Earnings Per Share (Details) (USD $)	3 Months Ended								12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Earnings Per Share [Abstract]
Net income (loss)	$ 9,297,986	$ 5,122,585	$ 5,654,573	$ 4,926,318	$ 5,719,096	$ 5,070,168	$ 1,022,487	$ 2,148,298	$ 25,001,462	$ 13,960,049	$ 7,370,996
Denominator for basic and diluted earnings per share - weighted average shares (including for 2014, 2013 and 2012, unissued, vested directors' shares of 255,039, 232,224 and 229,192, respectively)									16,727,183	16,713,808	16,721,862
Vested directors' shares									255,039	232,224	229,192