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Discontinued Operations Assets Held for Sale and Discontinued Operations (Assets held for sale and discontinued operations) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Income from discontinued operations, net of tax $ 0 $ 0 $ 392
Tennessee | Discontinued Operations, Disposed of by Sale [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Disposal Group, Including Discontinued Operation, Consideration 1,350    
Revenues 744 0 0
Operating income 314 0 0
Net gain on disposal (29) 0 0
Income tax provision (112) 0 0
Income from discontinued operations, net of tax 173 0 0
Florida, Ohio, and Kentucky [Member] | Discontinued Operations, Disposed of by Sale [Member]      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Revenues 0 0 817
Operating income 0 0 235
Impairment 0 0 (1,180)
Net gain on disposal 0 0 1,594
Income tax provision 0 0 (257)
Income from discontinued operations, net of tax $ 0 $ 0 $ 392