Income Taxes (Details) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2011	Jun. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Income Taxes [Abstract]
Effective tax rate	77.00%		80.00%	25.00%	29.00%
Statutory rate	35.00%		35.00%	35.00%	35.00%
Discrete tax benefit from state tax filings					$ 1,000,000
Discrete tax expense resulting from employee stock option cancellations	400,000		300,000	3,600,000	1,400,000
Discrete tax expense related to the establishment of a valuation allowance	300,000	900,000
Tax expense (benefit)	$ 2,551,000		$ (526,000)	$ (7,393,000)	$ 9,353,000

This amount represents a discrete tax benefit and anticipated refund that resulted from the filing of amended state tax returns in the state of North Carolina.

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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 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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The portion of the difference between total income tax expense or benefit as reported in the Income Statement for the period 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 differences in the deductibility of incentive stock options and other equity-based compensation costs in accordance with generally accepted accounting principles and enacted tax laws.

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