Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income		$ 121,380	$ 118,370	$ 270,527
Other comprehensive (loss) income, net of tax
Unrealized gain (loss) on hedging activities, net of tax (1)	[1]	847	(213)	(87)
Unrealized (loss) gain on hedging activities, tax		227	(45)	272
Foreign currency translation adjustments, net of tax (2)	[2]	(54,232)	(83,168)	19,615
Foreign currency translation adjustment, tax		(1,777)	(3,292)	439
Defined benefit pension and other postretirement benefits, net of tax (3)	[3]	9,586	(42,016)	73,168
Defined benefit pension and other postretirement benefits, tax		3,916	(24,799)	43,109
Total other comprehensive (loss) income, net of tax		(43,799)	(125,397)	92,696
Total comprehensive income (loss)		$ 77,581	$ (7,027)	$ 363,223

[1] Net of tax of $227, $(45) and $272 for the years ended December 31, 2015, 2014 and 2013, respectively.

[2] Net of tax of $(1,777), $(3,292) and $439 for the years ended December 31, 2015, 2014 and 2013, respectively.

[3] Net of tax of $3,916, $(24,799) and $43,109 for the years ended December 31, 2015, 2014 and 2013, respectively.