Bankruptcy Proceedings (Details)		8 Months Ended
	May 12, 2016 subsidiary	Sep. 12, 2016 USD ($) shares	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($) shares	Aug. 11, 2016	May 11, 2016	May 10, 2016 USD ($)	Dec. 31, 2015 USD ($)
Debt Instrument [Line Items]
Bankruptcy Claims, amount reserved for outstanding claims			$ 3,922,000					$ 0
Liabilities Subject to Compromise, Senior Notes		$ 1,075,000,000
Backstop Commitment Agreement, Backstop Commitment		6,022,000					$ 50,000,000
Number of Subsidiaries Filing Chapter 11 Bankruptcy | subsidiary	8
Percentage of Common Stock Holders agreed to RSA				86.00%
Plan of Reorganization, Percent of Claims Attributable to Pre-Petition Completed					100.00%
Liabilities Subject to Compromise, Debt and Accrued Interest		$ 1,122,000,000
Plan of Reorganization, Senior Notes and Unsecured Claims Common Stock Exchanged | shares				6,069,074
Plan of Reorganization, percentage of commons stock lenders to receive net of backstop fee		41.00%
Rights Offering, Rights Offering Amount		$ 49,943,000
Plan of Reorganization, Rights Offering Issuance of Common Stock | shares		7,633,588
Plan of Reorganization, Percentage of Common Stock to holders of claims arising under the Senior Notes, general unsecured claims and to the Backstop Parties		51.00%
Plan of Reorganization, Backstop Parties Common Shares Received | shares		472,902
Plan Of Reorganization, Backstop Parties Common Shares Received, Percent Of Common Stock		3.00%
Plan of Reorganization, CS authorized for Disputed General Unsecured Claims and Non-Accredited Investor Holders of Senior Notes | shares		816,454
Plan of Reorganization, Common Stock reserved for Issuance of Management Incentive Plan | shares		749,600
Plan of Reorganization, Line of Credit Facility, Initial Borrowing		$ 75,400,000		$ 75,400,000
Plan of Reorganization, DIP Fees		100,000
Plan of Reorganization, Cash Reserve		2,700,000
Plan of Reorganization, Escrow Account for Professional Fees		14,575,000
Debtor Reorganization Items, Legal and Advisory Professional Fees		7,200,000
DIP Facility [Member]
Debt Instrument [Line Items]
Debtor-in-Possession Financing, Borrowings Outstanding		$ 0
Senior Notes [Member] | Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage						7.25%
Senior Notes [Member] | Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage						8.50%
Share-based Compensation Award, Tranche One [Member]
Debt Instrument [Line Items]
Plan Of Reorganization, Shares Authorized, Percent Of Common Stock		5.00%