Organization and Summary of Significant Accounting Policies - Estimated Useful Lives of Asset Classes (Detail)	12 Months Ended
	Dec. 31, 2018
Well Service Rigs And Components | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	3 years
Well Service Rigs And Components | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	15 years
Oilfield Trucks, Vehicles And Related Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	4 years
Oilfield Trucks, Vehicles And Related Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	7 years
Fishing and rental tools, coiled tubing units and equipment, tubulars and pressure control equipment | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	3 years
Fishing and rental tools, coiled tubing units and equipment, tubulars and pressure control equipment | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	10 years
Disposal Wells | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	15 years
Disposal Wells | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	15 years
Furniture and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	3 years
Furniture and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	7 years
Building and Improvements | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	15 years
Building and Improvements | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment, useful life	30 years