Equity Accumulated Other Comprehensive Income (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Change In Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance, Foreign Currency Translation Adjustment, Net of Tax	$ 13,080	$ 10,969	$ 14,207	$ 12,635
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Before Reclassificaions, Net of Tax	4,328	2,299	3,201	633
Ending Balance, Foreign Currency Translation Adjustment, Net of Tax	17,408	13,268	17,408	13,268
Beginning Balance, Pension and Other Postretirement Benefit Plans, Net of Tax	(12,140)	(9,155)	(12,566)	(9,642)
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, Net of Tax	214	244	640	731
Ending Balance, Pension and Other Postretirement Benefit Plans, Net of Tax	(11,926)	(8,911)	(11,926)	(8,911)
Beginning Balance Accumulated Other Comprehensive Income, Net of Tax	940	1,814	1,641	2,993
Other Comprehensive Income (Loss), Before Reclassifications, Net of Tax	4,328	2,299	3,201	633
Other Comprehensive Income (Loss), After Reclassifications, Net of Tax	214	244	640	731
Ending Balance Accumulated Other Comprehensive Income, Net of Tax	5,482	4,357	5,482	4,357
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	4,328	2,299	3,201	633
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	214	244	640	731
Other Comprehensive Income (Loss), Net of Tax	4,542	2,543	3,841	1,364
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax, Portion Attributable to Parent	123		371
Cost of Sales [Member]
Change In Accumulated Other Comprehensive Income [Roll Forward]
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	133	103	399	308
Selling, General and Administrative Expenses [Member]
Change In Accumulated Other Comprehensive Income [Roll Forward]
Other Comprehensive Income (Loss), Reclassification, Pension and Other Postretirement Benefit Plans, Net Gain (Loss) Recognized in Net Periodic Benefit Cost, before Tax	$ 204	$ 141	$ 612	$ 423