Quarterly report pursuant to Section 13 or 15(d)

Net income per common share - Additional Information (Detail)

v2.4.0.6
Net income per common share - Additional Information (Detail)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Oct. 27, 2012
Oct. 29, 2011
Oct. 27, 2012
Oct. 29, 2011
Earnings Per Share [Line Items]        
Antidilutive stock option excluded from computation of net income per common share 522 595 596 703