CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Income Statement [Abstract]
Revenues	$ 2,099,809	$ 1,833,934	$ 4,156,698	$ 3,684,081
Costs of revenues:
Direct costs	1,402,225	1,255,251	2,816,649	2,528,169
Indirect costs and selling expenses	466,661	409,355	894,607	813,988
Depreciation and amortization	49,625	36,023	84,303	71,270
Total costs of revenues	1,918,511	1,700,629	3,795,559	3,413,427
Income from operations	181,298	133,305	361,139	270,654
Interest expense and other, net	44,066	27,519	68,036	53,090
Income before income taxes	137,232	105,786	293,103	217,564
Income taxes	27,294	21,916	62,988	47,647
Net income	$ 109,938	$ 83,870	$ 230,115	$ 169,917
Basic earnings per share (in dollars per share)	$ 4.90	$ 3.76	$ 10.29	$ 7.56
Diluted earnings per share (in dollars per share)	$ 4.88	$ 3.74	$ 10.21	$ 7.50
Weighted-average basic shares outstanding (in shares)	22,414	22,282	22,359	22,464
Weighted-average diluted shares outstanding (in shares)	22,534	22,407	22,537	22,650