Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 699,907	$ 591,693	$ 418,007
Other comprehensive income:
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax	11,441	(24,601)	(7,252)
Comprehensive income, net of tax:
Comprehensive income	711,348	567,092	410,755
Comprehensive income attributable to noncontrolling interest	0	0	140
Comprehensive income attributable to Copart, Inc.	$ 711,348	$ 567,092	$ 410,615