Description of Business and Significant Accounting Policies (Details) (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
Net income available to common stockholders									$ 6,700,000	$ 1,982,000	$ 5,527,000
Weighted average common shares (in shares)									8,608,694	8,592,193	8,510,590
Weighted average common share equivalents (in shares)									2,788	3,409	24,772
Total weighted average common shares and common share equivalents (in shares)									8,611,482	8,595,602	8,535,362
Basic earnings per share (in dollars per share)	$ 0.22	$ 0.16	$ 0.20	$ 0.20	$ (0.26)	$ 0.18	$ 0.23	$ 0.08	$ 0.78	$ 0.23	$ 0.65
Diluted earnings per share (in dollars per share)	$ 0.22	$ 0.16	$ 0.20	$ 0.20	$ (0.26)	$ 0.18	$ 0.23	$ 0.08	$ 0.78	$ 0.23	$ 0.65