Earnings Per Share (Details) (USD $)	3 Months Ended								12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share [Abstract]
Net income (loss)	$ 5,719,096	$ 5,070,168	$ 1,022,487	$ 2,148,298	$ 182,621	$ 3,100,299	$ 675,966	$ 3,412,110	$ 13,960,049	$ 7,370,996	$ 8,493,912
Denominator for basic and diluted earnings per share - weighted average shares (including for 2013, 2012 and 2011, unissued, vested directors' shares of 116,112, 114,596 and 122,728, respectively)									8,356,904	8,360,931	8,393,890
Vested directors' shares									116,112	114,596	122,728