Quarterly Financial Data (Unaudited) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended
Jan. 28, 2012
Oct. 29, 2011
Jul. 30, 2011
Apr. 30, 2011
Jan. 29, 2011
Oct. 30, 2010
Jul. 31, 2010
May 01, 2010
Jan. 28, 2012
Jan. 29, 2011
Jan. 30, 2010
Quarterly Financial Data [Line Items]                      
NET SALES $ 673,153 $ 486,784 $ 446,041 $ 467,377 $ 621,498 $ 450,577 $ 407,277 $ 426,462 $ 2,073,355 $ 1,905,814 $ 1,721,066
Gross profit 250,347 175,968 149,832 178,314 226,778 164,323 130,017 157,206 754,461 678,324 545,978
Net income $ 60,394 $ 32,670 $ 12,620 $ 35,013 $ 48,412 $ 26,301 $ 22,114 $ 30,561 $ 140,697 $ 127,388 $ 75,307
Earnings per basic share $ 0.68 $ 0.37 $ 0.14 $ 0.40 $ 0.55 $ 0.30 $ 0.25 $ 0.40 $ 1.59 $ 1.49 $ 1.01
Earnings per diluted share $ 0.68 $ 0.37 $ 0.14 $ 0.39 $ 0.55 $ 0.30 $ 0.25 $ 0.39 $ 1.58 $ 1.48 $ 1.00