Earnings per Share

9 Months Ended

Oct. 31, 2011

Earnings Per Share [Abstract]

Earnings per Share

12. Earnings per Share

Net income per basic common share is computed using the weighted average number of common shares outstanding during the period, excluding unvested restricted stock. Net income per diluted common share is computed using the weighted average number of common shares and dilutive potential common shares outstanding during the period using the treasury stock method. Potential common shares result from the assumed exercise of outstanding common stock options having a dilutive effect and from the assumed vesting of unvested shares of restricted stock. The following table presents the calculation of basic and diluted weighted average common shares used in the earnings per share calculation for the three and nine months ended October 31, 2011 and 2010:

	Three Months Ended October 31,				For the Nine Months Ended October 31,
	2011		2010		2011		2010
	(in thousands)				(in thousands)
Basic weighted average common shares outstanding		12,381		9,916		11,091		9,854
Stock options		586		268		581		261
Unvested restricted stock		15		19		17		7
Total weighted average common share equivalents		601		287		598		268
Diluted weighted average common shares outstanding		12,982		10,203		11,689		10,122