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Stock Option Plan and Stock Based Compensation - Stock Option Activity (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Feb. 28, 2014
Feb. 28, 2013
Feb. 29, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]      
Number of Shares, Options Outstanding, Beginning Balance 363,000 310,193 261,900
Number of Shares, Granted 36,155 72,707 82,743
Number of Shares, Terminated (7,750) (11,400) (2,500)
Number of Shares, Exercised (22,000) (8,500) (31,950)
Number of Shares, Options Outstanding, Ending Balance 369,405 363,000 310,193
Weighted Average Exercise Price, Beginning Balance $ 15.79 $ 15.60 $ 14.31
Weighted Average Exercise Price, Granted $ 14.05 $ 15.48 $ 17.57
Weighted Average Exercise Price, Terminated $ 13.30 $ 13.57 $ 8.94
Weighted Average Exercise Price, Exercised $ 12.59 $ 8.94 $ 10.68
Weighted Average Exercise Price, Ending Balance $ 15.86 $ 15.79 $ 15.60
Weighted Average Remaining Contractual Life, Beginning Balance 6 years 4 months 24 days 6 years 7 months 6 days 6 years 6 months
Weighted Average Remaining Contractual Life, Ending Balance 6 years 6 years 4 months 24 days 6 years 7 months 6 days
Aggregate Intrinsic Value, Beginning Balance $ 421 $ 626 $ 757
Aggregate Intrinsic Value, Ending Balance 416 421 626
Number of Shares, Exercisable 257,194    
Weighted Average Exercise Price, Exercisable $ 16.01    
Weighted Average Remaining Contractual Life, Exercisable 5 years 1 month 6 days    
Aggregate Intrinsic Value, Exercisable $ 337