CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income	$ 20,297	$ 12,638	$ 37,435	$ 17,910
Other comprehensive income, net of tax:
Foreign currency translation adjustments	(548)	793	(238)	1,044
Comprehensive income before preferred stock dividends	19,749	13,431	37,197	18,954
Dividends declared on preferred stock	(1,148)		(1,169)
Comprehensive income available to CAI common stockholders	$ 18,601	$ 13,431	$ 36,028	$ 18,954