Stockholders' Equity (Details Textual) (USD $)	3 Months Ended								12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011	Dec. 18, 2012	Dec. 20, 2011
Common stock, shares authorized	20,000,000				20,000,000				20,000,000	20,000,000
Stock Repurchased During Period, Shares										93,954	98,629
Stock Repurchased During Period Weighted Average Price Per Share										$ 10.28	$ 8.90
Percentage Of Shares Repurchased Since Inception	2.34%								2.34%
Dividends Payable, Amount Per Share												$ 0.50	$ 1.00
Aggregate Amount Of Dividend Paid												$ 4,312,000	$ 8,576,000
Common Stock, Shares, Outstanding	8,626,028								8,626,028
Common Stock, Dividends, Per Share, Declared	$ 0.07	$ 0.07	$ 0.57	$ 0.07	$ 0.05	$ 0.05	$ 1.00	$ 0	$ 0.78	$ 1.10
Stock Repurchase Program, Authorized Amount									$ 10,000,000