Stock-Based Compensation, Phantom Stock Option Plan and Long-term Incentive Plan (Details) - USD ($)	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Stock option activity, shares [Roll Forward]
Options granted (in shares)	0	0
2011 Phantom Stock Option and Long-term Incentive Plan [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Number of shares authorized under the plan (in shares)	1,800,000	900,000
Stock option activity, shares [Roll Forward]
Outstanding at beginning of year (in shares)	665,426	462,464
Options granted (in shares)	235,380	236,308
Options forfeited (in shares)	0	(6,840)
Options paid in cash upon vesting (in shares)	(272,052)	(26,506)
Outstanding at year end (in shares)	628,754	665,426
Cash paid on options vested	$ 845,000	$ 26,900
Allocated share-based compensation expense	830,000	786,800
Total liability for the long-term incentive plan	$ 1,100,000	$ 1,200,000
2011 Phantom Stock Option and Long-term Incentive Plan [Member] | Minimum [Member]
Share-based compensation arrangement by share-based payment award [Line Items]
Strike price of phantom stock options as percent of book value (in hundredths)	100.00%