CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME [Abstract]
Net income	$ 9,335	$ 20,297	$ 27,909	$ 37,435
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments	5	(548)	(76)	(238)
Comprehensive income before preferred stock dividends	9,340	19,749	27,833	37,197
Dividends on preferred stock	(2,207)	(1,148)	(4,414)	(1,169)
Comprehensive income available to CAI common stockholders	$ 7,133	$ 18,601	$ 23,419	$ 36,028