Business Segments - Performance of reportable segments (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Net sales	$ 449,072	$ 367,224		$ 1,314,117	$ 1,031,825
Combination, integration and other acquisition-related expenses	(5,786)	(6,913)		(18,259)	(22,786)
Restructuring charges	880	(1,383)		(593)	(3,585)
Fair value step up of acquired inventory sold	0	0		(801)	(226)
Indefinite-lived intangible asset impairment	0	0	$ (38,000)	0	(38,000)
Non-operating and administrative expenses	(38,691)	(39,786)		(122,760)	(110,282)
Depreciation of corporate assets and amortization	(15,767)	(14,062)		(46,855)	(41,547)
Operating income	36,010	34,859		119,720	24,653
Other income (expense), net	647	(239)		19,344	(22,407)
Interest expense, net	(5,637)	(6,837)		(16,725)	(22,109)
Income (loss) before taxes and equity in net income of associated companies	31,020	27,783		122,339	(19,863)
Americas [Member]
Segment Reporting Information [Line Items]
Net sales	196,807	158,737		562,790	445,734
EMEA [Member]
Segment Reporting Information [Line Items]
Net sales	141,494	111,434		426,694	326,149
Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales	110,771	97,053		324,633	259,942
Operating Segments [Member]
Segment Reporting Information [Line Items]
Net sales	371,699	298,422		1,077,758	833,408
Segment operating earnings	95,374	97,003		308,988	241,079
Operating Segments [Member] | Global Specialty Businesses [Member]
Segment Reporting Information [Line Items]
Net sales	77,373	68,802		236,359	198,417
Segment operating earnings	20,663	21,161		69,041	58,114
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Net sales	150,799	119,540		425,343	330,012
Segment operating earnings	31,273	31,099		97,155	70,590
Operating Segments [Member] | Americas [Member] | Global Specialty Businesses [Member]
Segment Reporting Information [Line Items]
Net sales	46,008	39,197		137,447	115,722
Operating Segments [Member] | EMEA [Member]
Segment Reporting Information [Line Items]
Net sales	122,241	94,005		365,491	276,546
Segment operating earnings	20,153	17,439		68,802	46,269
Operating Segments [Member] | EMEA [Member] | Global Specialty Businesses [Member]
Segment Reporting Information [Line Items]
Net sales	19,253	17,429		61,203	49,603
Operating Segments [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales	98,659	84,877		286,924	226,850
Segment operating earnings	23,285	27,304		73,990	66,106
Operating Segments [Member] | Asia Pacific [Member] | Global Specialty Businesses [Member]
Segment Reporting Information [Line Items]
Net sales	12,112	12,176		37,709	33,092
Intersegment Elimination [Member] | Global Specialty Businesses [Member]
Segment Reporting Information [Line Items]
Net sales	1,800	1,100		5,900	3,400
Intersegment Elimination [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Net sales	3,600	1,700		9,300	7,000
Intersegment Elimination [Member] | EMEA [Member]
Segment Reporting Information [Line Items]
Net sales	6,800	5,300		21,900	16,100
Intersegment Elimination [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Net sales	$ 800	$ 200		$ 1,300	$ 500