CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Income Statement [Abstract]
Revenues	$ 7,659,832	$ 6,702,546	$ 6,202,917
Costs of revenues:
Direct costs	5,147,540	4,402,728	4,051,188
Indirect costs and selling expenses	1,720,439	1,590,754	1,520,719
Depreciation and amortization	142,145	141,564	134,681
Total costs of revenues	7,010,124	6,135,046	5,706,588
Income from operations	649,708	567,500	496,329
Interest expense and other, net	105,059	83,861	41,757
Income before income taxes	544,649	483,639	454,572
Income taxes	124,725	98,904	87,778
Net income	$ 419,924	$ 384,735	$ 366,794
Basic earnings per share (in dollars per shares)	$ 18.76	$ 16.59	$ 15.64
Diluted earnings per share (in dollars per shares)	$ 18.60	$ 16.43	$ 15.49
Weighted-average basic shares outstanding (in shares)	22,381	23,196	23,446
Weighted-average diluted shares outstanding (in shares)	22,573	23,413	23,677