Earnings Per Share - Calculation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net income	$ 384,735	$ 366,794	$ 457,443
Weighted-average number of basic shares outstanding during the period (in shares)	23,196	23,446	24,705
Dilutive effect of RSUs after application of treasury stock method (in shares)	217	231	287
Weighted-average number of diluted shares outstanding during the period (in shares)	23,413	23,677	24,992
Basic earnings per share (in dollars per shares)	$ 16.59	$ 15.64	$ 18.52
Diluted earnings per share (in dollars per shares)	$ 16.43	$ 15.49	$ 18.30