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Discontinued Operations Assets Held for Sale and Discontinued Operations (Assets held for sale and discontinued operations) (Details) - Tennessee - Discontinued Operations, Disposed of by Sale [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 4,712	$ 605	$ 744
Operating income	1,130	277	314
Net gain on disposal	(349)	191	(29)
Income tax provision	(246)	(187)	(112)
Income from discontinued operations, net of tax	$ 535	$ 281	$ 173

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Amount of tax (expense) benefit on (gain) loss recognized for the (reversal of write-down) write-down to fair value, less cost to sell, of a discontinued operation.

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