Consolidated Statements Of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
Jan. 31, 2015	Feb. 01, 2014	Feb. 02, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 64,641us-gaap_NetIncomeLoss	$ 65,883us-gaap_NetIncomeLoss	$ 180,219us-gaap_NetIncomeLoss
Other comprehensive income (loss):
Unrealized losses on marketable securities, net of taxes	(73)	(146)	(112)
Foreign currency translation adjustment, net of taxes	523	42	0
Comprehensive income	$ 65,091us-gaap_ComprehensiveIncomeNetOfTax	$ 65,779us-gaap_ComprehensiveIncomeNetOfTax	$ 180,107us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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