Assets and Liabilities Measured at Fair value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Dec. 28, 2012	Mar. 30, 2012
Assets
Cash equivalents	$ 58,166	$ 70,379
Total assets measured at fair value on a recurring basis	58,166	70,379
Liabilities
Foreign currency forward contracts	179	443
Total liabilities measured at fair value on a recurring basis	179	443
Fair Value, Inputs, Level 1 [Member]
Assets
Cash equivalents	58,166	70,379
Total assets measured at fair value on a recurring basis	58,166	70,379
Liabilities
Foreign currency forward contracts
Total liabilities measured at fair value on a recurring basis
Fair Value, Inputs, Level 2 [Member]
Assets
Cash equivalents
Total assets measured at fair value on a recurring basis
Liabilities
Foreign currency forward contracts	179	443
Total liabilities measured at fair value on a recurring basis	179	443
Fair Value, Inputs, Level 3 [Member]
Assets
Cash equivalents
Total assets measured at fair value on a recurring basis
Liabilities
Foreign currency forward contracts
Total liabilities measured at fair value on a recurring basis