Reporting Segments - Reconciliation of Segment Operating Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Reconciliation of segment operating income (loss) to net income (loss)
Segment operating income	$ 1,950	$ 51,887
General and administrative expense	(17,610)	(23,653)
Unit-based compensation expense	(1,351)	(1,938)
Interest expense, net	(39,789)	(10,961)
Other income	5,860	546
Income tax expense	(202)	(190)
Net income (loss)	(51,142)	15,691
Production
Reconciliation of segment operating income (loss) to net income (loss)
Segment operating income	92	14,301
Midstream
Reconciliation of segment operating income (loss) to net income (loss)
Segment operating income	$ 1,858	$ 37,586