Revenues and Contract Balances - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Change In Accounting Estimate [Line Items]
Income before income taxes	$ 131,464	$ 116,272	$ 358,999	$ 346,001
Diluted earnings per share (dollars per share)	$ 4.33	$ 4.04	$ 11.76	$ 11.56
EAC Adjustments
Change In Accounting Estimate [Line Items]
Income before income taxes	$ 5,300	$ 13,000	$ 16,800	$ 21,200
Diluted earnings per share (dollars per share)	$ 0.17	$ 0.40	$ 0.53	$ 0.66