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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, 2020	Dec. 31, 2019	Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenues	$ 2,643	$ 805	$ 4,712
Operating income	159	(569)	1,130
Net gain on disposal	(6,749)	(3,883)	(349)
Income tax provision	2,135	1,288	(246)
Income from discontinued operations, net of tax	$ (4,455)	$ (3,164)	$ 535

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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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