Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Undistributed Earnings of Foreign Subsidiaries	$ 660,000
Cash held by non-US subsidiaries	358,000	$ 330,000
Income tax benefits attributable to equity-based compensation	(1,600)	(7,700)	$ (6,400)
Tax expense/(benefit) related to changes in pension and post-retirement plan assets and benefit obligations	4,600	(61,100)	36,200
Unrealized tax asset on related tax loss	98,700	95,500
Valuation allowance against U.S. and non-U.S. deferred tax assets	47,200	45,500
Total valuation allowance	145,900	141,000
Increase in total amount of unrecognized tax benefits that would impact effective tax rate	46,600	42,200	27,700
Interest expense and penalties, related to unrecognized tax benefits	1,100	700	$ 900
Unrecognized tax benefits, income tax penalties and interest accrued	5,800	$ 4,700
Change in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit	$ 2,200