Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Tax (benefit) provision on foreign currency translation adjustments	$ 0	$ 364	$ 0	$ 239
Tax provision on defined benefit pension plans	25	19	76	56
Tax provision on loss on derivative instrument classified as a cash flow hedge	$ (2)	$ (56)	$ 75	$ (276)