Other Comprehensive Income (Loss) (Components of Other Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Equity [Abstract]
Cumulative translation adjustment, Pre-tax	$ 13,572	$ 14,445	$ (14,108)
Cumulative translation adjustment, Tax	0	0	0
Cumulative translation adjustment, Net of Tax	13,572	14,445	(14,108)
Pension and Other Postretirement Adjustments
Net gain (loss) arising during the year, Pre-tax	26,274	(16,607)	(18,066)
Net gain (loss) arising during the year, Tax	(9,859)	3,107	6,038
Net gain (loss) arising during the year, Net of Tax	16,415	(13,500)	(12,028)
Amortization/settlement recognition of net loss (gain), Pre-tax	8,599	7,801	5,446
Amortization/settlement recognition of net loss (gain), Tax	(3,226)	(1,460)	(1,816)
Amortization/settlement recognition of net loss (gain), Net of Tax	5,373	6,341	3,630
Pension and other postretirement adjustments, Pre-tax	34,873	(8,806)	(12,620)
Pension and other postretirement adjustments, Tax	(13,085)	1,647	4,222
Pension and other postretirement adjustments, Net of Tax	21,788	(7,159)	(8,398)
Reclassification adjustments for derivatives, Pre-tax	7,430	7,571	(32,754)
Reclassification adjustments for derivatives, Tax	(2,692)	(2,791)	12,500
Reclassification adjustments for derivatives, Net of tax	4,738	4,780	(20,254)
Total other comprehensive income (loss), Pre-tax	55,875	13,210	(59,482)
Total other comprehensive income (loss), Tax	(15,777)	(1,144)	16,722
Total other comprehensive income (loss), Net of Tax	$ 40,098	$ 12,066	$ (42,760)