Summary of Significant Accounting Policies (Schedule of Change in Accumulated Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ 4,860,863	$ 4,422,813	$ 4,470,306
Ending balance	5,783,487	4,860,863	4,422,813
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(788,652)	(428,505)	178,846
Current period other comprehensive income (loss) before reclassifications	(36,702)	(360,147)	(607,351)
Amounts reclassified from accumulated other comprehensive loss	0	0	0
Ending balance	(825,354)	(788,652)	(428,505)
Pensions and post-retirement benefits
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(4,916)	(816)	(157)
Current period other comprehensive income (loss) before reclassifications	(2,757)	(4,100)	(659)
Amounts reclassified from accumulated other comprehensive loss	0	0	0
Ending balance	(7,673)	(4,916)	(816)
AOCI including portion attributable to noncontrolling interest
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(793,568)	(429,321)	178,689
Current period other comprehensive income (loss) before reclassifications	(39,459)	(364,247)	(608,010)
Amounts reclassified from accumulated other comprehensive loss	0	0	0
Ending balance	$ (833,027)	$ (793,568)	$ (429,321)