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Income Taxes (Provision (Benefit) for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Deferred
Federal	$ 29,434	$ 6,449	$ (192,472)
State	5,584	1,698	(8,703)
Deferred income taxes	35,018	8,147	(201,175)
Provision (benefit) for income taxes from discontinued operations	136	14,855	146,379
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal	(584)	(10,367)	0
State	5,897	5,335	1,242
Total current taxes provision	5,313	(5,032)	1,242
Provision (benefit) for income taxes from continuing and discontinued operations	$ 40,467	$ 17,970	$ (53,554)

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