Revenues - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue
Total revenues	$ 16,655	$ 75,388	$ 56,984	$ 148,624
Oil
Disaggregation of Revenue
Total revenues	11,554	55,615	40,208	98,774
NGL
Disaggregation of Revenue
Total revenues	1,591	9,413	7,525	22,524
Natural gas
Disaggregation of Revenue
Total revenues	3,303	10,168	8,854	26,946
Other
Disaggregation of Revenue
Total revenues	$ 207	$ 192	$ 397	$ 380