Accumulated Other Comprehensive Loss (Changes) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance Beginning	$ (846,156)		$ (574,556)
Other comprehensive income (loss), before reclassifications	(70,711)	[1]	(5,470)	[1]
Amounts reclassified from accumulated other comprehensive income	8,220	[1],[2]	6,693	[1],[2]
Net current period other comprehensive income (loss)	(62,491)		1,223
Balance Ending	(908,647)		(573,333)
Gains (losses) on cash flow hedges
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance Beginning	(4,689)		(6,380)
Other comprehensive income (loss), before reclassifications	(247)	[1]	41	[1]
Amounts reclassified from accumulated other comprehensive income	796	[1],[2]	332	[1],[2]
Net current period other comprehensive income (loss)	549		373
Balance Ending	(4,140)		(6,007)
Unrealized gains (losses) on available for sale securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance Beginning	2,966		(1,769)
Other comprehensive income (loss), before reclassifications	1,715	[1]	1,840	[1]
Amounts reclassified from accumulated other comprehensive income	15	[1],[2]	219	[1],[2]
Net current period other comprehensive income (loss)	1,730		2,059
Balance Ending	4,696		290
Defined benefit pension plans and nonpension postretirement benefit plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance Beginning	(786,079)		(601,421)
Other comprehensive income (loss), before reclassifications	0	[1]	0	[1]
Amounts reclassified from accumulated other comprehensive income	7,409	[1],[2]	6,142	[1],[2]
Net current period other comprehensive income (loss)	7,409		6,142
Balance Ending	(778,670)		(595,279)
Foreign currency items
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance Beginning	(58,354)		35,014
Other comprehensive income (loss), before reclassifications	(72,179)	[1]	(7,351)	[1]
Amounts reclassified from accumulated other comprehensive income	0	[1],[2]	0	[1],[2]
Net current period other comprehensive income (loss)	(72,179)		(7,351)
Balance Ending	$ (130,533)		$ 27,663

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

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