Summary of Significant Accounting Policies and New Accounting Standards - Net Income per Share and Weighted Average Shares (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Net Income per Share and Weighted Average Shares
Net income	$ 49,175	$ 54,385	$ 33,552
Net income - basic	49,175	54,385	33,552
Net income - diluted	$ 49,175	$ 54,385	$ 33,552
Weighted average number of shares
Weighted average number of shares - basic (in shares)	40,504	40,473	40,454
Dilutive effect of stock options and restricted stock units (in shares)		31	50
Weighted average number of shares - diluted (in shares)	40,504	40,504	40,504
Net income per share
basic (in dollars per share)	$ 1.21	$ 1.34	$ 0.83
diluted (in dollars per share)	$ 1.21	$ 1.34	$ 0.83