Business Segments - Summarized Financial Information of Reportable Segments (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Segment Reporting Information [Line Items]
Revenues from external customers	$ 6,202,917	$ 6,044,135	$ 5,720,042
Net income	366,794	457,443	321,480
Net assets	3,053,543	2,665,278	2,661,310	$ 2,371,466
Goodwill	4,058,291	3,632,578	3,407,110
Total long-term assets	5,419,793	4,841,196	4,456,586
Total assets	6,629,431	6,172,372	5,542,472
Capital expenditures	74,564	73,129	72,303
Depreciation and amortization	134,681	125,363	110,688
Domestic Operations
Segment Reporting Information [Line Items]
Revenues from external customers	6,011,059	5,868,392	5,556,672
Net income	339,381	432,912	302,822
Net assets	2,867,396	2,461,048	2,482,283
Goodwill	3,934,625	3,491,747	3,279,856
Total long-term assets	5,271,444	4,665,782	4,297,885
Total assets	6,380,745	5,898,869	5,293,588
Capital expenditures	72,736	69,610	70,499
Depreciation and amortization	131,401	121,725	105,874
International Operations
Segment Reporting Information [Line Items]
Revenues from external customers	191,858	175,743	163,370
Net income	27,413	24,531	18,658
Net assets	186,147	204,230	179,027
Goodwill	123,666	140,831	127,254
Total long-term assets	148,349	175,414	158,701
Total assets	248,686	273,503	248,884
Capital expenditures	1,828	3,519	1,804
Depreciation and amortization	$ 3,280	$ 3,638	$ 4,814