Stock-Based Compensation (Details) - 2011 Phantom Stock Option and Long-term Incentive Plan [Member] - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Share-based Compensation [Abstract]
Number of shares authorized under the plan (in shares)	16,000,000	16,000,000
Number of options granted to date (in shares)	13,026,099	12,354,004
Stock option activity, shares [Roll Forward]
Number of options outstanding at beginning of year (in shares)	2,535,840	2,959,040
Options granted (in shares)	672,095	807,200
Options forfeited (in shares)	(4,000)	(9,000)
Options paid in cash upon vesting (in shares)	(950,400)	(1,221,400)
Number of options outstanding at period end (in shares)	2,253,535	2,535,840
Stock option related information [Abstract]
Cash paid out on options vested	$ 4,210	$ 4,287
Compensation costs recognized	3,429	4,439
Total liability for long-term incentive plan	$ 5,500	$ 6,300
Minimum [Member]
Share-based Compensation [Abstract]
Strike price of phantom stock options as percent of book value	100.00%