Net Sales and Revenue Recognition (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
Product 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
Americas [Member]
Product Information [Line Items]
Net sales									392,121	297,601	283,460
EMEA [Member]
Product Information [Line Items]
Net sales									285,570	216,984	208,522
Asia Pacific [Member]
Product Information [Line Items]
Net sales									247,839	192,502	181,134
Transferred At Point In Time [Member]
Product Information [Line Items]
Net sales									1,105,304	847,886
Transferred At Point In Time [Member] | Americas [Member]
Product Information [Line Items]
Net sales									525,802	408,402
Transferred At Point In Time [Member] | EMEA [Member]
Product Information [Line Items]
Net sales									310,274	233,372
Transferred At Point In Time [Member] | Asia Pacific [Member]
Product Information [Line Items]
Net sales									269,228	206,112
Transferred Over Time [Member]
Product Information [Line Items]
Net sales									28,199	19,634
Transferred Over Time [Member] | Americas [Member]
Product Information [Line Items]
Net sales									15,747	11,364
Transferred Over Time [Member] | EMEA [Member]
Product Information [Line Items]
Net sales									5,411	225
Transferred Over Time [Member] | Asia Pacific [Member]
Product Information [Line Items]
Net sales									7,041	8,045
Product [Member]
Product Information [Line Items]
Net sales									925,530	707,087
Product [Member] | EMEA [Member]
Product Information [Line Items]
Net sales									285,570	216,984	208,522
Product [Member] | Asia Pacific [Member]
Product Information [Line Items]
Net sales									247,839	192,502	$ 181,134
Primary Metals [Member]
Product Information [Line Items]
Net sales									414,259	385,918
Primary Metals [Member] | Americas [Member]
Product Information [Line Items]
Net sales									171,784	164,263
Primary Metals [Member] | EMEA [Member]
Product Information [Line Items]
Net sales									100,605	101,028
Primary Metals [Member] | Asia Pacific [Member]
Product Information [Line Items]
Net sales									141,870	120,627
Metalworking [Member]
Product Information [Line Items]
Net sales									511,271	321,169
Metalworking [Member] | Americas [Member]
Product Information [Line Items]
Net sales									220,337	133,338
Metalworking [Member] | EMEA [Member]
Product Information [Line Items]
Net sales									184,965	115,956
Metalworking [Member] | Asia Pacific [Member]
Product Information [Line Items]
Net sales									105,969	71,875
Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales									207,973	160,433
Global Specialty Businesses [Member] | Americas [Member]
Product Information [Line Items]
Net sales									149,428	122,165
Global Specialty Businesses [Member] | EMEA [Member]
Product Information [Line Items]
Net sales									30,115	16,613
Global Specialty Businesses [Member] | Asia Pacific [Member]
Product Information [Line Items]
Net sales									28,430	21,655
Total Sales With Global Specialty Businesses [Member]
Product Information [Line Items]
Net sales									1,133,503	867,520
Total Sales With Global Specialty Businesses [Member] | Americas [Member]
Product Information [Line Items]
Net sales									541,549	419,766
Total Sales With Global Specialty Businesses [Member] | EMEA [Member]
Product Information [Line Items]
Net sales									315,685	233,597
Total Sales With Global Specialty Businesses [Member] | Asia Pacific [Member]
Product Information [Line Items]
Net sales									$ 276,269	$ 214,157