Financial Statement Presentation - Correction of Immaterial Error (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Financial Statement Presentation
Net income (loss) for earnings per share calculation	$ 13,704	$ 5,592	$ 34,536	$ 17,397
Weighted average number of common shares outstanding - Basic (in shares)	33,013	33,009	33,108	32,933
Weighted average number of common shares and dilutive potential common shares used in diluted earnings per share (in shares)	33,156	33,388	33,291	33,258
Net earnings (loss) per common share - Basic (in dollars per share)	$ 0.42	$ 0.17	$ 1.04	$ 0.53
Net earnings (loss) per common share - Diluted (in dollars per share)	$ 0.41	$ 0.17	$ 1.04	$ 0.52