Components of Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Nov. 02, 2013	Oct. 27, 2012	Nov. 02, 2013	Oct. 27, 2012
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Net income	$ 6,145	$ 9,294	$ 12,721	$ 14,052
Weighted average basic shares outstanding	27,884	27,658	27,768	24,979
Dilutive effect of stock options and restricted stock	282	421	323	424
Weighted average common shares for diluted earnings per share	28,166	28,079	28,091	25,403
Class A and Class B common stock
Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items]
Basic earnings per share	$ 0.22	$ 0.34	$ 0.46	$ 0.56
Diluted earnings per share	$ 0.22	$ 0.33	$ 0.45	$ 0.55