EARNINGS PER SHARE

6 Months Ended

Jun. 30, 2019

Basic earnings per share is computed by dividing the net income (loss) by the weighted average number of common shares outstanding during the period. Diluted earnings per share is calculated based on the combined weighted average number of common shares and potentially dilutive shares, which include the assumed exercise of employee stock options, unvested restricted stock awards, unvested restricted stock units and unvested performance stock units, including market-based performance units based on the expected achievement of performance targets. In computing diluted earnings per share, we utilize the treasury stock method.

A summary of the numerator and denominators used in the computation of earnings per share follows:



	Three Months Ended June 30,						Six Months Ended June 30,
	2019			2018			2019			2018
Numerator:
Net income (loss)	$	11,915		$	1,704		$	10,201		$	(2,206	)
Denominators:
Number of shares outstanding, end of period:
Class A common stock	46,599			41,765			46,599			41,765
Class B common stock	988			988			988			988
Shares to be issued - acquisition	36			—			36			—
Unvested restricted stock	(9		)	(38		)	(9		)	(38		)
Effect of weighted average shares outstanding	(150		)	(54		)	(921		)	(199		)
Basic weighted average common shares outstanding	47,464			42,661			46,693			42,516
Impact of potentially dilutive securities:
Dilutive effect of stock options and other stock awards	757			1,255			731			—
Diluted weighted average common shares outstanding	48,221			43,916			47,424			42,516
Anti-dilutive potentially issuable shares	—			—			154			2,105