Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Operations of the Company's operating segments
Net Sales to External Customers	$ 524,353	$ 535,400
Net Sales to Other Segments	0	0
Total net sales	524,353	535,400
Segment Profit	85,433	80,794
Goodwill	445,709	451,678	452,351
U.S. Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	158,386	157,298
Net Sales to Other Segments	18,377	18,111
Total net sales	176,763	175,409
Segment profit	24,643	23,957
Goodwill	307,933	307,570
Swiss Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	30,697	31,605
Net Sales to Other Segments	97,123	97,519
Total net sales	127,820	129,124
Segment profit	35,403	29,142
Goodwill	22,694	23,853
Western European Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	146,168	153,005
Net Sales to Other Segments	28,112	23,847
Total net sales	174,280	176,852
Segment profit	18,298	18,265
Goodwill	100,483	104,921
Chinese Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	90,727	91,294
Net Sales to Other Segments	30,402	29,813
Total net sales	121,129	121,107
Segment profit	24,648	25,318
Goodwill	722	715
Other Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	98,375	102,198
Net Sales to Other Segments	1,420	1,649
Total net sales	99,795	103,847
Segment profit	9,487	10,324
Goodwill	13,877	14,619
Intersegment Elimination [Member]
Operations of the Company's operating segments
Net Sales to External Customers	0	0
Net Sales to Other Segments	(175,434)	(170,939)
Total net sales	(175,434)	(170,939)
Segment profit	(27,046)	(26,212)
Goodwill	$ 0	$ 0