Stock Option Plan and Stock Based Compensation (Details 4) (USD $)	12 Months Ended
	Feb. 28, 2013
Summary stock options outstanding
Number Outstanding, Options Outstanding	363,000
Weighted Average Remaining Contractual Life ( in Years), Options Outstanding	6 years 4 months 24 days
Weight Average Exercise Price, Options Outstanding	$ 15.79
Number Exercisable, Options Exercisable	193,046
Weight Average Exercise Price, Options Exercisable	$ 15.87
Range One [Member]
Summary stock options outstanding
Exercise Prices, Lower range	$ 8.94
Exercise Prices, Upper range	$ 11.67
Number Outstanding, Options Outstanding	61,750
Weighted Average Remaining Contractual Life ( in Years), Options Outstanding	5 years 9 months 18 days
Weight Average Exercise Price, Options Outstanding	$ 9.11
Number Exercisable, Options Exercisable	40,500
Weight Average Exercise Price, Options Exercisable	$ 9.19
Range Two [Member]
Summary stock options outstanding
Exercise Prices, Lower range	$ 14.82
Exercise Prices, Upper range	$ 16.42
Number Outstanding, Options Outstanding	128,707
Weighted Average Remaining Contractual Life ( in Years), Options Outstanding	5 years 9 months 18 days
Weight Average Exercise Price, Options Outstanding	$ 15.73
Number Exercisable, Options Exercisable	56,000
Weight Average Exercise Price, Options Exercisable	$ 16.06
Range Three [Member]
Summary stock options outstanding
Exercise Prices, Lower range	$ 17.57
Exercise Prices, Upper range	$ 19.69
Number Outstanding, Options Outstanding	172,543
Weighted Average Remaining Contractual Life ( in Years), Options Outstanding	7 years
Weight Average Exercise Price, Options Outstanding	$ 18.23
Number Exercisable, Options Exercisable	96,546
Weight Average Exercise Price, Options Exercisable	$ 18.55