Earnings Per Share - Computation (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022
Earnings Per Share [Abstract]
Net income	$ 83,870	$ 87,101	$ 169,917	$ 176,226
Weighted-average number of basic shares outstanding during the period (in shares)	22,282	23,506	22,464	23,463
Dilutive effect of RSUs after application of treasury stock method (in shares)	125	170	186	214
Weighted-average number of diluted shares outstanding during the period (in shares)	22,407	23,676	22,650	23,677
Basic earnings per share (in dollars per shares)	$ 3.76	$ 3.71	$ 7.56	$ 7.51
Diluted earnings per share (in dollars per shares)	$ 3.74	$ 3.68	$ 7.50	$ 7.44