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Debtor in Possession Financial Information - Summary of Liabilities Subject to Compromise in Consolidated Balance Sheet (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2012
Dec. 31, 2011
Reorganization Items [Line Items]    
Debt obligations and accrued interest payable $ 1,690,312 $ 1,690,312
Other 17,096 17,109
Consolidated Liabilities subject to compromise 1,707,408 1,707,421
Payable to non-debtor subsidiaries 35 35
Debtor's Liabilities subject to compromise $ 1,707,443 $ 1,707,456