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Income Taxes (Details) (USD $)	3 Months Ended		6 Months Ended
Income Taxes (Details) (USD $)	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Income Taxes
Alternative minimum tax amount accrued	$ 5,700,000		$ 9,800,000
Alternative minimum tax	80,500,000		80,500,000
Percentage ownership change causing Internal Revenue Service limitations of net operating loss carry-forwards			50.00%
Income tax provision	5,737,000	239,000	9,821,000	472,000
Interest or penalties	$ 0	$ 0	$ 0	$ 0

The tax effect as of the balance sheet date of the amount of future tax deductions arising from unused alternative minimum tax credit carryforwards; a tax credit carryforward is the amount by which tax credits available for utilization exceeded statutory limits on inclusion in historical filings, and which can only be utilized if sufficient tax-basis income is generated in future periods and providing tax laws continue to allow such utilization.

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- Definition

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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