Accumulated Other Comprehensive Loss (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (42,639)	$ (77,980)	$ (43,575)	$ (75,419)
Cost of sales	165,066	169,510
Provision for income taxes	5,716	6,312
Selling, General and Administrative Expense	44,568	43,962
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(329)	(2,588)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	1,265	27
Other Comprehensive Income (Loss), Net of Tax	936	(2,561)
Unrealized losses on derivative instruments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(2,169)	(2,733)	(2,173)	(2,514)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(377)	(246)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(381)	(27)
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	4	(219)
Pensions and postretirement benefits
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(52,030)	(81,433)	(53,009)	(81,983)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	95	550
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	(884)	0
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	979	550
Accumulated Translation Adjustment [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax	11,560	6,186	11,607	9,078
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax	(47)	(2,892)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax	0	0
Other Comprehensive Income (Loss), Net of Tax	(47)	(2,892)
Reclassifications out of accumulated other comprehensive income | Unrealized losses on derivative instruments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	(610)	(43)
Provision for income taxes	229	16
Net reclassifications for the period	(1,265)	(27)
Reclassifications out of accumulated other comprehensive income | Pensions and postretirement benefits
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Provision for income taxes	442	0
Selling, General and Administrative Expense	(1,686)	0
Reclassifications out of accumulated other comprehensive income | Reclassification out of Accumulated Other Comprehensive Income, Prior Service Cost [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Selling, General and Administrative Expense	360
Reclassification out of Accumulated Other Comprehensive Income, net [Member] [Domain] | Unrealized losses on derivative instruments
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	(381)	(27)
Reclassification out of Accumulated Other Comprehensive Income, net [Member] [Domain] | Pensions and postretirement benefits
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Selling, General and Administrative Expense	$ (884)	$ 0