Segments Table (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Net sales	$ 391,294	$ 325,130	$ 205,869	$ 211,210	$ 211,481	$ 222,022	$ 221,962	$ 212,055	$ 1,133,503	$ 867,520	$ 820,082
Operating Earnings, Excluding Indirect Operating Expenses									251,704	195,475	176,402
Segment assets	2,850,316				709,665				2,850,316	709,665	722,126
Long-Lived Assets	390,628				137,294				390,628	137,294	142,443
Capital Expenditures									15,545	12,886	10,872
Depreciation									17,766	12,196	12,477
Americas [Member]
Segment Reporting Information [Line Items]
Net sales									392,121	297,601	283,460
Operating Earnings, Excluding Indirect Operating Expenses									78,268	62,686	56,088
Segment assets	926,122				180,037				926,122	180,037	189,645
Long-Lived Assets	139,170				60,745				139,170	60,745	66,380
Capital Expenditures									6,404	3,401	3,685
Depreciation									7,500	4,225	4,395
Americas [Member] | Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales									7,300	8,300	9,400
EMEA [Member]
Segment Reporting Information [Line Items]
Net sales									285,570	216,984	208,522
Operating Earnings, Excluding Indirect Operating Expenses									47,388	36,119	34,431
Segment assets	688,663				149,984				688,663	149,984	167,243
Long-Lived Assets	56,108				23,383				56,108	23,383	24,795
Capital Expenditures									3,263	2,081	3,936
Depreciation									4,560	3,434	3,368
EMEA [Member] | Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales									20,300	21,900	20,800
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales									247,839	192,502	181,134
Operating Earnings, Excluding Indirect Operating Expenses									67,573	53,739	46,330
Segment assets	685,476				205,424				685,476	205,424	190,633
Long-Lived Assets	126,166				26,217				126,166	26,217	24,876
Capital Expenditures									3,857	6,059	2,458
Depreciation									3,458	2,552	2,669
Asia Pacific [Member] | Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales									200	500	1,500
Non Domestic [Member]
Segment Reporting Information [Line Items]
Net sales									719,800	534,600	513,100
Long-Lived Assets	174,400				60,800				174,400	60,800	61,800
Global Specialty Businesses [Member]
Segment Reporting Information [Line Items]
Net sales									207,973	160,433	146,966
Operating Earnings, Excluding Indirect Operating Expenses									58,475	42,931	39,553
Segment assets	550,055				174,220				550,055	174,220	174,605
Long-Lived Assets	$ 69,184				$ 26,949				69,184	26,949	26,392
Capital Expenditures									2,021	1,345	793
Depreciation									2,248	1,985	2,045
Global Specialty Businesses [Member] | Intersegment Elimination [Member]
Segment Reporting Information [Line Items]
Net sales									$ 5,400	$ 5,300	$ 4,400