Accumulated Other Comprehensive Loss (Changes) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance				$ (846,156)	$ (574,556)
Other comprehensive income (loss) before reclassifications	[1]			(75,355)	(56,768)
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			20,659	16,583
Other comprehensive loss, net of tax		$ (8,346)	$ (55,390)	(54,696)	(40,185)
Ending Balance		(900,852)	(614,741)	(900,852)	(614,741)
Cash flow hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance				(4,689)	(6,380)
Other comprehensive income (loss) before reclassifications	[1]			382	892
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			(47)	556
Other comprehensive loss, net of tax				335	1,448
Ending Balance		(4,354)	(4,932)	(4,354)	(4,932)
Available for sale securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance				2,966	(1,769)
Other comprehensive income (loss) before reclassifications	[1]			416	2,567
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			(658)	695
Other comprehensive loss, net of tax				(242)	3,262
Ending Balance		2,724	1,493	2,724	1,493
Pension and postretirement benefit plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance				(786,079)	(601,421)
Other comprehensive income (loss) before reclassifications	[1]			0	0
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			21,364	19,116
Other comprehensive loss, net of tax				21,364	19,116
Ending Balance		(764,715)	(582,305)	(764,715)	(582,305)
Foreign currency adjustments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Beginning Balance				(58,354)	35,014
Other comprehensive income (loss) before reclassifications	[1]			(76,153)	(60,227)
Amounts reclassified from accumulated other comprehensive loss	[1],[2]			0	(3,784)
Other comprehensive loss, net of tax				(76,153)	(64,011)
Ending Balance		$ (134,507)	$ (28,997)	$ (134,507)	$ (28,997)

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

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