Charges Related To Restructuring Activities Narrative (Details) (USD $)	3 Months Ended	12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	$ 2,522,000	$ 11,395,000	$ 10,534,000
Restructuring Reserve, Settled with Cash	4,022,000	9,381,000	5,555,000
Restructuring and Related Activities, Expected Payout Period	12 months
Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	2,436,000	6,775,000	8,352,000
Restructuring Reserve, Settled with Cash	3,101,000	6,469,000	3,447,000
Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	86,000	1,725,000	1,788,000
Restructuring Reserve, Settled with Cash	766,000	174,000	1,714,000
Product Line Discontinuance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	0	491,000	277,000
Restructuring Reserve, Settled with Cash	151,000	340,000	277,000
Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	0	2,404,000	117,000
Restructuring Reserve, Settled with Cash	4,000	2,398,000	117,000
Europe [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	115,000	2,093,000	5,466,000
Restructuring Reserve, Settled with Cash	461,000	3,314,000	3,650,000
Europe [Member] | Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	115,000	817,000	3,288,000
Restructuring Reserve, Settled with Cash	461,000	1,964,000	1,546,000
Europe [Member] | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	0	53,000	1,788,000
Restructuring Reserve, Settled with Cash	0	127,000	1,714,000
Europe [Member] | Product Line Discontinuance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	0	0	277,000
Restructuring Reserve, Settled with Cash	0	0	277,000
Europe [Member] | Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	0	1,223,000	113,000
Restructuring Reserve, Settled with Cash	0	1,223,000	113,000
Asia Pacific [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	539,000	5,020,000	186,000
Restructuring Reserve, Settled with Cash	1,539,000	2,369,000	186,000
Asia Pacific [Member] | Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	453,000	1,681,000	186,000
Restructuring Reserve, Settled with Cash	618,000	812,000	186,000
Asia Pacific [Member] | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	86,000	1,667,000	0
Restructuring Reserve, Settled with Cash	766,000	42,000	0
Asia Pacific [Member] | Product Line Discontinuance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	0	491,000	0
Restructuring Reserve, Settled with Cash	151,000	340,000	0
Asia Pacific [Member] | Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	0	1,181,000	0
Restructuring Reserve, Settled with Cash	4,000	1,175,000	0
NA/HME [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	1,679,000	4,247,000	4,759,000
Restructuring Reserve, Settled with Cash	2,005,000	3,592,000	1,667,000
NA/HME [Member] | Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	1,679,000	4,242,000	4,755,000
Restructuring Reserve, Settled with Cash	2,005,000	3,587,000	1,663,000
NA/HME [Member] | Contract Termination [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	0	5,000	0
Restructuring Reserve, Settled with Cash	0	5,000	0
NA/HME [Member] | Product Line Discontinuance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	0	0	0
Restructuring Reserve, Settled with Cash	0	0	0
NA/HME [Member] | Other [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges including Inventory Markdowns	0	0	4,000
Restructuring Reserve, Settled with Cash	$ 0	$ 0	$ 4,000