Revenue Recognition (Detail Textual) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Change In Accounting Estimate [Line Items]
Income before income taxes	$ 142,484	$ 99,589	$ 399,380	$ 278,408
Diluted earnings per share	$ 4.78	$ 3.16	$ 12.66	$ 8.94
EAC Adjustments
Change In Accounting Estimate [Line Items]
Income before income taxes	$ 10,700	$ 8,300	$ 36,600	$ 32,100
Diluted earnings per share	$ 0.31	$ 0.24	$ 1.06	$ 0.93
Revenue from previously satisfied performance obligations	$ 700	$ (300)	$ 2,300	$ 9,900