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Assets Held for Sale and Discontinued Operations Assets Held for Sale and Discontinued Operations (Assets held for sale and discontinued operations) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Discontinued Operations and Disposal Groups [Abstract]
Revenues	$ 817	$ 4,164	$ 7,727
Operating income	235	729	2,293
Impairment	(1,180)	(100)	(1,100)
Net gain on disposal	1,594us-gaap_GainLossOnDispositionOfAssets1	6,091us-gaap_GainLossOnDispositionOfAssets1	610us-gaap_GainLossOnDispositionOfAssets1
Income tax provision	(257)	(2,544)	(717)
Income from discontinued operations, net of tax	$ 392	$ 4,176	$ 1,086

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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