Stock-Based Compensation (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018 USD ($) Plan $ / shares shares	Mar. 31, 2017 USD ($) $ / shares shares	Mar. 31, 2018 USD ($) Plan $ / shares shares	Mar. 31, 2017 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock-based compensation plans | Plan	2		2
2008 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Remaining compensation cost to be recognized | $	$ 0	$ 0	$ 0	$ 0
2008 Stock Option Plan [Member] | Stock Option [Member]
Stock option activity, shares [Roll Forward]
Outstanding at beginning of year (in shares)			37,770	64,770
Exercised (in shares)			(24,000)	(27,000)
Outstanding at period end (in shares)	13,770	37,770	13,770	37,770
Exercisable at period end (in shares)	13,770	37,770	13,770	37,770
Stock option activity, weighted average exercise price per share [Abstract]
Outstanding at beginning of year (in dollars per share) | $ / shares			$ 6.25	$ 6.25
Exercised (in dollars per share) | $ / shares			6.25	6.25
Outstanding at period end (in dollars per share) | $ / shares	$ 6.25	$ 6.25	6.25	6.25
Exercisable at period end (in dollars per share) | $ / shares	$ 6.25	$ 6.25	$ 6.25	$ 6.25
Options outstanding, intrinsic value | $	$ 419	$ 646	$ 419	$ 646
Options exercisable, intrinsic value | $	419	646	419	646
Options exercised during period, total intrinsic value | $	$ 563	$ 0	$ 666	$ 339
Options granted (in shares)	0	0	0	0