3,190)	$ (532)	$ (1,291)	$ (16)