Annual report pursuant to Section 13 and 15(d)

Bankruptcy Proceedings (Details)

Bankruptcy Proceedings (Details)
8 Months Ended
May 12, 2016
Sep. 12, 2016
USD ($)
Dec. 31, 2016
USD ($)
Sep. 30, 2016
USD ($)
Aug. 11, 2016
May 11, 2016
May 10, 2016
USD ($)
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%