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Components of Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Apr. 02, 2011
Comprehensive Income (Loss) [Line Items]
Net earnings	$ 22,095	$ 17,825
Currency translation adjustment	5,985	559
Pension liability adjustment	(28)
Unrealized gain on interest rate swaps, net of tax	42	74
Comprehensive income	$ 28,094	$ 18,458

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