Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Equity [Abstract]
Cumulative translation adjustment, Pre-tax	$ (77,024)	$ 13,572	$ 14,445
Cumulative translation adjustment, Tax	0	0	0
Cumulative translation adjustment, Net of Tax	(77,024)	13,572	14,445
Pension and other postretirement adjustments
Net gain (loss) arising during the year, Pre-tax	(26,424)	26,274	(16,607)
Net gain (loss) arising during the year, Tax	7,767	(9,859)	3,107
Net gain (loss) arising during the year, Net of Tax	(18,657)	16,415	(13,500)
Amortization/settlement recognition of net loss (gain), Pre-tax	3,113	8,599	7,801
Amortization/settlement recognition of net loss (gain), Tax	(915)	(3,226)	(1,460)
Amortization/settlement recognition of net loss (gain), Net of Tax	2,198	5,373	6,341
Pension and other postretirement adjustments, Pre-tax	(23,311)	34,873	(8,806)
Pension and other postretirement adjustments, Tax	6,852	(13,085)	1,647
Pension and other postretirement adjustments, Net of Tax	(16,459)	21,788	(7,159)
Reclassification adjustments for derivatives, Pre-tax	7,223	7,430	7,571
Reclassification adjustments for derivatives, Tax	(2,713)	(2,692)	(2,791)
Reclassification adjustments for derivatives, Net of tax	4,510	4,738	4,780
Total other comprehensive income (loss), Pre-tax	(93,112)	55,875	13,210
Total other comprehensive income (loss), Tax	4,139	(15,777)	(1,144)
Total other comprehensive income (loss), Net of Tax	$ (88,973)	$ 40,098	$ 12,066