Accumulated Other Comprehensive Loss (Changes) (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), Net of Tax [Roll Forward]
Beginning Balance				$ (888,635)	$ (846,156)
Other comprehensive income (loss) before reclassifications	[1]			35,337	(61,794)
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			12,871	15,444
Other comprehensive (loss) income, net of tax		$ (581)	$ 16,141	48,208	(46,350)
Ending Balance		(840,427)	(892,506)	(840,427)	(892,506)
Cash flow hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance				(3,912)	(4,689)
Other comprehensive income (loss) before reclassifications	[1]			(420)	(1,273)
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			842	1,489
Other comprehensive (loss) income, net of tax				422	216
Ending Balance		(3,490)	(4,473)	(3,490)	(4,473)
Available for sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance				536	2,966
Other comprehensive income (loss) before reclassifications	[1]			5,862	(1,499)
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			1	26
Other comprehensive (loss) income, net of tax				5,863	(1,473)
Ending Balance		6,399	1,493	6,399	1,493
Pension and postretirement benefit plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance				(738,768)	(786,079)
Other comprehensive income (loss) before reclassifications	[1]			(430)	0
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			12,028	13,929
Other comprehensive (loss) income, net of tax				11,598	13,929
Ending Balance		(727,170)	(772,150)	(727,170)	(772,150)
Foreign currency adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance				(146,491)	(58,354)
Other comprehensive income (loss) before reclassifications	[1]			30,325	(59,022)
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			0	0
Other comprehensive (loss) income, net of tax				30,325	(59,022)
Ending Balance		$ (116,166)	$ (117,376)	$ (116,166)	$ (117,376)

[1] Amounts are net of tax. Amounts in parentheses indicate debits to AOCL.

[2] See table above for additional details of these reclassifications.