Shareholders' Equity (Tables)

12 Months Ended

Sep. 30, 2014

Dividends Payable [Line Items]

Schedule of shares issued in connection with dividend reinvestment and stock purchase plan

	2014	2013	2012
Amounts received	$38,090,334	$31,119,351	$13,094,616
Less: Dividend reinvestments	7,624,528	6,781,345	2,425,032
Amounts received, net	$30,465,806	$24,338,006	$10,669,584
Number of Shares Issued	4,296,075	3,243,351	1,503,904

Summary of cash distributions to common shareholders

	2014		2013		2012
Quarter Ended	Amount	Per Share	Amount	Per Share	Amount	Per Share
December 31	$6,815,308	$   0.15	$6,134,523	$   0.15	$5,589,111	$   0.15
March 31	7,030,326	0.15	6,276,824	0.15	6,025,106	0.15
June 30	7,182,521	0.15	6,414,273	0.15	6,035,531	0.15
September 30	8,503,275	0.15	6,590,255	0.15	6,066,850	0.15
	$29,531,430	$    0.60	$25,415,875	$    0.60	$23,716,598	$    0.60

Series A Preferred Stock [Member]

Dividends Payable [Line Items]

Dividend declared and paid on Preferred Stock

Declaration Date	Record Date	Payment Date	Dividend	Dividend per Share
10/1/13	11/15/13	12/16/13	$1,019,725	$0.4765625
1/15/14	2/18/14	3/17/14	1,019,726	0.4765625
4/1/14	5/15/14	6/16/14	1,019,725	0.4765625
7/1/14	8/15/14	9/15/14	1,019,726	0.4765625
			$4,078,902	$1.90625

Declaration Date	Record Date	Payment Date	Dividend	Dividend per Share
10/1/12	11/15/12	12/17/12	$1,019,725	$0.4765625
1/13/13	2/15/13	3/15/13	1,019,726	0.4765625
4/9/13	5/15/13	6/17/13	1,019,725	0.4765625
7/1/13	8/15/13	9/16/13	1,019,726	0.4765625
			$4,078,902	$1.90625

Declaration Date	Record Date	Payment Date	Dividend	Dividend per Share
10/4/11	11/15/11	12/15/11	$1,019,804	$0.4765625
1/18/12	2/15/12	3/15/12	1,019,805	0.4765625
4/18/12	5/15/12	6/15/12	1,019,805	0.4765625
7/9/12	8/15/12	9/17/12	1,019,805	0.4765625
			$4,079,219	$1.90625

Series B Preferred Stock [Member]

Dividends Payable [Line Items]

Dividend declared and paid on Preferred Stock

Declaration Date	Record Date	Payment Date	Dividend	Dividend per Share
10/1/13	11/15/13	12/16/13	$1,132,032	$0.4765625
1/15/14	2/18/14	3/17/14	1,132,033	0.4765625
4/1/14	5/15/14	6/16/14	1,132,032	0.4765625
7/1/14	8/15/14	9/15/14	1,132,033	0.4765625
			$4,528,130	$1.90625

Declaration Date	Record Date	Payment Date	Dividend	Dividend per Share
10/1/12	11/15/12	12/17/12	$1,132,032	$0.4765625
1/13/13	2/15/13	3/15/13	1,132,033	0.4765625
4/9/13	5/15/13	6/17/13	1,132,032	0.4765625
7/1/13	8/15/13	9/16/13	1,132,033	0.4765625
			$4,528,130	$1.90625

Declaration Date	Record Date	Payment Date	Dividend	Dividend per Share
7/9/12	8/15/12	9/17/12	$1,056,563	$0.459375
			$1,056,563	$0.459375