Discontinued Operations and Held For Sale (Operating Results of Discontinued Operations) (Details) - AMS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	$ 30,101	$ 305,256	$ 496,505
Litigation related and other contingencies, net	20,115	1,107,752	1,273,358
Asset impairment charges	21,328	230,703	0
Gain on sale of business	0	13,550	0
Loss from discontinued operations before income taxes	(123,164)	(1,352,344)	(1,225,576)
Income tax benefit	0	(157,418)	(440,107)
Discontinued operations, net of tax	$ (123,164)	$ (1,194,926)	$ (785,469)