Earnings Per Share

3 Months Ended

Mar. 31, 2017

10. Earnings Per Share

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


	Three Months Ended March 31,
	2017		2016
Net income attributable to common shares	$	16,292	$	11,261
Weighted-average common shares outstanding - basic		33,558,787		30,252,693
Effect of potentially dilutive common shares:
Stock options		156,035		200,379
Unvested awards		266,954		241,675
Weighted-average common shares outstanding - diluted		33,981,776		30,694,747
Net income per share attributable to common shares
Basic	$	0.49	$	0.37
Diluted	$	0.48	$	0.37

In the calculations above, we have excluded weighted-average potentially dilutive securities of 39,937 and 59,408 for the three months ended March 31, 2017, and 2016, respectively, as their effect would have been antidilutive.