Recent Accounting Pronouncements and Supplemental Information - Components of Non-operating income (expense), net (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2022	Dec. 31, 2021
Recent Accounting Pronouncements and Supplemental Information [Abstract]
Gain on Supplemental Employee Retirement Plan Investments	$ 619	$ 680	$ 160	$ 587
Other	51	29	20	(64)
Non-operating income, net	$ 670	$ 709	$ 180	$ 523