Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Operations of the Company's operating segments
Net Sales to External Customers	$ 570,283	$ 561,088	$ 1,105,683	$ 1,059,854
Net Sales to Other Segments	0	0	0	0
Total net sales	570,283	561,088	1,105,683	1,059,854
Segment Profit	101,057	94,532	181,851	168,310
Goodwill	446,280	447,599	446,280	447,599	447,743
U.S. Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	177,182	167,017	334,480	315,229
Net Sales to Other Segments	16,626	19,412	34,737	38,100
Total net sales	193,808	186,429	369,217	353,329
Segment profit	35,403	30,834	59,360	53,164
Goodwill	307,618	308,467	307,618	308,467
Swiss Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	28,420	32,179	60,025	63,824
Net Sales to Other Segments	93,750	91,489	191,269	192,751
Total net sales	122,170	123,668	251,294	256,575
Segment profit	26,312	21,978	55,454	51,058
Goodwill	22,530	25,695	22,530	25,695
Western European Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	156,284	167,419	309,289	320,279
Net Sales to Other Segments	24,838	26,089	48,685	51,677
Total net sales	181,122	193,508	357,974	371,956
Segment profit	21,978	20,609	40,243	39,076
Goodwill	100,859	98,076	100,859	98,076
Chinese Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	108,479	95,721	199,773	170,558
Net Sales to Other Segments	26,122	34,433	55,935	64,770
Total net sales	134,601	130,154	255,708	235,328
Segment profit	30,931	34,443	56,249	55,132
Goodwill	716	695	716	695
Other Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	99,918	98,752	202,116	189,964
Net Sales to Other Segments	1,345	1,526	2,994	2,335
Total net sales	101,263	100,278	205,110	192,299
Segment profit	8,506	10,640	18,830	20,107
Goodwill	14,557	14,666	14,557	14,666
Intersegment Elimination [Member]
Operations of the Company's operating segments
Net Sales to External Customers	0	0	0	0
Net Sales to Other Segments	(162,681)	(172,949)	(333,620)	(349,633)
Total net sales	(162,681)	(172,949)	(333,620)	(349,633)
Segment profit	(22,073)	(23,972)	(48,285)	(50,227)
Goodwill	$ 0	$ 0	$ 0	$ 0