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Income Taxes - Components of Income Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Current
Federal	$ 0	$ 0	$ 0
State	86	(317)	(83)
Total current	(86)	317	83
Deferred
Federal	10,308	3,410	24,219
State	87	644	449
Valuation allowance	(10,385)	(4,308)	(392)
Total deferred	(10)	254	(24,276)
Income tax (expense) benefit	$ (96)	$ 571	$ (24,193)

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