Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Statement of Comprehensive Income [Abstract]
Net income		$ 15,358	$ 45,769	$ 45,658	$ 117,377
Other comprehensive income (loss), net of tax
Unrealized gain (loss) on hedging activities, net of tax	[1]	79	(168)	(1,447)	(1,960)
Foreign currency translation adjustments, net of tax	[2]	39,851	(39,289)	23,774	(44,513)
Defined benefit pension and other postretirement benefits, net of tax	[3]	2,209	2,112	2,667	5,648
Total other comprehensive income (loss), net of tax		42,139	(37,345)	24,994	(40,825)
Total comprehensive income		57,497	8,424	70,652	76,552
Unrealized (loss) income on hedging activities, tax		73	(52)	(481)	(607)
Foreign currency translation adjustment, tax		0	(196)	(66)	(230)
Defined benefit pension and other postretirement benefits, tax		$ 844	$ 554	$ 456	$ 1,663

[1] Net of tax of $73 and $(52) for the three months ended September 30, 2020 and 2019, respectively, and $(481) and $(607) for the nine months ended September 30, 2020 and 2019, respectively.

[2] Net of tax of $0 and $(196) for the three months ended September 30, 2020 and 2019, respectively, and $(66) and $(230) for the nine months ended September 30, 2020 and 2019, respectively.

[3] Net of tax of $844 and $554 for the three months ended September 30, 2020 and 2019, respectively, and $456 and $1,663 for the nine months ended September 30, 2020 and 2019, respectively.