CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Revenues	$ 1,649,416	$ 1,485,778	$ 3,255,175	$ 2,976,676
Costs of revenues:
Direct costs	1,094,314	974,018	2,150,086	1,948,189
Indirect costs and selling expenses	388,303	354,977	770,384	712,083
Depreciation and amortization	35,932	32,676	71,035	65,268
Total costs of revenues	1,518,549	1,361,671	2,991,505	2,725,540
Income from operations	130,867	124,107	263,670	251,136
Interest expense and other, net	19,942	11,009	36,135	21,407
Income before income taxes	110,925	113,098	227,535	229,729
Income taxes	23,824	22,799	51,309	51,321
Net income	$ 87,101	$ 90,299	$ 176,226	$ 178,408
Basic earnings per share	$ 3.71	$ 3.86	$ 7.51	$ 7.60
Diluted earnings per share	$ 3.68	$ 3.83	$ 7.44	$ 7.52
Weighted-average basic shares outstanding	23,506	23,399	23,463	23,480
Weighted-average diluted shares outstanding	23,676	23,598	23,677	23,722