Segment Reporting (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020
Operations of the Company's operating segments
Net Sales to External Customers	$ 985,846	$ 951,950	$ 2,862,024	$ 2,680,691
Revenue Transactions With Other Operating Segments	0	0	0	0
Net Sales	985,846	951,950	2,862,024	2,680,691
Segment Profit	307,170	272,810	833,847	738,738
Goodwill	636,089		636,089		$ 648,622	$ 639,184
Swiss Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	40,972	41,850	126,304	121,967
Revenue Transactions With Other Operating Segments	207,349	208,411	611,632	594,057
Net Sales	248,321	250,261	737,936	716,024
Segment profit	77,457	78,454	220,791	212,849
Goodwill	21,950		21,950			23,319
Western European Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	180,959	198,632	564,108	592,704
Revenue Transactions With Other Operating Segments	49,486	52,259	147,087	160,386
Net Sales	230,445	250,891	711,195	753,090
Segment profit	38,950	40,288	112,963	116,630
Goodwill	86,222		86,222			91,228
Chinese Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	229,722	210,460	642,237	572,055
Revenue Transactions With Other Operating Segments	79,285	79,001	234,847	220,608
Net Sales	309,007	289,461	877,084	792,663
Segment profit	123,345	108,636	313,769	275,323
Goodwill	606		606			696
Other Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	160,429	164,300	468,645	461,988
Revenue Transactions With Other Operating Segments	705	835	2,377	3,207
Net Sales	161,134	165,135	471,022	465,195
Segment profit	20,603	24,381	63,298	65,967
Goodwill	13,254		13,254			14,999
Intersegment Elimination [Member]
Operations of the Company's operating segments
Net Sales to External Customers	0	0	0	0
Revenue Transactions With Other Operating Segments	(371,902)	(377,401)	(1,110,908)	(1,090,444)
Net Sales	(371,902)	(377,401)	(1,110,908)	(1,090,444)
Segment profit	(47,008)	(51,587)	(138,779)	(147,612)
Goodwill	0		0			0
US Operations [Member]
Operations of the Company's operating segments
Net Sales to External Customers	373,764	336,708	1,060,730	931,977
Revenue Transactions With Other Operating Segments	35,077	36,895	114,965	112,186
Net Sales	408,841	373,603	1,175,695	1,044,163
Segment profit	93,823	$ 72,638	261,805	$ 215,581
Goodwill	$ 514,057		$ 514,057			$ 508,942