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	3 Months Ended		9 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Net Income per Share and Weighted Average Shares
Net income	$ 10,042	$ 17,689	$ 21,108	$ 41,688
Net income - basic	10,042	17,689	21,108	41,688
Net income - diluted	$ 10,042	$ 17,689	$ 21,108	$ 41,688
Weighted average number of shares
Weighted average number of shares - basic (in shares)	40,504	40,504	40,504	40,504
Weighted average number of shares - diluted (in shares)	40,504	40,504	40,504	40,504
Net income per share
basic (in dollars per share)	$ 0.25	$ 0.44	$ 0.52	$ 1.03
diluted (in dollars per share)	$ 0.25	$ 0.44	$ 0.52	$ 1.03