Segments and Other Geographic Reporting (Details) $ in Thousands	3 Months Ended
	Oct. 31, 2022 USD ($) segment	Oct. 31, 2021 USD ($)	Jul. 31, 2022 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment	2
Number of reportable segments | segment	2
Service revenues and vehicle sales	$ 893,372	$ 810,132
Yard operations	372,777	298,694
Cost of vehicle sales	151,112	126,408
General and administrative	57,980	54,909
Operating income	311,503	330,121
Depreciation and amortization	39,058	31,760
Capital expenditures and acquisitions	152,655	64,696
Total assets	5,593,677		$ 5,308,864
Goodwill	394,844		401,954
Operating Segments | US | United States
Segment Reporting Information [Line Items]
Service revenues and vehicle sales	748,849	678,461
Yard operations	326,244	256,621
Cost of vehicle sales	92,439	80,342
General and administrative	47,538	46,548
Operating income	282,628	294,949
Depreciation and amortization	34,935	27,725
Capital expenditures and acquisitions	136,283	54,272
Total assets	4,870,941		4,615,788
Goodwill	270,269		270,269
Operating Segments | International | International
Segment Reporting Information [Line Items]
Service revenues and vehicle sales	144,523	131,671
Yard operations	46,533	42,073
Cost of vehicle sales	58,673	46,066
General and administrative	10,442	8,361
Operating income	28,875	35,172
Depreciation and amortization	4,123	4,035
Capital expenditures and acquisitions	16,372	10,424
Total assets	722,736		693,076
Goodwill	124,575		$ 131,685
Service revenues
Segment Reporting Information [Line Items]
Service revenues and vehicle sales	726,840	667,818
Service revenues | Operating Segments | US | United States
Segment Reporting Information [Line Items]
Service revenues and vehicle sales	651,657	590,758
Service revenues | Operating Segments | International | International
Segment Reporting Information [Line Items]
Service revenues and vehicle sales	75,183	77,060
Vehicle sales
Segment Reporting Information [Line Items]
Service revenues and vehicle sales	166,532	142,314
Vehicle sales | Operating Segments | US | United States
Segment Reporting Information [Line Items]
Service revenues and vehicle sales	97,192	87,703
Vehicle sales | Operating Segments | International | International
Segment Reporting Information [Line Items]
Service revenues and vehicle sales	$ 69,340	$ 54,611