Accumulated Other Comprehensive Loss (Components of Accumulated Other Comprehensive Loss) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[1]	$ (704,542,000)	[2]	$ (170,255,000)
Before reclassifications to income	[1]	62,686,000		(593,918,000)
Reclassifications to income	[1]	13,644,000		59,631,000
Net other comprehensive income (loss)		76,330,000	[1]	(534,287,000)	[1]	$ (342,374,000)
Ending Balance	[1]	(628,212,000)		(704,542,000)	[2]	(170,255,000)
Reclassifications before taxes, included in net periodic benefit expense		18,036,000		21,721,000
Reclassifications income tax, included in net periodic benefit expense		6,318,000		5,761,000
Amount of loss reclassified to interest expense		2,963,000		2,963,000		2,963,000
Reclassifications income tax, included in interest expense		1,037,000		1,037,000
Foreign Currency Translation Gains (Losses) [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[1]	(513,004,000)		33,701,000
Before reclassifications to income	[1]	66,449,000		(588,450,000)
Reclassifications to income	[1],[3]			41,745,000
Net other comprehensive income (loss)	[1]	66,449,000		(546,705,000)
Ending Balance	[1]	(446,555,000)		(513,004,000)		33,701,000
Retirement and Postretirement Benefit Plan Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[1]	(179,260,000)		(189,752,000)
Before reclassifications to income	[1]	(3,763,000)		(5,468,000)
Reclassifications to income	[1],[4]	11,718,000		15,960,000
Net other comprehensive income (loss)	[1]	7,955,000		10,492,000
Ending Balance	[1]	(171,305,000)		(179,260,000)		(189,752,000)
Deferred Loss On Interest Rate Derivative Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning Balance	[1]	(12,278,000)		(14,204,000)
Reclassifications to income	[1],[5]	1,926,000		1,926,000
Net other comprehensive income (loss)	[1]	1,926,000		1,926,000
Ending Balance	[1]	$ (10,352,000)		$ (12,278,000)		$ (14,204,000)

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

[2] Reclassified to conform to current presentation. See Note B for additional information.

[3] Reclassification for the year ended December 31, 2015 are included in discontinued operations and primarily relate to financial adjustments recognized upon selling all operational assets in the U.K.

[4] Reclassifications before taxes of $21,721 and $18,036 are included in the computation of net periodic benefit expense in 2015 and 2016, respectively. See Note K for additional information. Related income taxes of $5,761 and $6,318 are included in income tax expense in 2015 and 2016, respectively.

[5] Reclassifications before taxes of $2,963 are included in Interest expense in both 2015 and 2016. Related income taxes of $1,037 are included in income tax expense in 2015 and 2016. See Note L for additional information.