Net Sales and Revenue Recognition (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Product Information [Line Items]
Net sales	$ 1,417,677	$ 1,133,503	$ 867,520
Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales	269,030	207,973	160,433
Americas [Member]
Product Information [Line Items]
Net sales	450,161	392,121	297,601
EMEA [Member]
Product Information [Line Items]
Net sales	383,187	285,570	216,984
EMEA [Member] | Product [Member]
Product Information [Line Items]
Net sales	383,187	285,570	216,984
Asia Pacific [Member]
Product Information [Line Items]
Net sales	315,299	247,839	192,502
Asia Pacific [Member] | Product [Member]
Product Information [Line Items]
Net sales	315,299	247,839	192,502
Operating Segments [Member]
Product Information [Line Items]
Net sales	1,417,677	1,133,503	867,520
Operating Segments [Member] | Transferred At Point In Time [Member]
Product Information [Line Items]
Net sales	1,368,129	1,105,304	847,886
Operating Segments [Member] | Transferred Over Time [Member]
Product Information [Line Items]
Net sales	49,548	28,199	19,634
Operating Segments [Member] | Product [Member]
Product Information [Line Items]
Net sales	1,148,647	925,530	707,087
Operating Segments [Member] | Metals [Member]
Product Information [Line Items]
Net sales	439,111	414,259	385,918
Operating Segments [Member] | Metalworking [Member]
Product Information [Line Items]
Net sales	709,536	511,271	321,169
Operating Segments [Member] | Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales	269,030	207,973	160,433
Operating Segments [Member] | Americas [Member]
Product Information [Line Items]
Net sales	604,957	541,549	419,766
Operating Segments [Member] | Americas [Member] | Transferred At Point In Time [Member]
Product Information [Line Items]
Net sales	580,663	525,802	408,402
Operating Segments [Member] | Americas [Member] | Transferred Over Time [Member]
Product Information [Line Items]
Net sales	24,294	15,747	11,364
Operating Segments [Member] | Americas [Member] | Product [Member]
Product Information [Line Items]
Net sales	450,161	392,121	297,601
Operating Segments [Member] | Americas [Member] | Metals [Member]
Product Information [Line Items]
Net sales	163,135	171,784	164,263
Operating Segments [Member] | Americas [Member] | Metalworking [Member]
Product Information [Line Items]
Net sales	287,026	220,337	133,338
Operating Segments [Member] | Americas [Member] | Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales	154,796	149,428	122,165
Operating Segments [Member] | EMEA [Member]
Product Information [Line Items]
Net sales	451,351	315,685	233,597
Operating Segments [Member] | EMEA [Member] | Transferred At Point In Time [Member]
Product Information [Line Items]
Net sales	434,549	310,274	233,372
Operating Segments [Member] | EMEA [Member] | Transferred Over Time [Member]
Product Information [Line Items]
Net sales	16,802	5,411	225
Operating Segments [Member] | EMEA [Member] | Product [Member]
Product Information [Line Items]
Net sales	383,187	285,570	216,984
Operating Segments [Member] | EMEA [Member] | Metals [Member]
Product Information [Line Items]
Net sales	107,880	100,605	101,028
Operating Segments [Member] | EMEA [Member] | Metalworking [Member]
Product Information [Line Items]
Net sales	275,307	184,965	115,956
Operating Segments [Member] | EMEA [Member] | Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales	68,164	30,115	16,613
Operating Segments [Member] | Asia Pacific [Member]
Product Information [Line Items]
Net sales	361,369	276,269	214,157
Operating Segments [Member] | Asia Pacific [Member] | Transferred At Point In Time [Member]
Product Information [Line Items]
Net sales	352,917	269,228	206,112
Operating Segments [Member] | Asia Pacific [Member] | Transferred Over Time [Member]
Product Information [Line Items]
Net sales	8,452	7,041	8,045
Operating Segments [Member] | Asia Pacific [Member] | Product [Member]
Product Information [Line Items]
Net sales	315,299	247,839	192,502
Operating Segments [Member] | Asia Pacific [Member] | Metals [Member]
Product Information [Line Items]
Net sales	168,096	141,870	120,627
Operating Segments [Member] | Asia Pacific [Member] | Metalworking [Member]
Product Information [Line Items]
Net sales	147,203	105,969	71,875
Operating Segments [Member] | Asia Pacific [Member] | Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales	$ 46,070	$ 28,430	$ 21,655