Discontinued Operations Income (Loss) from Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Revenue									$ 0	$ 0	$ 2,598,875
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax									0	(7,044)	969,685
Discontinued Operation, Tax Effect of Discontinued Operation									0	1,357	(389,893)
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ (5,687)	0	$ (5,687)	$ 579,792
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Sale of Property Plant Equipment					$ 7,044				$ 1,035,346