Earnings Per Share - Calculation of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Earnings Per Share [Abstract]
Net income	$ 87,101	$ 90,299	$ 176,226	$ 178,408
Weighted-average basic shares outstanding	23,506	23,399	23,463	23,480
Dilutive effect of RSUs after application of treasury stock method	170	199	214	242
Weighted-average number of diluted shares outstanding during the period	23,676	23,598	23,677	23,722
Basic earnings per share	$ 3.71	$ 3.86	$ 7.51	$ 7.60
Diluted earnings per share	$ 3.68	$ 3.83	$ 7.44	$ 7.52