Earnings Per Share - Calculation of Basic and Diluted Earnings per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 95,417	$ 120,344	$ 273,825	$ 320,466
Weighted-average basic shares outstanding	23,409	24,935	23,457	25,026
Dilutive effect of RSUs after application of treasury stock method	207	231	230	281
Weighted-average number of diluted shares outstanding during the period	23,616	25,166	23,687	25,307
Basic earnings per share	$ 4.08	$ 4.83	$ 11.67	$ 12.81
Diluted earnings per share	$ 4.04	$ 4.78	$ 11.56	$ 12.66