Accumulated Other Comprehensive Loss (Components of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016		Sep. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[1]			$ (704,542)
Before reclassifications to income	[1]			124,519
Reclassifications to income	[1]			8,992
Net other comprehensive income		$ (34,372)	$ (191,842)	133,511	[1]	$ (451,504)
Ending Balance	[1]	(571,031)		(571,031)
Reclassifications before taxes, included in net periodic benefit expense				11,602
Reclassifications income tax, included in net periodic benefit expense				4,055
Reclassifications before taxes, included in interest expense				2,222
Reclassifications income tax, included in interest expense				777
Foreign Currency Translation Gains (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[1]			(513,004)
Before reclassifications to income	[1]			124,522
Net other comprehensive income	[1]			124,522
Ending Balance	[1]	(388,482)		(388,482)
Retirement and Postretirement Benefit Plan Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[1]			(179,260)
Before reclassifications to income	[1]			(3)
Reclassifications to income	[1],[2]			7,547
Net other comprehensive income	[1]			7,544
Ending Balance	[1]	(171,716)		(171,716)
Deferred Loss On Interest Rate Derivative Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[1]			(12,278)
Reclassifications to income	[1],[3]			1,445
Net other comprehensive income	[1]			1,445
Ending Balance	[1]	$ (10,833)		$ (10,833)

[1] All amounts are presented net of income taxes.

[2] Reclassifications before taxes of $11,602 for the nine-month period ended September 30, 2016 are included in the computation of net periodic benefit expense. See Note G for additional information. Related income taxes of $4,055 for the nine-month period ended September 30, 2016 are included in Income tax expense.

[3] Reclassifications before taxes of $2,222 for the nine-month period ended September 30, 2016 are included in Interest expense. Related income taxes of $777 for the nine-month period ended September 30, 2016 are included in Income tax expense.