Stock-based Compensation Plans (Summary of Stock Option Activity) (Details) (USD $)	6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Stock-Based Compensation Plans [Abstract]
Outstanding at beginning of year	103,700	144,834
Exercised	(3,000)	(4,400)
Outstanding at end of year	100,700	140,434
Exercisable at end of year	100,700	140,434
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
Exercisable at end of year, Weighted Average Exercise Price Per Share	$ 12.50	$ 12.50