Stock-Based Compensation - Summary of Stock Option Activity (Details) (USD $)	9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Stock-Based Compensation [Abstract]
Outstanding at beginning of year (in shares)	87,400	103,700
Exercised (in shares)	(27,965)	(9,000)
Outstanding at end of year (in shares)	59,435	94,700
Exercisable at end of year (in shares)	59,435	94,700
Outstanding at beginning of year, Weighted Average Exercise Price Per Share (in dollars per share)	$ 12.50	$ 12.50
Exercised, Weighted Average Exercise Price Per Share (in dollars per share)	$ 12.50	$ 12.50
Outstanding at end of year, Weighted Average Exercise Price Per Share (in dollars per share)	$ 12.50	$ 12.50
Exercisable at end of year, Weighted Average Exercise Price Per Share (in dollars per share)	$ 12.50	$ 12.50