Activity of Auction Rate Securities, Fair Value Measured using Level Three Inputs (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	May 04, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Redemptions	$ 50	[1]
Unrealized gains (losses) included in other comprehensive (loss) income	(6)
Recovery in fair value occurred	$ 10

[1] Redemptions of $50,000 occurred during the first quarter of fiscal 2013.