Stock-Based Compensation (Details) - 2011 Phantom Stock Option and Long-term Incentive Plan [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Jun. 30, 2021
Stock option activity, shares [Roll Forward]
Number of options outstanding, beginning of period (in shares)	1,506,520	1,705,600	1,507,600	1,765,100
Options Granted (in shares)	0	0	475,120	523,700
Options Forfeited (in shares)	0	0	0	0
Options Paid in Cash (in shares)	(27,000)	(198,000)	(503,200)	(781,200)
Number of options outstanding, end of period (in shares)	1,479,520	1,507,600	1,479,520	1,507,600
Stock option related information [Abstract]
Cash paid out on options vested	$ 83	$ 813	$ 3,137	$ 3,920
Compensation costs recognized	1,143	$ 1,105	3,020	$ 2,712
Total liability for the Plan	$ 4,900		$ 4,900		$ 5,000