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8. Employee Benefit Plans (Detail) - Schedule of Periodic Benefit Costs (USD $)
In Thousands, unless otherwise specified
3 Months Ended 9 Months Ended
Oct. 28, 2012
Oct. 30, 2011
Oct. 28, 2012
Oct. 30, 2011
Net periodic benefit cost        
Service cost $ 64 $ 131 $ 191 $ 393
Interest cost 74 84 223 252
Actuarial gain (15) (81) (44) (243)
Net periodic benefit cost $ 123 $ 134 $ 370 $ 402