Accumulated Other Comprehensive Loss (Changes) (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), Net of Tax [Roll Forward]
Beginning Balance				$ (888,635)	$ (846,156)
Other comprehensive income (loss) before reclassifications	[1]			42,126	(75,355)
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			20,547	20,659
Other comprehensive income (loss), net of tax		$ 14,465	$ (8,346)	62,673	(54,696)
Ending Balance		(825,962)	(900,852)	(825,962)	(900,852)
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]			(705)	382
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			1,063	(47)
Other comprehensive income (loss), net of tax				358	335
Ending Balance		(3,554)	(4,354)	(3,554)	(4,354)
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]			6,798	416
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			693	(658)
Other comprehensive income (loss), net of tax				7,491	(242)
Ending Balance		8,027	2,724	8,027	2,724
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]			(1,230)	0
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			18,791	21,364
Other comprehensive income (loss), net of tax				17,561	21,364
Ending Balance		(721,207)	(764,715)	(721,207)	(764,715)
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]			37,263	(76,153)
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			0	0
Other comprehensive income (loss), net of tax				37,263	(76,153)
Ending Balance		$ (109,228)	$ (134,507)	$ (109,228)	$ (134,507)

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

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