Supplemental Balance Sheet, Income Statement and Cash Flow Information - Reclass Accumulated Other (Details 5) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Unrealized (gains) losses on available-for-sale securities that were reclassified from net income
Interest expense	$ 45,730	$ 46,601
General and administrative expenses	62,334	115,430
Other expense (income), net	182,404	(55,842)
Income (loss) from continuing operations before income taxes	(448,708)	103,657
Income tax expense (benefit)	(52,064)	(20,705)
Net income (loss)	(397,570)	123,545
Accumulated Other Comprehensive Income | Reclassification adjustment for (gains)/losses included in net income (loss)
Unrealized (gains) losses on available-for-sale securities that were reclassified from net income
Interest expense	153	153
General and administrative expenses	174	276
Other expense (income), net		(5,365)
Income (loss) from continuing operations before income taxes	(327)	(5,794)
Income tax expense (benefit)	129	162
Net income (loss)	$ (198)	$ (5,632)