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VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Valuation and qualifying accounts [Roll forward]
Tax credit valuation allowance			$ 207
Federal and state
Valuation and qualifying accounts [Roll forward]
Valuation allowance expense (benefit) from Tax Cuts and Jobs Act			6,042
Tax credit valuation allowance	$ 50,300	$ 50,300
Change in valuation allowance			5,919
Deferred Tax Valuation Allowance
Valuation and qualifying accounts [Roll forward]
Balance at beginning of period	408,903	336,417	336,087
Provision within facility operating expense	(27,913)	60,376	330
Recoveries and other	0	13,790	0
Write-offs	0	(1,680)	0
Balance at end of period	$ 380,990	$ 408,903	$ 336,417

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Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense (Benefit)

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Amount of valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from tax credit carryforwards for which it is more likely than not that a tax benefit will not be realized.

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Amount of valuation and qualifying accounts and reserves.

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Amount of increase in valuation and qualifying accounts and reserves from charge to accounts other than cost and expense.

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Amount of decrease in valuation and qualifying accounts and reserves.

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