Earnings Per Share (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Oct. 27, 2012		Oct. 29, 2011		Oct. 27, 2012		Oct. 29, 2011
Summary of basic and diluted earnings per share
Earnings from continuing operations, Income (Numerator)	$ 40,969		$ 26,161		$ 72,321		$ 41,486
Less: Preferred stock dividends, Income (Numerator)	(33)		(49)		(114)		(147)
Basic EPS
Income available to common shareholders, Income (Numerator)	40,936		26,112		72,207		41,339
Income available to common shareholders, Shares (Denominator)	23,584		23,407		23,653		23,158
Income available to common shareholders, Per-Share Amount	$ 1.74		$ 1.12		$ 3.05		$ 1.79
Effect of Dilutive Securities
Options and restricted stock, Shares (Denominator)	331		464		386		496
Convertible preferred stock, Income (Numerator)	22	[1]	37	[1]	66	[2]	41	[2]
Convertible preferred stock, Shares (Denominator)	34	[1]	57	[1]	34	[2]	25	[2]
Employees' preferred stock, Shares (Denominator)	47	[3]	48	[3]	48	[4]	49	[4]
Diluted EPS
Income available to common shareholders plus assumed conversions, Income (Numerator)	$ 40,958		$ 26,149		$ 72,273		$ 41,380
Income available to common shareholders plus assumed conversions, Shares (Denominator)	23,996		23,976		24,121		23,728
Income available to common shareholders plus assumed conversions, Per-Share Amount	$ 1.71		$ 1.09		$ 3.00		$ 1.74

[1] The amount of the dividend on the convertible preferred stock per common share obtainable on conversion of the convertible preferred stock was less than basic earnings per share for all periods presented. Therefore, conversion of these convertible preferred stocks were included in diluted earnings per share. The shares convertible to common stock for Series 1, 3 and 4 preferred stock would have been 13,502, 15,575 and 4,920, respectively, as of October 27, 2012.

[2] The amount of the dividend on the convertible preferred stock per common share obtainable on conversion of the convertible preferred stock was less than basic earnings per share for all preferred stocks for the nine months ended October 27, 2012 and for Series 3 preferred stock for the nine months ended October 29, 2011. Therefore, conversion of all the preferred shares were included in diluted earnings per share for the nine months ended October 27, 2012 and conversion of Series 3 preferred stock was included in diluted earnings per share for the nine months ended October 29, 2011. The amount of the dividend on the convertible preferred stock per common share obtainable on conversion of the convertible preferred stock was higher than basic earnings per share for Series 1 and 4 preferred stock for the nine months ended October 29, 2011. Therefore, conversion of the Series 1 and 4 convertible preferred stocks for the nine months ended October 29, 2011 were not reflected in diluted earnings per share because it would have been antidilutive. The shares convertible to common stock for Series 1, 3 and 4 preferred stock would have been 13,502, 15,575 and 4,920, respectively, as of October 27, 2012.

[3] The Company's Employees' Subordinated Convertible Preferred Stock is convertible one for one to the Company's common stock. Because there are no dividends paid on this stock, these shares are assumed to be converted for the third quarters ended October 27, 2012 and October 29, 2011.

[4] The Company's Employees' Subordinated Convertible Preferred Stock is convertible one for one to the Company's common stock. Because there are no dividends paid on this stock, these shares are assumed to be converted for the nine months ended October 27, 2012 and October 29, 2011.