Segments Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Net sales	$ 1,417,677	$ 1,133,503	$ 867,520
Operating Earnings, Excluding Indirect Operating Expenses	333,588	251,704	195,475
Segment assets	2,891,834	2,850,316	709,665
Long-Lived Assets	369,970	390,628	137,294
Capital Expenditures	17,901	15,545	12,886
Depreciation	27,351	17,766	12,196
Global Specialty Businesses [Member]
Segment Reporting Information [Line Items]
Net sales	269,030	207,973	160,433
Operating Earnings, Excluding Indirect Operating Expenses	79,690	58,881	42,931
Segment assets	511,458	550,055	174,220
Long-Lived Assets	59,091	69,184	26,949
Capital Expenditures	1,918	2,021	1,345
Depreciation	3,544	2,248	1,985
Americas [Member]
Segment Reporting Information [Line Items]
Net sales	450,161	392,121	297,601
Operating Earnings, Excluding Indirect Operating Expenses	96,379	78,297	62,686
Segment assets	969,551	926,122	180,037
Long-Lived Assets	122,302	139,170	60,745
Capital Expenditures	6,451	6,404	3,401
Depreciation	12,322	7,500	4,225
EMEA [Member]
Segment Reporting Information [Line Items]
Net sales	383,187	285,570	216,984
Operating Earnings, Excluding Indirect Operating Expenses	69,163	47,014	36,119
Segment assets	697,821	688,663	149,984
Long-Lived Assets	69,344	56,108	23,383
Capital Expenditures	3,844	3,263	2,081
Depreciation	6,813	4,560	3,434
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales	315,299	247,839	192,502
Operating Earnings, Excluding Indirect Operating Expenses	88,356	67,512	53,739
Segment assets	713,004	685,476	205,424
Long-Lived Assets	119,233	126,166	26,217
Capital Expenditures	5,688	3,857	6,059
Depreciation	4,672	3,458	2,552
Non Domestic [Member]
Segment Reporting Information [Line Items]
Net sales	963,200	719,800	534,600
Long-Lived Assets	176,600	174,400	60,800
Intersegment Elimination [Member] | Global Specialty Businesses [Member]
Segment Reporting Information [Line Items]
Net sales	4,700	5,400	5,300
Intersegment Elimination [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Net sales	9,100	7,300	8,300
Intersegment Elimination [Member] | EMEA [Member]
Segment Reporting Information [Line Items]
Net sales	22,000	20,300	21,900
Intersegment Elimination [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales	600	200	500
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	1,417,677	1,133,503	867,520
Operating Segments [Member] | Global Specialty Businesses [Member]
Segment Reporting Information [Line Items]
Net sales	269,030	207,973	160,433
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Net sales	604,957	541,549	419,766
Operating Segments [Member] | Americas [Member] | Global Specialty Businesses [Member]
Segment Reporting Information [Line Items]
Net sales	154,796	149,428	122,165
Operating Segments [Member] | EMEA [Member]
Segment Reporting Information [Line Items]
Net sales	451,351	315,685	233,597
Operating Segments [Member] | EMEA [Member] | Global Specialty Businesses [Member]
Segment Reporting Information [Line Items]
Net sales	68,164	30,115	16,613
Operating Segments [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales	361,369	276,269	214,157
Operating Segments [Member] | Asia Pacific [Member] | Global Specialty Businesses [Member]
Segment Reporting Information [Line Items]
Net sales	$ 46,070	$ 28,430	$ 21,655