Fair Value Measurements (Details 2) (USD $)				3 Months Ended	9 Months Ended		3 Months Ended	9 Months Ended
	Nov. 01, 2014	Feb. 01, 2014	Feb. 01, 2014 Corporate bonds Short-term investments and other assets	May 03, 2014 Marketable equity securities	Nov. 01, 2014 Marketable equity securities	Feb. 01, 2014 Marketable equity securities Short-term investments and other assets	May 03, 2014 Marketable equity securities Other income/expense	Nov. 01, 2014 Marketable equity securities Other income/expense
Available-for-sale securities
Available-for-sale securities, included in short-term investments and other assets depending on their respective maturity dates			$ 5,100,000			$ 600,000
Proceeds from sale of available-for-sale securities				600,000	600,000
Gains recognized on sale of available-for-sale securities							100,000	100,000
Accumulated unrealized gains (losses), net of tax, included in accumulated other comprehensive income (loss)	$ 0	$ 103,000