Stock-Based Compensation (Details)	6 Months Ended
	Dec. 31, 2015 Plan $ / shares shares	Dec. 31, 2014 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of stock-based compensation plans | Plan	2
Stock Option [Member]
Stock option activity, shares [Roll Forward]
Outstanding at beginning of year (in shares) | shares	47,835	59,435
Exercised (in shares) | shares	(6,600)	(5,100)
Outstanding at period end (in shares) | shares	41,235	54,335
Exercisable at period end (in shares) | shares	41,235	54,335
Stock option activity, weighted average exercise price per share [Abstract]
Outstanding at beginning of year (in dollars per share) | $ / shares	$ 12.50	$ 12.50
Exercised (in dollars per share) | $ / shares	12.50	12.50
Outstanding at period end (in dollars per share) | $ / shares	12.50	12.50
Exercisable at period end (in dollars per share) | $ / shares	$ 12.50	$ 12.50