Earnings Per Share - Basic and Diluted Income Per Common Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	May 03, 2014	May 04, 2013
Basic Earnings Per Common Share:
Net income	$ 14,075	$ 14,692
Income allocated to participating securities	295	337
Net income available to common shareholders	13,780	14,355
Basic weighted-average shares outstanding	43,829	42,814
Basic earnings per share	$ 0.31	$ 0.34
Diluted Earnings Per Common Share:
Net income	14,075	14,692
Income allocated to participating securities	292	334
Net income available to common shareholders	$ 13,783	$ 14,358
Basic weighted-average shares outstanding	43,829	42,814
Incremental shares from share-based compensation plans	627	448
Diluted weighted-average shares outstanding	44,456	43,262
Diluted earnings per share	$ 0.31	$ 0.33