SHAREHOLDERS’ EQUITY (Details Narrative)												1 Months Ended	12 Months Ended				153 Months Ended
	Oct. 02, 2019 $ / shares	Jan. 16, 2019 USD ($)	Aug. 02, 2018 USD ($)	Oct. 02, 2017 yr $ / shares	Jun. 29, 2017 USD ($) $ / shares	Jun. 07, 2017 USD ($) $ / shares	Mar. 09, 2017 USD ($) $ / shares shares	Oct. 14, 2016 USD ($) $ / shares shares	Sep. 15, 2016 USD ($)	Sep. 13, 2016 USD ($) $ / shares shares	Oct. 02, 2015 $ / shares	Oct. 31, 2018 USD ($) $ / shares shares	Sep. 30, 2019 USD ($) $ / shares shares	Sep. 30, 2018 USD ($) $ / shares shares	Sep. 30, 2017 USD ($) $ / shares	Sep. 30, 2016 $ / shares	Sep. 30, 2019 USD ($) $ / shares shares	Nov. 25, 2019	May 05, 2017 $ / shares shares	Sep. 14, 2016 $ / shares shares
Accumulated Other Comprehensive Income (Loss) [Line Items]
Percentage of discount price from market price through drip program													95.00%
Number of common shares sold | shares												9,200,000
Sale of stock price per share												$ 15.00
Increase in common stock dividend												11.30%
Proceeds from issuance initial public offering | $												$ 132,300,000	$ 132,338,000	$ 0	$ 0
Cash dividends paid | $													$ (63,742,000)	$ (53,586,000)
Increase in ATM Program | $			$ 96,500,000
Annual rate of dividends cumulative and payable													$ 1.53125	$ 1.53125
Maximum dollar value that may be purchased under the share repurchase program | $													$ 50,000,000.0				$ 50,000,000.0
Preferred Stock ATM Program [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of common shares sold | shares																	5,500,000
Sale of stock price per share													$ 24.81				$ 24.81
Proceeds from preferred stock atm program | $																	$ 134,000,000.0
Sale of stock price per share													$ 24.49				$ 24.49
Preferred Stock ATM Program [Member] | Fiscal Year 2019 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of common shares sold | shares													2,400,000
Proceeds from ATM Program | $													$ 58,200,000
Preferred Stock ATM Program [Member] | Fiscal Year 2018 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Sale of stock price per share													$ 24.49				$ 24.49
Preferred Stock ATM Program One [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Remaining amount that may be sold, value | $													$ 59,800,000
Series A Cumulative Redeemable Preferred Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Preferred stock, shares issued | shares																				2,100,000
Preferred stock, shares outstanding | shares																				2,100,000
Cumulative redeemable preferred, stock dividend rate								7.625%								7.625%				7.625%
Preferred stock, par value																				$ 0.01
Preferred stock redemption price								$ 25.00								$ 25.00
Preferred stock accrued dividend per share								$ 0.23299								$ 1.90625
Dividend rate on preferred stock series A preferred stock																7.625%
Series B Cumulative Redeemable Preferred Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Preferred stock, shares issued | shares																			2,300,000
Preferred stock, shares outstanding | shares																			2,300,000
Cumulative redeemable preferred, stock dividend rate						7.875%										7.875%			7.875%
Preferred stock, par value																			$ 0.01
Preferred stock redemption price						$ 25.00										$ 25.00
Preferred stock accrued dividend per share						$ 0.0328125										$ 1.96875
Dividend rate on preferred stock series A preferred stock																7.875%
Accrued dividend | $						$ 57,500,000
Net accrued dividend paid at redemption | $						$ 75,000
Dividend per preferred stock						$ 25.0328125
Cash dividends paid | $						$ 57,600,000
Preferred shares redemption charges | $															$ 2,500,000
Series C Cumulative Redeemable Preferred Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Preferred stock, shares issued | shares							3,000,000.0	2,100,000		5,400,000
Preferred stock, shares outstanding | shares								2,100,000
Cumulative redeemable preferred, stock dividend rate					6.125%		6.125%			6.125%
Preferred stock, par value					$ 0.01					$ 0.01
Dividend rate on preferred stock series A preferred stock							7.875%	7.625%
Net accrued dividend paid at redemption | $								$ 499,000
Offering price per share							$ 24.50			$ 25.00
Proceeds from underwritten public offering | $										$ 130,500,000
Proceeds from offering used to pay down line of credit | $									$ 45,000,000.0
Net proceeds from public offering used to redeem series A preferred stock | $								$ 53,500,000
Liquidation price per share					$ 25.00		$ 25.00
Gross proceeds from offering | $							$ 73,500,000
Net proceeds from offering | $							$ 71,000,000.0
Available for sale through ATM program | $					$ 100,000,000.0
Series C Cumulative Redeemable Preferred Stock [Member] | Onand After September 15, 2021 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative redeemable preferred, stock dividend rate													6.125%				6.125%
Preferred stock redemption price													$ 25.00				$ 25.00
Series C Preferred Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Preferred stock, shares issued | shares													13,907,000	11,488,000			13,907,000
Preferred stock, shares outstanding | shares													13,907,000	11,488,000			13,907,000
Cumulative redeemable preferred, stock dividend rate			6.125%										6.125%	6.125%			6.125%
Preferred stock, par value													$ 0.01	$ 0.01			$ 0.01
Increase in ATM Program | $			$ 125,000,000.0
Annual rate of dividends cumulative and payable													$ 1.53125		$ 1.4802083
Description of redemption of preferred stock outstanding													within 90 days after the Delisting Event, for a cash redemption price per share of 6.125% Series C Preferred Stock equal to $25.00 plus any accumulated and unpaid dividends thereon (whether or not declared), to, but not including, the redemption date.
Description of redemption of preferred stock outstanding upon the occurrence of change of control													within 120 days after the first date on which such Change of Control occurred, for a cash redemption price per share of 6.125% Series C Preferred Stock equal to $25.00 plus any accumulated and unpaid dividends thereon (whether or not declared) to, but not including, the redemption date.
Series C Preferred Stock [Member] | Preferred Stock ATM Program [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative redeemable preferred, stock dividend rate			6.125%
Series C Preferred Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Preferred stock, shares issued | shares													13,900,000				13,900,000
Preferred stock, shares outstanding | shares													13,900,000				13,900,000
Subsequent Event [Member] | Series C Preferred Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Cumulative redeemable preferred, stock dividend rate																		6.125%
Common Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Annualized dividend rate per share price				$ 0.68
Dividend increase percentage				13.00%
Period of maintained or increased its cash dividend | yr				28
Cash dividends paid | $													$ 0	$ 0
Maximum [Member] | Common Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Dividend declared per share				$ 0.17
Minimum [Member] | Common Stock [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Dividend declared per share				$ 0.16
Board of Directors [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Percentage increase in common stock dividend.				6.30%							6.70%
Annualized dividend rate per share price											$ 0.64
Board of Directors [Member] | Subsequent Event [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Dividend declared per share	$ 0.3828125
Board of Directors [Member] | Maximum [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Dividend declared per share											0.16
Board of Directors [Member] | Minimum [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Dividend declared per share											$ 0.15
Shareholders [Member] | Subsequent Event [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Dividend declared per share	0.17
Annualized dividend rate per share price	$ 0.68
Dividends payable, date to be paid	Dec. 16, 2019
Record date	Nov. 15, 2019
Underwriters [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Number of common shares purchased | shares												1,200,000
Board of Directors Chairman [Member] | Common Stock Repurchase Program [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Increase in the value of common stock available under program | $		$ 40,000,000.0
Maximum dollar value that may be purchased under the share repurchase program | $		$ 50,000,000.0