CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income	$ 14,928	$ 13,643
Foreign currency translation adjustment	10,926	(27,980)
Derivative instruments designated as cash flow hedges:
Unrealized gain (loss) on derivative instruments held at period end, net of tax (Note 6)	4	218
Unrealized gain (loss) reclassified into earnings (Note 6)	2	0
Pension and postretirement benefit plans reclassified into earnings, net of tax (Note 6):
Amortization of loss	35	268
Other comprehensive income (loss)	10,967	(27,494)
Comprehensive income (loss)	$ 25,895	$ (13,851)