Long-Term Debt (Details) $ in Thousands		3 Months Ended		4 Months Ended
	Apr. 19, 2017 USD ($)	Mar. 31, 2017 USD ($)	Mar. 31, 2016 USD ($)	Apr. 22, 2016 USD ($)	Dec. 31, 2016 USD ($)
Debtor-in-Possession Financing
Plan of Reogranization, percentage of common stock lenders to receive net of backstop fee				88.50%
Debtor-in-Possession Financing, Amount Arranged				$ 75,000
Senior Notes
Debt and Accrued interest				$ 905,629
DIP Facility [Member]
Debtor-in-Possession Financing
Plan of Reogranization, percentage of common stock lenders to receive net of backstop fee				88.50%
Debtor-in-Possession Financing, Amount Arranged				$ 75,000
Debtor-in-Possession Financing, Fee on Unused Borrowings				3.00%
Line of Credit [Member] | New Credit Facility [Member]
Bank Borrowings and New Credit Facility
Long-term Debt, Excluding Current Maturities		$ 172,000			$ 198,000
Line of Credit Facility, Current Borrowing Capacity				$ 320,000
Predecessor [Member]
Bank Borrowings and New Credit Facility
Interest expense including amortization of debt issuance costs			$ 8,066
Senior Notes
Contractual Interest on senior notes subject to compromise			17,320
Predecessor [Member] | DIP Facility [Member]
Bank Borrowings and New Credit Facility
Interest expense including amortization of debt issuance costs				1,900
Debtor-in-Possession Financing
Debtor-in-Possession Financing, Commitment Fees Paid				$ 900
Predecessor [Member] | Senior Notes [Member]
Bank Borrowings and New Credit Facility
Interest expense including amortization of debt issuance costs			0
Senior Notes
Contractual Interest on senior notes subject to compromise			17,320
Predecessor [Member] | Line of Credit [Member]
Bank Borrowings and New Credit Facility
Interest expense including amortization of debt issuance costs			6,100
Capitalized interest on our unproved properties			$ 0
Successor [Member]
Bank Borrowings and New Credit Facility
Long-term Debt, Excluding Current Maturities		172,000			$ 198,000
Interest expense including amortization of debt issuance costs		3,607
Successor [Member] | Line of Credit [Member]
Bank Borrowings and New Credit Facility
Capitalized interest on our unproved properties		200
Successor [Member] | Line of Credit [Member] | New Credit Facility [Member]
Bank Borrowings and New Credit Facility
Interest expense including amortization of debt issuance costs		3,600
Commitment fees included in interest expense, net		$ 100
Subsequent Event [Member] | Line of Credit [Member] | New Credit Facility [Member]
Bank Borrowings and New Credit Facility
Line of Credit Facility, Maximum Borrowing Capacity	$ 600,000
Line of Credit Facility, Current Borrowing Capacity	330,000
Line of Credit, Letters of Credit Issuable	$ 25,000
Line of Credit, Required Security Interest on Oil and Gas Properties	85.00%
Line of Credit, Covenant, Debt to EBITDA Ratio, Minimum	4.0
Line of Credit, Covenant, Current Ratio, Minimum	1.0
Commitment fee basis points for the credit facility	0.50%
Line of Credit, Additional Interest Due to Payment Default	2.00%
Subsequent Event [Member] | Line of Credit [Member] | New Credit Facility [Member] | Minimum [Member] | Alternative Base Interest Rate [Member]
Bank Borrowings and New Credit Facility
Debt instrument escalating basis spread on base rate	0.0175
Debt Instrument Escalating Rates for Eurodollar Rate Loans	0.0275
Subsequent Event [Member] | Line of Credit [Member] | New Credit Facility [Member] | Maximum [Member] | Alternative Base Interest Rate [Member]
Bank Borrowings and New Credit Facility
Debt instrument escalating basis spread on base rate	0.0275
Debt Instrument Escalating Rates for Eurodollar Rate Loans	0.0375