Revenues and Contract Balances - Narrative (Details) - USD ($)	3 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Change In Accounting Estimate [Line Items]
Income before income taxes	$ 111,778,000	$ 116,610,000
Diluted earnings per share (in dollars per shares)	$ 3.76	$ 3.76
EAC Adjustments
Change In Accounting Estimate [Line Items]
Income before income taxes	$ 2,400,000	$ 5,700,000
Diluted earnings per share (in dollars per shares)	$ 0.08	$ 0.18
Revenue from previously satisfied performance obligations	$ 0	$ 0