Property and Equipment - Additional Information (Detail)	1 Months Ended	3 Months Ended	12 Months Ended
	Aug. 31, 2015 $ / bbl	Sep. 30, 2015 USD ($) $ / bbl	Dec. 31, 2016 USD ($) Rigs	Dec. 31, 2015 USD ($) Rigs	Dec. 31, 2014 USD ($) Rigs
Property Plant And Equipment [Line Items]
Impairment charges of fleets				$ 131,000,000
Expected cash flows from contract drilling segment		$ 801,000,000		710,000,000
Average oil price per barrel | $ / bbl	38.22	46.42
Impairment charges related to oil and natural gas properties			$ 2,800,000	$ 10,700,000	$ 20,900,000
Drilling Rigs That Would No Longer Be Marketed As Rigs
Property Plant And Equipment [Line Items]
Number of drilling rigs | Rigs				33	55
Impairment charges of fleets					$ 77,900,000
Mechanically Powered Drilling Rigs That Would No Longer Be Marketed as Rigs
Property Plant And Equipment [Line Items]
Number of drilling rigs | Rigs				24
Non-APEX® electric Drilling Rigs That Would No Longer Be Marketed as Rigs
Property Plant And Equipment [Line Items]
Number of drilling rigs | Rigs				9
Mechanically powered drilling rigs that remain marketable but are not operating
Property Plant And Equipment [Line Items]
Number of drilling rigs | Rigs			19	15
Impairment charges of fleets			$ 0
Pressure Pumping
Property Plant And Equipment [Line Items]
Impairment charges of fleets			$ 0	$ 22,000,000	$ 0
Percentage of excepted cash flows on undiscounted basis exceeding the carrying values of long-lived assets		60.00%		100.00%
Contract Drilling
Property Plant And Equipment [Line Items]
Percentage of excepted cash flows on undiscounted basis exceeding the carrying values of long-lived assets		120.00%		120.00%