CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Income Statement [Abstract]
Revenues	$ 2,351,002	$ 2,166,982	$ 6,858,722	$ 6,323,680
Costs of revenues:
Direct costs	1,553,169	1,434,735	4,595,374	4,251,384
Indirect costs and selling expenses	510,182	480,917	1,448,623	1,375,524
Depreciation and amortization	58,774	54,961	167,104	139,264
Total costs of revenues	2,122,125	1,970,613	6,211,101	5,766,172
Income from operations	228,877	196,369	647,621	557,508
Interest expense and other, net	52,267	45,117	143,390	113,153
Income before income taxes	176,610	151,252	504,231	444,355
Income taxes	46,217	39,392	125,173	102,380
Net income	$ 130,393	$ 111,860	$ 379,058	$ 341,975
Basic earnings per share (in dollars per share)	$ 5.90	$ 5.02	$ 17.19	$ 15.31
Diluted earnings per share (in dollars per share)	$ 5.88	$ 5.00	$ 17.11	$ 15.21
Weighted average basic shares outstanding (in shares)	22,087	22,279	22,054	22,332
Weighted average diluted shares outstanding (in shares)	22,165	22,383	22,158	22,485