Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income		$ 45,769	$ 39,109	$ 117,377	$ 127,357
Other comprehensive (loss) income, net of tax
Unrealized (loss) gain on hedging activities, net of tax (1)	[1]	(168)	1,075	(1,960)	1,886
Foreign currency translation adjustments, net of tax (2)	[2]	(39,289)	1,737	(44,513)	(36,670)
Defined benefit pension and other postretirement benefits, net of tax (3)	[3]	2,112	2,193	5,648	8,382
Total other comprehensive (loss) income, net of tax		(37,345)	5,005	(40,825)	(26,402)
Total comprehensive income		8,424	44,114	76,552	100,955
Unrealized (loss) income on hedging activities, tax		(52)	315	(607)	593
Foreign currency translation adjustment, tax		(196)	43	(230)	(119)
Defined benefit pension and other postretirement benefits, tax		$ 554	$ 750	$ 1,663	$ 2,813

[1] Net of tax of $(52) and $315 for the three months ended September 30, 2019 and 2018, respectively, and $(607) and $593 for the nine months ended September 30, 2019 and 2018, respectively.

[2] Net of tax of $(196) and $43 for the three months ended September 30, 2019 and 2018, respectively, and $(230) and $(119) for the nine months ended September 30, 2019 and 2018, respectively.

[3] Net of tax of $554 and $750 for the three months ended September 30, 2019 and 2018, respectively, and $1,663 and $2,813 for the nine months ended September 30, 2019 and 2018, respectively.