Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income		$ 24,491	$ 567	$ 43,873	$ 30,300
Other comprehensive income (loss), net of tax
Unrealized loss on hedging activities, net of tax	[1]	102	811	(550)	(1,526)
Foreign currency translation adjustments, net of tax	[2]	21,596	20,256	(26,286)	(16,077)
Defined benefit pension and other postretirement benefits, net of tax	[3]	2,893	(4,023)	6,525	458
Total other comprehensive income (loss), net of tax		24,591	17,044	(20,311)	(17,145)
Total comprehensive income		$ 49,082	$ 17,611	$ 23,562	$ 13,155

[1] Net of tax of $31 and $269 for the three months ended June 30, 2021 and 2020, respectively, and $(153) and $(554) for the six months ended June 30, 2021 and 2020, respectively.

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

[3] Net of tax of $992 and $(1,198) for the three months ended June 30, 2021 and 2020, respectively, and $2,061 and $(388) for the six months ended June 30, 2021 and 2020, respectively.