Long-Term Debt - Additional Information (Details) - USD ($)		3 Months Ended
	Sep. 02, 2014	Mar. 31, 2016	Mar. 31, 2015	Apr. 13, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Cross default provision, threshold amount		$ 10,000,000
Available for borrowings		1,400,000,000			$ 1,177,500,000
Initial borrowing base		$ 1,400,000,000			$ 1,400,000,000
Loan limit percentage (less than)		10.00%
Credit facility cross default provision, threshold amount		$ 75,000,000
Interest expense		9,833,000	$ 11,758,000
Debt issuance costs		800,000	$ 800,000
Capitalized interest expense		$ 0
Commitment fee (basis points)		0.30%
Syndicated Credit Facility | Credit Facility, September 2, 2014
Debt Instrument [Line Items]
Term of credit facility	5 years
Debt covenant, debt to EBITDAX ratio		4.0
Debt covenant, current assets to current liabilities ratio		1.0
Debt covenant, minimum net present value of proved reserves to consolidated debt, ratio		1.50
Credit facility | Subsequent Event
Debt Instrument [Line Items]
Initial borrowing base				$ 1,050,000,000