Accumulated Other Comprehensive Loss - Summary of Accumulated Other Comprehensive Loss (Detail) $ in Thousands	3 Months Ended
	Aug. 01, 2015 USD ($)
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCL at April 25, 2015	$ (60,346)
Other comprehensive loss before reclassifications	(11,275)
Amounts reclassified from AOCL	617
AOCL at August 1, 2015	(71,004)
Cash Flow Hedges [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCL at April 25, 2015	(18,668)
Amounts reclassified from AOCL	617
AOCL at August 1, 2015	(18,051)
Currency Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
AOCL at April 25, 2015	(41,678)
Other comprehensive loss before reclassifications	(11,275)
AOCL at August 1, 2015	$ (52,953)