Revenue - Summary of Revenues Disaggregated (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Total revenues	$ 58,136	$ 65,155
Oil and Natural Gas Sales [Member]
Revenues:
Total revenues	57,787	65,067
Oil [Member]
Revenues:
Total revenues	41,851	40,057
NGLs [Member]
Revenues:
Total revenues	5,122	5,865
Natural Gas [Member]
Revenues:
Total revenues	$ 10,814	$ 19,145