Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Reconciliation Of Basic And Diluted Net Income Per Share

	Year Ended December 31,
	2017		2016		2015
Numerator
Net income attributable to CAI common stockholders used in the calculation
of basic and diluted earnings per share	$	72,060	$	5,997	$	26,601
Denominator
Weighted-average shares used in the calculation of basic earnings per share		19,253		19,318		20,773
Effect of dilutive securities:
Stock options and restricted stock		354		75		215
Weighted-average shares used in the calculation of diluted earnings per share		19,607		19,393		20,988
Net income per share attributable to CAI common stockholders:
Basic	$	3.74	$	0.31	$	1.28
Diluted	$	3.68	$	0.31	$	1.27