(15) Earnings Per Share

Basic earnings per share is computed by dividing income available to common stockholders by the weighted average number of common shares outstanding for the period. Diluted earnings per share reflects the potential dilution that would occur if securities or other contracts to issue common stock were exercised or converted into common stock; however, potential common equivalent shares are excluded if their effect is anti-dilutive.

The following table sets forth the reconciliation of basic and diluted net income per share for the three and six months ended June 30, 2018 and 2017 (in thousands, except per share data):



	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
Numerator
Net income attributable to CAI common stockholders	$	19,149	$	12,638	$	36,266	$	17,910
Denominator
Weighted-average shares used in per share computation - basic		19,613		19,131		20,013		19,071
Effect of dilutive securities:
Stock options and restricted stock		230		288		245		261
Weighted-average shares used in per share computation - diluted		19,843		19,419		20,259		19,332

Net income per share attributable to CAI common stockholders:
Basic	$	0.98	$	0.66	$	1.81	$	0.94
Diluted	$	0.97	$	0.65	$	1.79	$	0.93

The calculation of diluted earnings per share for the three months ended June 30, 2018 and 2017, excluded from the denominator 161,870 and 858,739 shares, respectively, of common stock options because their effect would have been anti-dilutive. The calculation of diluted earnings per share for the six months ended June 30, 2018 and 2017, excluded from the denominator 161,163 and 936,486 shares, respectively, of common stock options because their effect would have been anti-dilutive.