Earnings Per Share

3 Months Ended

Mar. 31, 2015

Earnings Per Share

Earnings Per Share

10. Earnings Per Share

Basic income per share is calculated by dividing the net income attributable to common shares by the weighted average number of common stock outstanding during the period. Diluted income per share adjusts basic income per share for the effects of potentially dilutive common shares, if the effect is not antidilutive. Potentially dilutive common stock consist of shares issuable under the 2010 Plan. The following is a summary of basic and diluted income per share (in thousands, except share and per share amounts):

	Three Months Ended March 31,
	2015		2014
Net income attributable to common shares	$	4,568	$	2,733
Weighted-average common shares outstanding - basic	21,372,157		20,992,758
Effect of potentially dilutive common shares:
Stock options	382,603		364,158
Unvested awards	223,547		164,922
Weighted-average common shares outstanding - diluted	21,978,307		21,521,838
Net income per share attributable to common shares
Basic	$	0.21	$	0.13
Diluted	$	0.21	$	0.13

In the calculations above, we have excluded weighted-average potentially dilutive securities of 70,153 and 262,473 for the three months ended March 31, 2015, and 2014, respectively, as their effect would have been antidilutive.