Shareholders' Equity (Details Textual) (USD $)	9 Months Ended					9 Months Ended							1 Months Ended	9 Months Ended		1 Months Ended	9 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jan. 26, 2012	Dec. 05, 2011	Sep. 30, 2011	Jun. 30, 2012 Dividend Reinvestment and Stock Purchase Plan [Member]	Jul. 09, 2012 Common Stock [Member]	Jun. 30, 2012 Common Stock [Member]	Jan. 26, 2012 Common Stock [Member]	Jan. 26, 2012 Preferred Stock [Member]	Jun. 30, 2012 Excess Shares [Member]	Jan. 26, 2012 Excess Shares [Member]	Jul. 31, 2012 Series A Cumulative Redeemable Preferred Stock	Jun. 30, 2012 Series A Cumulative Redeemable Preferred Stock	Sep. 30, 2011 Series A Cumulative Redeemable Preferred Stock	Jun. 30, 2012 Series B Cumulative Redeemable Preferred Stock	Jun. 30, 2012 Series B Cumulative Redeemable Preferred Stock	Jul. 09, 2012 Series B Cumulative Redeemable Preferred Stock	Jun. 21, 2012 Series B Cumulative Redeemable Preferred Stock	Jun. 07, 2012 Series B Cumulative Redeemable Preferred Stock	Sep. 30, 2011 Series B Cumulative Redeemable Preferred Stock
Shareholders' Equity and Noncontrolling Interest (Textual)
Number of Authorized shares before amendment			57,139,750						50,000,000	2,139,750		5,000,000
Number of Authorized shares after amendment			77,139,750					67,700,000	70,000,000	2,139,750	5,000,000	5,000,000		2,139,750		2,300,000	2,300,000
Preferred stock, shares issued														2,139,750	2,139,750	2,300,000	2,300,000		300,000	2,000,000	0
Common Stock, shares issued	40,259,495				36,785,037	1,334,718
Common stock issued, value						$ 11,305,344
Reinvestments in common stock						1,230,696
Cash divedends						17,649,748										301,875
Dividend per common share						$ 0.45
Dividend declared per common share by company							$ 0.15											$ 0.459375
Dividend per share of preferred stock													$ 0.4766	$ 1.42968
Preferred dividends paid	3,059,414	3,059,414												3,059,414
Annual rate of dividends cumulative and payable														$ 1.90625			$ 1.96875
Offering price of issued preferred shares																	$ 25.00
Net proceeds from public offering																	55,504,924
Cumulative redeemable preferred, stock dividend rate														7.625%	7.625%	7.875%	7.875%				7.875%
Increase in number of shares authorized			20,000,000
Treasury stock, issued shares	5,000
Number of shares sold in private placement of common stock				2,000,000
Proceeds from issuance of private placement				16,200,000
Noncontrolling interest balance included in other liabilities	$ 13,590