CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Revenues	$ 6,702,546	$ 6,202,917	$ 6,044,135
Costs of revenues:
Direct costs	4,402,728	4,051,188	3,930,707
Indirect costs and selling expenses	1,590,754	1,520,719	1,448,614
Depreciation and amortization	141,564	134,681	125,363
Total costs of revenues	6,135,046	5,706,588	5,504,684
Income from operations	567,500	496,329	539,451
Interest expense and other, net	83,861	41,757	39,836
Income before income taxes	483,639	454,572	499,615
Income taxes	98,904	87,778	42,172
Net income	$ 384,735	$ 366,794	$ 457,443
Basic earnings per share (in dollars per shares)	$ 16.59	$ 15.64	$ 18.52
Diluted earnings per share (in dollars per shares)	$ 16.43	$ 15.49	$ 18.30
Weighted-average basic shares outstanding (in shares)	23,196	23,446	24,705
Weighted-average diluted shares outstanding (in shares)	23,413	23,677	24,992