Shareholders' Equity (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Oct. 27, 2012	Oct. 29, 2011	Oct. 27, 2012	Oct. 29, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 1,500	$ 2,100	$ 4,776	$ 5,116
Shares of common stock issued during the period	52,297		1,360,588
Cancelled shares of common stock as a result of forfeitures of restricted stock awards	32,800		147,300
Restricted Stock, Stock Performance And Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock shares granted	1,276
Weighted-average grant date fair value of stock	$ 16.18