Income Taxes (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Difference between income tax benefit and statutory federal income tax rate
Federal income tax benefit	$ 35,112	$ 1,832	$ 39,175
Federal income tax benefit, rate	35.00%	35.00%	35.00%
State income tax benefit, net of federal income tax effect	121	141	3,625
State income tax benefit, net of federal income tax effect, rate	0.00%	3.00%	4.00%
Valuation allowance	(34,191)	(894)	(47,141)
Valuation allowance, rate	(34.00%)	(17.00%)	(43.00%)
Other	(856)
Other, rate	(1.00%)
Benefit (provision) applicable to income (loss) from continuing operations	$ 186	$ 1,079	$ (4,341)
Benefit (provision) applicable to income (loss) from continuing operations, rate	0.00%	21.00%	(4.00%)

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.

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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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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 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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The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to changes in the valuation allowance for deferred tax assets in the period.

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