Revenues from Contracts with Customers (Detail Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Change In Accounting Estimate [Line Items]
Income before income taxes	$ 113,098	$ 132,452	$ 229,729	$ 256,896
Diluted earnings per share	$ 3.83	$ 4.18	$ 7.52	$ 7.86
EAC Adjustments
Change In Accounting Estimate [Line Items]
Income before income taxes	$ 5,500	$ 18,100	$ 8,200	$ 25,900
Diluted earnings per share	$ 0.17	$ 0.53	$ 0.26	$ 0.75