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Income Taxes (Provision (Benefit) for Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Deferred
Federal	$ (190,207)	$ (9,493)	$ (6,336)
State	(8,521)	807	775
Deferred income taxes	(198,728)	(8,686)	(5,561)
Provision (benefit) for income taxes from discontinued operations	(146,379)	(540)	(6,161)
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
State	1,242	2,052	(289)
Federal	0	0	442
Total current taxes provision (benefit)	1,242	2,052	153
Provision (benefit) for income taxes from continuing and discontinued operations	$ 51,107	$ 7,174	$ 753

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