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Income Taxes - Components of Net Deferred Tax Asset (Liability) (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Schedule Of Balance Sheet Classification Of Net Deferred Income Tax Assets Liabilities [Line Items]    
Federal Net operating loss carry-forward $ 29,990 $ 28,116
State Net operating loss carry-forward 5,066 4,841
Capital loss carry-forward 25,283 19,834
Unrealized loss on investment in the Operating LLC 113,398 114,121
Other 1,253 6,730
Ending deferred tax asset/(liability) 174,990 173,642
Less: Deferred tax asset valuation allowance (167,498) (166,963)
Net deferred tax asset/(liability) 7,492 6,679
Unrealized gain on debt (14,095) (14,179)
Ending deferred tax asset/(liability) (14,095) (14,179)
Net deferred tax asset/(liability) (14,095) (14,179)
Federal Net operating loss carry-forward 29,990 28,116
State Net operating loss carry-forward 5,066 4,841
Capital loss carry-forward 25,283 19,834
Unrealized gain on debt (14,095) (14,179)
Unrealized loss on investment in the Operating LLC 113,398 114,121
Other 1,253 6,730
Ending deferred tax asset/(liability) 160,895 159,463
Less: Deferred tax asset valuation allowance (167,498) (166,963)
Net deferred tax asset/(liability) $ (6,603) $ (7,500)