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Divested 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, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 805	$ 4,712	$ 605
Operating income	(569)	1,130	277
Net gain on disposal	(3,883)	(349)	191
Income tax provision	1,288	(246)	(187)
Income from discontinued operations, net of tax	$ (3,164)	$ 535	$ 281

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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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