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Securities Available for Sale - Fair Value, Amortized Cost and Gross Unrealized Gains and Losses of the Securities (Detail) (State and Municipal Obligations [Member], USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
May 03, 2014
Jan. 31, 2014
State and Municipal Obligations [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Amortized Cost $ 18,422 $ 18,729
Gross Unrealized Gains 35 37
Gross Unrealized Losses (2)   
Fair Value $ 18,455 $ 18,766