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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
Mar. 31, 2014
Mar. 31, 2013
Assets Held For Sale and Discontinued Operations [Abstract]    
Revenues $ 51 $ 1,432
Operating income 20 338
Gain (loss) on disposition 909 (583)
(Provision) benefit for income taxes (362) 94
Income (loss) from discontinued operations $ 567 $ (151)