(17) 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 years ended December 31, 2018, 2017 and 2016 (in thousands, except per share data):



	Year Ended December 31,
	2018		2017		2016
Numerator
Net income attributable to CAI common stockholders	$	73,472	$	72,060	$	5,997
Denominator
Weighted-average shares used in per share computation - basic		19,562		19,253		19,318
Effect of dilutive securities:
Stock options and restricted stock		260		354		75
Weighted-average shares used in per share computation - diluted		19,822		19,607		19,393

Net income per share attributable to CAI common stockholders:
Basic	$	3.76	$	3.74	$	0.31
Diluted	$	3.71	$	3.68	$	0.31

The calculation of diluted earnings per share for the years ended December 31, 2018, 2017 and 2016, excluded from the denominator 160,163 shares, 458,857 shares and 1,135,711 shares, respectively, of common stock options because their effect would have been anti-dilutive.