Organization and Summary of Significant Accounting Policies - Components of Inventories (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Tubular goods and equipment	$ 15,243	$ 15,633
Crude oil	96,744	78,518
Total	$ 111,987	$ 94,151