Accumulated Other Comprehensive Loss (Components of Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[1]	$ (609,787)
Before reclassifications to income and retained earnings		25,449
Reclassifications to income		3,339
Net other comprehensive loss		28,788	$ (82,494)
Ending Balance		(580,999)
Foreign Currency Translation Gains (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(419,852)
Before reclassifications to income and retained earnings		25,449
Net other comprehensive loss		25,449
Ending Balance		(394,403)
Retirement and Postretirement Benefit Plan Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(182,036)
Reclassifications to income	[2]	2,754
Net other comprehensive loss		2,754
Ending Balance		(179,282)
Reclassifications before taxes, included in net periodic benefit expense		3,530
Reclassifications, income tax expense		776
Deferred Loss On Interest Rate Derivative Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance		(7,899)
Reclassifications to income	[3]	585
Net other comprehensive loss		585
Ending Balance		(7,314)
Reclassifications before taxes, included in net periodic benefit expense		741
Reclassifications income tax, included in interest expense		$ 156

[1] Reclassified to conform to current presentation (see Note A).

[2] Reclassifications before taxes of $3,530 are included in the computation of net periodic benefit expense for the three-month period ended March 31, 2019. See Note H for additional information. Related income taxes of $776 are included in Income tax expense (benefit) for the three-month period ended March 31, 2019.

[3] Reclassifications before taxes of $741 are included in Interest expense, net, for the three-month period ended March 31, 2019. Related income taxes of $156 are included in Income tax expense (benefit) for the three-month period ended March 31, 2019. See Note L for additional information.