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Earnings Per Share (Details) (USD $)	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Earnings Per Share [Abstract]
Numerator for earnings per share net income	$ 5,373,525	$ 5,302,793
Denominator:
Denominator for basic earnings per share weighted average shares	11,940,200	11,651,295
Effect of dilutive securities:
Stock options and other share awards	238,640	314,167
Denominator for diluted earnings per share	12,178,840	11,965,462
Earnings per share:
Basic	$ 0.45	$ 0.46
Diluted	$ 0.44	$ 0.44

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