Stock-Based Compensation (Details) - 2011 Phantom Stock Option and Long-term Incentive Plan [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2021
Stock option activity, shares [Roll Forward]
Number of options outstanding, beginning of period (in shares)	1,982,720	2,288,800	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)	(476,200)	(583,200)	(476,200)	(583,200)
Number of options outstanding, end of period (in shares)	1,506,520	1,705,600	1,506,520	1,705,600
Stock option related information [Abstract]
Cash paid out on options vested	$ 3,054	$ 3,107	$ 3,054	$ 3,107
Compensation costs recognized	1,067	$ 972	1,877	$ 1,607
Total liability for the Plan	$ 3,800		$ 3,800		$ 5,000