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Derivative Instruments - Financial Information Related to Hedging of Net Assets Included in Consolidated Statement of Earnings (Detail)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 28, 2013
USD ($)
Sep. 29, 2012
USD ($)
Sep. 28, 2013
USD ($)
Sep. 29, 2012
USD ($)
Dec. 31, 2012
USD ($)
Sep. 28, 2013
Foreign Exchange Forward [Member]
Euro/US Dollar [Member]
EUR (€)
Dec. 31, 2012
Foreign Exchange Forward [Member]
Euro/US Dollar [Member]
EUR (€)
Sep. 28, 2013
Foreign Exchange Forward [Member]
Pound/US Dollar [Member]
GBP (£)
Dec. 31, 2012
Foreign Exchange Forward [Member]
Pound/US Dollar [Member]
GBP (£)
Derivative [Line Items]                  
Change in gains (losses) from foreign exchange derivatives $ (1,611) $ (1,649) $ (892) $ (208)          
Gain (loss) on net foreign currency assets 1,438 1,135 159 (728)          
Foreign exchange loss (173) (514) (733) (936)          
Notional balance of outstanding contracts versus the dollar           40,614 37,598 2,476 3,810
Net fair value of outstanding contracts $ (26)   $ (26)   $ 18