EARNINGS PER SHARE

Potentially dilutive securities, including non-vested restricted common stock, stock options, and performance units, are excluded from the diluted weighted average shares outstanding computation in periods in which they have an anti-dilutive effect, such as when there is a net loss. The treasury stock method is used to measure the dilutive impact of non-vested restricted common stock, stock options outstanding, and performance units. For the three months ended March 31, 2015, and 2014, 91,621 and 571,609 non-vested weighted average shares of restricted common stock and 320,926 and 335,935 weighted average stock options, respectively, were anti-dilutive and therefore were not included in the diluted weighted average share calculation. For the three months ended March 31, 2015, and 2014, 73,529 and 19,874, respectively, weighted average shares of common stock underlying non-vested performance units were anti-dilutive and therefore were not included in the diluted weighted average share calculation. The following table sets forth the calculation of basic and diluted earnings per share (in thousands, except per share amounts):



	Three Months Ended March 31,
	2015		2014
Net income (loss)	$	6,529	$	(355	)

Basic weighted average common shares outstanding	75,589		75,445
Add: Dilutive effect of non-vested restricted common stock	110		—
Add: Dilutive effect of performance units	8		—
Diluted weighted average common shares outstanding	75,707		75,445

Earnings (Loss) per share:
Basic	$	0.09	$	0.00
Diluted	$	0.09	$	0.00