Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Net income	$ 12,912	$ 8,337	$ 28,551	$ 18,650
Other comprehensive income (loss), net of taxes:
Foreign currency translation gain (loss), net of taxes	7,058	3,480	(20,066)	(2,079)
Unrealized gain (loss) on net investment hedges, net of taxes	(1,135)	70	2,768	105
Unrealized actuarial gain (loss) related to pension liability, net of taxes	(20)	42	(28)	21
Unrealized gain (loss) on cash flow hedging instruments, net of taxes	(347)	4,029	1,068	1,287
Unrealized gain (loss) on postretirement obligation, net of taxes	59	12	44	18
Other comprehensive income (loss), net of taxes	5,615	7,633	(16,214)	(648)
Comprehensive income (loss)	$ 18,527	$ 15,970	$ 12,337	$ 18,002