Supplemental Selected Quarterly Financial Data (Unaudited) - Additional Information (Details) - USD ($)	1 Months Ended	3 Months Ended				12 Months Ended
	Apr. 30, 2015	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Impairment expense		$ 6,800,000		$ 136,500,000		$ 24,283,000	$ 138,086,000	$ 19,359,000
Impairment of goodwill		$ 17,500,000		$ 1,600,000		17,532,000	1,547,000	$ 0
Termination of drilling rig			$ 5,100,000
Gain on sale of oil and gas properties	$ 1,600				$ 1,600,000	$ 8,000	$ 1,617,000