Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income		$ 33,212	$ 34,227	$ 62,060	$ 63,303
Other comprehensive (loss) income, net of tax
Unrealized (loss) gain on hedging activities, net of tax (1)	[1]	(282)	189	(430)	301
Foreign currency translation adjustments, net of tax (2)	[2]	(19,603)	23,632	1,110	(16,125)
Defined benefit pension and other postretirement benefits, net of tax (3)	[3]	2,378	1,790	3,697	5,451
Total other comprehensive (loss) income, net of tax		(17,507)	25,611	4,377	(10,373)
Total comprehensive income		15,705	59,838	66,437	52,930
Unrealized (loss) gain on hedging activities, tax		(79)	73	(141)	32
Foreign currency translation adjustment, tax		(83)	830	74	(1,381)
Defined benefit pension and other postretirement benefits, tax		$ 1,018	$ 1,421	$ 1,953	$ 2,767

[1] Net of tax of $(79) and $73 for the three months ended June 30, 2016 and 2015, respectively, and $(141) and $32 for the six months ended June 30, 2016 and 2015, respectively.

[2] Net of tax of $(83) and $830 for the three months ended June 30, 2016 and 2015, respectively, and $74 and $(1,381) for the six months ended June 30, 2016 and 2015, respectively.

[3] Net of tax of $1,018 and $1,421 for the three months ended June 30, 2016 and 2015, respectively, and $1,953 and $2,767 for the six months ended June 30, 2016 and 2015, respectively.