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Derivative Instruments and Hedging Activities (Details 3) - USD ($) $ in Thousands	Jul. 31, 2015	Aug. 01, 2014
Assets
Gross Amounts of Recognized Assets	$ 8,034	$ 1,633
Gross Liabilities Offset in the Balance Sheet	(235)	(48)
Net Amounts of Assets Presented in the Balance Sheet	7,799	1,585
Liabilities
Gross Amounts of Recognized Liabilities	(2,463)	(1,261)
Gross Assets Offset in the Balance Sheet	232	86
Net Amounts of Liabilities Presented in the Balance Sheet	(2,231)	(1,175)
Forward currency contracts
Assets
Gross Amounts of Recognized Assets	5,855	1,572
Gross Liabilities Offset in the Balance Sheet	(235)	(48)
Net Amounts of Assets Presented in the Balance Sheet	5,620	1,524
Liabilities
Gross Amounts of Recognized Liabilities	(2,220)	(560)
Gross Assets Offset in the Balance Sheet	232	86
Net Amounts of Liabilities Presented in the Balance Sheet	(1,988)	(474)
Cross currency contract
Assets
Gross Amounts of Recognized Assets	2,179	61
Net Amounts of Assets Presented in the Balance Sheet	2,179	61
Liabilities
Gross Amounts of Recognized Liabilities	(243)	(701)
Net Amounts of Liabilities Presented in the Balance Sheet	$ (243)	$ (701)

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