Restructuring Activities (Restructuring Activities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Restructuring Reserve [Roll Forward]
Restructuring reserves, beginning balance	$ 707
Charged to expenses	1,105
Amounts paid	(885)
Foreign currency translation	24
Restructuring reserves, ending balance	951
Termination Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserves, beginning balance	267
Charged to expenses	657
Amounts paid	(460)
Foreign currency translation	10
Restructuring reserves, ending balance	474
Site Closure Costs [Member]
Restructuring Reserve [Roll Forward]
Restructuring reserves, beginning balance	440
Charged to expenses	448
Amounts paid	(425)
Foreign currency translation	14
Restructuring reserves, ending balance	$ 477