Segments and Other Geographic Reporting (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Apr. 30, 2024 USD ($)	Apr. 30, 2023 USD ($)	Apr. 30, 2024 USD ($) segment	Apr. 30, 2023 USD ($)	Jul. 31, 2023 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment			2
Number of reportable segments | segment			2
Total service revenues and vehicle sales	$ 1,127,259	$ 1,021,831	$ 3,167,824	$ 2,871,927
Yard operations	438,873	378,958	1,256,552	1,127,232
Cost of vehicle sales	162,881	159,443	457,596	465,282
General and administrative	88,302	64,506	241,197	183,461
Operating income	437,203	418,924	1,212,479	1,095,952
Depreciation and amortization	50,733	37,371	139,158	114,843
Capital expenditures and acquisitions	87,815	89,805	467,517	346,524
Total assets	8,010,632		8,010,632		$ 6,737,879
Goodwill	511,372		511,372		394,289
Service revenues
Segment Reporting Information [Line Items]
Total service revenues and vehicle sales	946,630	847,249	2,667,911	2,363,886
Service revenues | United States | US
Segment Reporting Information [Line Items]
Total service revenues and vehicle sales	830,680	752,077	2,349,241	2,109,467
Service revenues | International | International
Segment Reporting Information [Line Items]
Total service revenues and vehicle sales	115,950	95,172	318,670	254,419
Vehicle sales
Segment Reporting Information [Line Items]
Total service revenues and vehicle sales	180,629	174,582	499,913	508,041
Vehicle sales | United States | US
Segment Reporting Information [Line Items]
Total service revenues and vehicle sales	88,236	81,681	241,307	261,069
Vehicle sales | International | International
Segment Reporting Information [Line Items]
Total service revenues and vehicle sales	92,393	92,901	258,606	246,972
Operating Segments | United States | US
Segment Reporting Information [Line Items]
Total service revenues and vehicle sales	918,916	833,758	2,590,548	2,370,536
Yard operations	369,577	323,426	1,062,859	973,067
Cost of vehicle sales	81,312	74,951	223,462	246,431
General and administrative	75,096	50,590	201,667	147,456
Operating income	392,931	384,791	1,102,560	1,003,582
Depreciation and amortization	43,477	32,918	118,756	101,974
Capital expenditures and acquisitions	72,186	79,633	372,178	305,344
Total assets	7,034,960		7,034,960		5,825,064
Goodwill	390,903		390,903		270,269
Operating Segments | International | International
Segment Reporting Information [Line Items]
Total service revenues and vehicle sales	208,343	188,073	577,276	501,391
Yard operations	69,296	55,532	193,693	154,165
Cost of vehicle sales	81,569	84,492	234,134	218,851
General and administrative	13,206	13,916	39,530	36,005
Operating income	44,272	34,133	109,919	92,370
Depreciation and amortization	7,256	4,453	20,402	12,869
Capital expenditures and acquisitions	15,629	$ 10,172	95,339	$ 41,180
Total assets	975,672		975,672		912,815
Goodwill	$ 120,469		$ 120,469		$ 124,020