Accumulated Other Comprehensive Loss (Components of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016		Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[1]			$ (704,542)
Before reclassifications to income	[1]			161,888
Reclassifications to income	[1]			5,995
Net other comprehensive income		$ 16,216	$ 35,157	167,883	[1]	$ (259,662)
Ending Balance	[1]	(536,659)		(536,659)
Reclassifications before taxes, included in net periodic benefit expense				7,741
Reclassifications income tax, included in net periodic benefit expense				2,709
Reclassifications before taxes, included in interest expense				1,482
Reclassifications income tax, included in interest expense				519
Foreign Currency Translation Gains (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[1]			(513,004)
Before reclassifications to income	[1]			161,891
Net other comprehensive income	[1]			161,891
Ending Balance	[1]	(351,113)		(351,113)
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]			5,032
Net other comprehensive income	[1]			5,029
Ending Balance	[1]	(174,231)		(174,231)
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]			963
Net other comprehensive income	[1]			963
Ending Balance	[1]	$ (11,315)		$ (11,315)

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

[2] Reclassifications before taxes of $7,741 for the six-month period ended June 30, 2016 are included in the computation of net periodic benefit expense. See Note G for additional information. Related income taxes of $2,709 for the six-month period ended June 30, 2016 are included in Income tax expense.

[3] Reclassifications before taxes of $1,482 for the six-month period ended June 30, 2016 are included in Interest expense. Related income taxes of $519 for the six-month period ended June 30, 2016 are included in Income tax expense.