Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income		$ 38,303	$ 28,848
Other comprehensive income, net of tax
Unrealized gain (loss) on hedging activities, net of tax (1)	[1]	83	(148)
Foreign currency translation adjustments, net of tax (2)	[2]	18,609	20,713
Defined benefit pension and other postretirement benefits, net of tax (3)	[3]	1,265	1,318
Total other comprehensive income, net of tax		19,957	21,883
Total comprehensive income		58,260	50,731
Unrealized (loss) income on hedging activities, tax		38	(62)
Foreign currency translation adjustment, tax		67	156
Defined benefit pension and other postretirement benefits, tax		$ 901	$ 935

[1] Net of tax of $38 and $(62) for the three months ended March 31, 2017 and 2016, respectively.

[2] Net of tax of $67 and $156 for the three months ended March 31, 2017 and 2016, respectively.

[3] Net of tax of $901 and $935 for the three months ended March 31, 2017 and 2016, respectively.