Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income		$ 27,863	$ 15,358	$ 71,736	$ 45,658
Other comprehensive (loss) income, net of tax
Unrealized loss on hedging activities, net of tax	[1]	62	79	(488)	(1,447)
Foreign currency translation adjustments, net of tax	[2]	(25,383)	39,851	(51,669)	23,774
Defined benefit pension and other postretirement benefits, net of tax	[3]	3,640	2,209	10,165	2,667
Total other comprehensive (loss) income, net of tax		(21,681)	42,139	(41,992)	24,994
Total comprehensive income		$ 6,182	$ 57,497	$ 29,744	$ 70,652

[1] Net of tax of $47 and $73 for the three months ended September 30, 2021 and 2020, respectively, and $(106) and $(481) for the nine months ended September 30, 2021 and 2020, respectively.

[2] Net of tax of $0 and $0 for the three months ended September 30, 2021 and 2020, respectively, and $0 and $(66) for the nine months ended September 30, 2021 and 2020, respectively.

[3] Net of tax of $972 and $844 for the three months ended September 30, 2021 and 2020, respectively, and $3,033 and $456 for the nine months ended September 30, 2021 and 2020, respectively.