Net Sales and Revenue Recognition (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Product Information [Line Items]
Net sales	$ 449,072	$ 367,224	$ 1,314,117	$ 1,031,825
Product sales at a point in time [Member]
Product Information [Line Items]
Net sales	428,881	355,573	1,254,365	998,788
Services transferred over time [Member]
Product Information [Line Items]
Net sales	20,191	11,651	59,752	33,037
Americas [Member]
Product Information [Line Items]
Net sales	196,807	158,737	562,790	445,734
Americas [Member] | Product sales at a point in time [Member]
Product Information [Line Items]
Net sales	188,340	153,820	537,161	431,266
Americas [Member] | Services transferred over time [Member]
Product Information [Line Items]
Net sales	8,467	4,917	25,629	14,468
EMEA [Member]
Product Information [Line Items]
Net sales	141,494	111,434	426,694	326,149
EMEA [Member] | Product sales at a point in time [Member]
Product Information [Line Items]
Net sales	131,982	107,093	400,982	313,511
EMEA [Member] | Services transferred over time [Member]
Product Information [Line Items]
Net sales	9,512	4,341	25,712	12,638
Asia Pacific [Member]
Product Information [Line Items]
Net sales	110,771	97,053	324,633	259,942
Asia Pacific [Member] | Product sales at a point in time [Member]
Product Information [Line Items]
Net sales	108,559	94,660	316,222	254,011
Asia Pacific [Member] | Services transferred over time [Member]
Product Information [Line Items]
Net sales	2,212	2,393	8,411	5,931
Operating Segments [Member]
Product Information [Line Items]
Net sales	371,699	298,422	1,077,758	833,408
Operating Segments [Member] | Metals [Member]
Product Information [Line Items]
Net sales	149,431	112,461	415,881	323,638
Operating Segments [Member] | Metalworking and other [Member]
Product Information [Line Items]
Net sales	222,268	185,961	661,877	509,770
Operating Segments [Member] | Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales	77,373	68,802	236,359	198,417
Operating Segments [Member] | Americas [Member]
Product Information [Line Items]
Net sales	150,799	119,540	425,343	330,012
Operating Segments [Member] | Americas [Member] | Metals [Member]
Product Information [Line Items]
Net sales	56,954	42,098	155,546	121,458
Operating Segments [Member] | Americas [Member] | Metalworking and other [Member]
Product Information [Line Items]
Net sales	93,845	77,442	269,797	208,554
Operating Segments [Member] | Americas [Member] | Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales	46,008	39,197	137,447	115,722
Operating Segments [Member] | EMEA [Member]
Product Information [Line Items]
Net sales	122,241	94,005	365,491	276,546
Operating Segments [Member] | EMEA [Member] | Metals [Member]
Product Information [Line Items]
Net sales	38,483	25,362	108,391	80,174
Operating Segments [Member] | EMEA [Member] | Metalworking and other [Member]
Product Information [Line Items]
Net sales	83,758	68,643	257,100	196,372
Operating Segments [Member] | EMEA [Member] | Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales	19,253	17,429	61,203	49,603
Operating Segments [Member] | Asia Pacific [Member]
Product Information [Line Items]
Net sales	98,659	84,877	286,924	226,850
Operating Segments [Member] | Asia Pacific [Member] | Metals [Member]
Product Information [Line Items]
Net sales	53,994	45,001	151,944	122,006
Operating Segments [Member] | Asia Pacific [Member] | Metalworking and other [Member]
Product Information [Line Items]
Net sales	44,665	39,876	134,980	104,844
Operating Segments [Member] | Asia Pacific [Member] | Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales	$ 12,112	$ 12,176	$ 37,709	$ 33,092