Nature of Business and Summary of Significant Accounting Policies - Net Income per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Nature of Business and Summary of Significant Accounting Policies
Basic EPS	$ 13,196	$ 9,549	$ 36,284	$ 16,562
Diluted EPS	$ 13,196	$ 9,549	$ 36,284	$ 16,562
Weighted average
Weighted Average Shares, Basic EPS	36,835,000	36,793,000	36,792,000	36,736,000
Weighted Average Shares, Stock Options	283,000	289,000	240,000	247,000
Weighted Average Shares, Diluted EPS	37,118,000	37,082,000	37,032,000	36,983,000
Effect of Dilutive Securities:
Basic (in dollars per share)	$ 0.36	$ 0.26	$ 0.99	$ 0.45
Stock Options (in dollars per share)			(0.01)
Diluted (in dollars per share)	$ 0.36	$ 0.26	$ 0.98	$ 0.45
Excluded from diluted EPS	0	0	24,167	8,379