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Shareholders' Equity (Schedule of Changes in Unvested Restricted Stock and Restricted Stock Unit Awards) (Details) - $ / shares
12 Months Ended
Jan. 31, 2016
Feb. 01, 2015
Feb. 02, 2014
Unvested Shares      
Unvested 544,600 975,900 1,238,200
Granted 375,500 129,700 300,200
Vested (327,800) (480,700) (509,900)
Forfeited (80,700) (80,300) (52,600)
Unvested 511,600 544,600 975,900
Weighted Average Grant Date Fair Value      
Unvested $ 13.65 $ 11.73 $ 8.65
Granted 20.38 19.13 18.14
Vested 13.78 11.45 8.46
Forfeited 15.67 12.35 7.38
Unvested $ 18.19 $ 13.65 $ 11.73