Segment Reporting (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Operations of the Company's operating segments
Net Sales to External Customers	$ 897,791,000	$ 804,390,000
Revenue Transactions With Other Operating Segments	0	0
Net Sales	897,791,000	804,390,000
Segment Profit	241,245,000	210,672,000
Goodwill	650,118,000	640,687,000	$ 648,622,000
Us Operations segment Member
Operations of the Company's operating segments
Net Sales to External Customers	325,821,000	271,959,000
Revenue Transactions With Other Operating Segments	39,573,000	36,784,000
Net Sales	365,394,000	308,743,000
Segment profit	75,186,000	63,671,000
Goodwill	514,022,000	509,600,000
Swiss Operations segment Member
Operations of the Company's operating segments
Net Sales to External Customers	43,270,000	39,281,000
Revenue Transactions With Other Operating Segments	193,835,000	184,465,000
Net Sales	237,105,000	223,746,000
Segment profit	71,322,000	64,879,000
Goodwill	23,198,000	23,048,000
Western European Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	192,886,000	192,350,000
Revenue Transactions With Other Operating Segments	50,127,000	52,255,000
Net Sales	243,013,000	244,605,000
Segment profit	38,780,000	37,866,000
Goodwill	97,612,000	92,193,000
Chinese Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	182,706,000	156,074,000
Revenue Transactions With Other Operating Segments	80,438,000	69,078,000
Net Sales	263,144,000	225,152,000
Segment profit	84,968,000	72,024,000
Goodwill	709,000	683,000
Other Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	153,108,000	144,726,000
Revenue Transactions With Other Operating Segments	963,000	1,095,000
Net Sales	154,071,000	145,821,000
Segment profit	20,452,000	20,172,000
Goodwill	14,577,000	15,163,000
Intersegment Elimination [Member]
Operations of the Company's operating segments
Net Sales to External Customers	0	0
Revenue Transactions With Other Operating Segments	(364,936,000)	(343,677,000)
Net Sales	(364,936,000)	(343,677,000)
Segment profit	(49,463,000)	(47,940,000)
Goodwill	$ 0	$ 0