Shareholders' Equity Net Income Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Earnings Per Share [Abstract]
Net income	$ 385,762	$ 346,739	$ 257,414
Average Shares Outstanding:
Weighted-average common shares outstanding for basic computation	38,672	38,592	38,471
Dilutive effect of potential common shares	585	628	634
Weighted-average common shares outstanding for dilutive computation	39,257	39,220	39,105
Net income per share — basic	$ 9.98	$ 8.98	$ 6.69
Net income per share — diluted	$ 9.83	$ 8.84	$ 6.58