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Assets Held for Sale and Discontinued Operations (Assets held for sale and discontinued operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Assets Held For Sale and Discontinued Operations [Abstract]
Revenues	$ 946	$ 1,390	$ 2,269	$ 3,001
Operating income	239	353	543	819
Gain (loss) on disposition	630	(2)	47	426
(Provision) benefit for income taxes	(330)	(148)	(224)	(503)
Income (loss) from discontinued operations	$ 539	$ 203	$ 366	$ 742

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

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Tax benefit from provision recognizing a loss for initial, or subsequent, write-down to fair value (less cost to sell) of a of a disposal group that is classified as a component of the entity, which remains unsold as of the reporting date. May include a tax on the (gain) for the recognition of a subsequent increase in fair value (less cost to sell), but not in excess of the cumulative loss previously recognized through write-downs.

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Amount of operating income or loss attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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Amount of income (loss) from a disposal group, net of income tax before extraordinary items 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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