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Discontinued Operations (Details) (USD $)	3 Months Ended
Discontinued Operations (Details) (USD $)	Mar. 31, 2013	Mar. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax		$ (1,604,000)
Disposal Group, Including Discontinued Operation, Revenue	20,068,000	35,520,000
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(2,062,000)	17,728,000
Tax benefits recognized from discontinued operations	$ 19,000,000

Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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- Definition

Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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