Income Taxes - Reconciliation of Statutory Federal Tax Rate to Effective Tax Rate (Details) (USD $) In Thousands, unless otherwise specified	11 Months Ended	12 Months Ended	1 Months Ended
Dec. 31, 2010 Successor Company	Dec. 31, 2012 Successor Company	Dec. 31, 2011 Successor Company	Jan. 31, 2010 Predecessor Company
Income Tax [Line Items]
Income (loss) before income taxes	$ (1,543,707)	$ 69,325	$ (643,722)	$ 7,837,550
Statutory federal tax rate	35.00%	35.00%	35.00%	35.00%
State and local taxes, net of federal tax benefit	3.60%	4.70%	3.60%	2.60%
Non-taxable fresh start adjustments	0.00%	0.00%	0.00%	(28.00%)
Non-deductible interest expense	0.00%	8.10%	0.00%	0.00%
Non-deductible impairment expenses	(19.50%)	0.00%	(27.50%)	0.00%
Section 382 limitation	22.90%	0.00%	0.00%	1.10%
Section 108 tax attribution reduction	0.00%	(2.60%)	0.00%	21.40%
Section 1245 recapture	0.00%	14.50%	12.60%	0.00%
Change in valuation allowance	(2.30%)	(56.20%)	(8.00%)	(19.50%)
Change in gross unrecognized tax benefits	0.00%	0.00%	2.90%	0.00%
Change in state tax laws	0.00%	4.00%	0.00%	0.00%
Other, net	0.50%	2.50%	0.80%	(0.90%)
Effective tax rate	40.20%	10.00%	19.40%	11.70%

Effective Income Tax Rate Recociliation, Non-deductible Interest Expense

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Effective Income Tax Rate Reconciliation, Change in State Tax Laws

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Effective Income Tax Rate Reconciliation, Change in Unrecognized Tax Benefits, Gross

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Effective Income Tax Rate Reconciliation, Non-taxable Fresh Start Adjustments

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Effective Income Tax Rate Reconciliation, Section 108 Tax Attribution Reduction

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Effective Income Tax Rate Reconciliation, Section 1245 Recapture

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Effective Income Tax Rate Reconciliation, Section 382 Limitation

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- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

+ References

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The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate is the regular tax rate if there are alternative tax systems.

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-Publisher FASB

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-Number 109

-Paragraph 47

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to changes in the valuation allowance for deferred tax assets.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to nondeductible impairment losses under enacted tax laws.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense or benefit, net of the federal tax benefit (expense) thereon, recorded during the period.

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This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses from ongoing operations, after income or loss from equity method investments, but before income taxes, extraordinary items, and noncontrolling interest.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 10

-Article 5

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