Stock-based Compensation Plans (Summary of Stock Option Activity) (Details) (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Stock-Based Compensation Plans [Abstract]
Outstanding at beginning of year			103,700	144,834
Options granted	0	0	0	0
Exercised			(9,000)	(22,234)
Outstanding at end of year	94,700	122,600	94,700	122,600
Exercisable at end of year	94,700	122,600	94,700	122,600
Outstanding at beginning of year, Weighted Average Exercise Price Per Share			$ 12.50	$ 12.50
Exercised, Weighted Average Exercise Price Per Share			$ 12.50	$ 12.50
Outstanding at end of year, Weighted Average Exercise Price Per Share	$ 12.50	$ 12.50	$ 12.50	$ 12.50
Exercisable at end of year, Weighted Average Exercise Price Per Share	$ 12.50	$ 12.50	$ 12.50	$ 12.50