SHAREHOLDERS’ EQUITY (Details Narrative) - USD ($) $ / shares in Units, $ in Thousands | Oct. 20, 2020 | Oct. 01, 2020 | Oct. 01, 2020 | Sep. 30, 2020 | Sep. 15, 2020 | Sep. 11, 2020 | Jul. 22, 2020 | Mar. 13, 2020 | Jan. 15, 2020 | Oct. 21, 2019 | Oct. 30, 2020 | Jun. 30, 2020 | Sep. 30, 2020 | Oct. 01, 2020 | Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2020 | Sep. 30, 2020 | Sep. 30, 2019 | Jul. 15, 2020 | May 14, 2020 | Dec. 31, 2019 |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Proceed from dividend reinvestment and stock purchase plan (DRIP) | | | | | | | | | | | | | | | | | | | | | | | $ 2,300 | $ 5,600 | | | |
New shares issued under drip, value | | | | | | | | | | | | | | | $ 2,208 | $ 1,743 | $ 1,601 | $ 7,821 | $ 10,724 | $ 10,671 | | | | | | | |
Stock Repurchased During Period, Value | | | | | | | | | | | | | | | | $ 225 | $ 1,604 | 237 | | | | | | | | | |
Common stock, par value | | | | $ 0.10 | | | | | | | | | $ 0.10 | | $ 0.10 | | | | | | | | $ 0.10 | | | $ 0.10 | $ 0.10 |
Common stock, shares authorized | | | | 140,364,000 | | | | | | | | | 140,364,000 | | 140,364,000 | | | | | | | | 140,364,000 | | 140,400,000 | 20,000,000 | 123,664,000 |
Proceeds from issuance of offering | | | | | | | | | | | | | | | | | | | | | | | $ 71,473 | $ 0 | | | |
Excess stock, shares authorized | | | | 3,000,000 | | | | | | | | | 3,000,000 | | 3,000,000 | | | | | | | | 3,000,000 | | 3 | | 3,000,000 |
Preferred stock, par value | | | | | | | | | | | | | | | | | | | | | | | | | $ 0.10 | | |
A T M Program [Member] | B Riley F B R Inc [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Gross proceeds from issuance of stock | | | | | | | | | | | | | $ 8,600 | | | | | | | | | | | | | | |
Proceeds from issuance of offering | | | | | | | | | | | | | $ 8,300 | | | | | | | | | | | | | | |
Equity Distribution Agreement [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Sale of Stock, Consideration Received on Transaction | | | | | | | | | | | | $ 100,000 | | | | | | | | | | | | | | | |
Preferred Stock At The Market Sales Program [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Number shares issued and sold | | | | | | | | | | | | | | | | | | | | | 2,600,000 | | | | | | |
Gross proceeds from issuance of stock | | | | | | | | | | | | | | | | | | | | | $ 64,100 | | | | | | |
Proceeds from issuance of offering | | | | | | | | | | | | | | | | | | | | | $ 63,100 | | | | | | |
Shares Issued, Price Per Share | | | | | | | | | | | | $ 25.06 | | | | $ 25.06 | | | | | $ 25.06 | $ 25.06 | | | | | |
Preferred Stock At The Market Sales Program [Member] | Maximum [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Sale of Stock, Consideration Received on Transaction | | | | | | | | | | $ 100,000 | | | | | | | | | | | | | | | | | |
New Preferred Stock At The Market Sales Program [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Sale of Stock, Consideration Received on Transaction | | | | | | | $ 100,000 | | | | | | | | | | | | | | | | | | | | |
Common Stock [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Proceed from dividend reinvestment and stock purchase plan (DRIP) | | | | | | | | | | | | | | | | | | | | | | | $ 2,300 | | | | |
New shares issued under drip, value | | | | | | | | | | | | | | | | | | | | | | | $ 5,600 | | | | |
New shares issued under drip | | | | | | | | | | | | | | | | | | | | | | | 468,000 | | | | |
Stock Repurchased During Period, Shares | | | | | | | | | | | | | | | | | | | | | | | 174,000 | | | | |
Stock Repurchased During Period, Value | | | | | | | | | | | | | | | | | | | | | | | $ 1,800 | | | | |
Share Price | | | | $ 10.50 | | | | | | | | | $ 10.50 | | $ 10.50 | | | | | | | | $ 10.50 | | | | |
Common Stock [Member] | Common Stock Repurchase Program [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Purchase of common stock authorized | | | | | | | | | $ 25,000 | | | | | | | | | | | | | | | | | | |
8.0% Series B Cumulative Redeemable Preferred Stock [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Dividend declared per share, paid | | | | | | $ 0.2722 | | | | | | | | | | | | | | | | | | | | | |
Preferred Stock, Liquidation Preference Per Share | | | | | | 25 | | | | | | | | | | | | | | | | | | | | | |
Preferred Stock, Redemption Price Per Share | | | | | | $ 25.2722 | | | | | | | | | | | | | | | | | | | | | |
Preferred Stock, Redemption Amount | | | | $ 2,900 | | | | | | | | | $ 2,900 | | $ 2,900 | | | | | | | | $ 2,900 | | | | |
8.0% Series B Cumulative Redeemable Preferred Stock [Member] | Series B Preferred Stock Repurchase Program [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Stock Repurchased During Period, Shares | | | | | | | | | | | | | | | | | 531 | | | | | | | | | | |
Stock Repurchased During Period, Value | | | | | | | | | | | | | | | | | $ 12,000 | | | | | | | | | | |
Purchase of preferred stock authorized value | | | | | | | | $ 5,000 | | | | | | | | | | | | | | | | | | | |
Series B Preferred Stock [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Excess Stock, Value | | | | | | 3.8 | | | | | | | | | | | | | | | | | | | | | |
Number of stock eligible for sale | | | | | | | | | | | | | | | | | | | | | | | | | | | 4,000,000 |
Preferred stock, par value | | | | | | | | | | | | | | | | | | | | | | | | | | | $ 0.10 |
6.75% Series C Cumulative Redeemable Preferred Stock [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Dividends paid | | | | | $ 4,100 | | | | | | | | | | | | | | | | | | | | | | |
Dividend declared per share, paid | | | | | $ 0.421875 | | | | | | | | | | | | | | | | | | | | | | |
Record date of dividend | | | | | Aug. 17, 2020 | | | | | | | | | | | | | | | | | | | | | | |
Annual rate on dividend per share payable quarterly | | | | | $ 1.6875 | | | | | | | | | | | | | | | | | | | | | | |
Dividend payable date to be paid day month and year description | | | | | June 1, 2020 through August 31, 2020 | | | | | | | | | | | | | | | | | | | | | | |
Preferred Stock, Dividend Rate, Percentage | | | | | 6.75% | | | | | | | | | | | | | | | | | | | | | | |
Preferred Stock, Liquidation Preference Per Share | | | | | $ 25 | | | | | | | | | | | | | | | | | | | | | | |
Series D Preferred Stock [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Dividends paid | | | | | $ 2,100 | | | | | | | | | | | | | | | | | | $ 6,200 | | | | |
Dividend declared per share, paid | | | | | $ 0.3984375 | | | | | | | | | | | | | | | | | | | | | | |
Record date of dividend | | | | | Aug. 17, 2020 | | | | | | | | | | | | | | | | | | | | | | |
Annual rate on dividend per share payable quarterly | | | | | $ 1.59375 | | | | | | | | | | | | | | | | | | | | | | |
Dividend payable date to be paid day month and year description | | | | | June 1, 2020 through August 31, 2020 | | | | | | | | | | | | | | | | | | | | | | |
Preferred Stock, Dividend Rate, Percentage | | | | | 6.375% | | | | | | | | | | | | | | | | | | | | | | |
Preferred Stock, Liquidation Preference Per Share | | | | | $ 25 | | | | | | | | | | | | | | | | | | | | | | |
Number of stock eligible for sale | | | | 9,300,000 | | | | | | | | | 9,300,000 | | 9,300,000 | | | | | | | | 9,300,000 | | | | 6,000,000 |
Preferred stock, par value | | | | $ 0.10 | | | | | | | | | $ 0.10 | | $ 0.10 | | | | | | | | $ 0.10 | | | | $ 0.10 |
Subsequent Event [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Preferred Stock, Redemption Price Per Share | $ 0.2722 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Subsequent Event [Member] | Series B Preferred Stock [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Preferred Stock, Dividend Rate, Percentage | 8.00% | | | | | | | | | | | | | | | | | | | | | | | | | | |
Preferred Stock, Redemption Price Per Share | $ 25 | | | | | | | | | | | | | | | | | | | | | | | | | | |
Subsequent Event [Member] | 6.75% Series C Cumulative Redeemable Preferred Stock [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Record date of dividend | | Nov. 16, 2020 | | | | | | | | | | | | | | | | | | | | | | | | | |
Annual rate on dividend per share payable quarterly | | $ 0.421875 | $ 0.421875 | | | | | | | | | | | $ 0.421875 | | | | | | | | | | | | | |
Dividend paid date | | Dec. 15, 2020 | | | | | | | | | | | | | | | | | | | | | | | | | |
Dividend payable date to be paid day month and year description | | September 1, 2020 through November 30, 2020 | | | | | | | | | | | | | | | | | | | | | | | | | |
Subsequent Event [Member] | Series D Preferred Stock [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Number shares issued and sold | | | | | | | | | | | 583,000 | | | | | | | | | | | | | | | | |
Gross proceeds from issuance of stock | | | | | | | | | | | $ 14,400 | | | | | | | | | | | | | | | | |
Proceeds from issuance of offering | | | | | | | | | | | $ 14,200 | | | | | | | | | | | | | | | | |
Shares Issued, Price Per Share | | | | | | | | | | | $ 24.78 | | | | | | | | | | | | | | | | |
Subsequent Event [Member] | Six Point Three Hundred And Seventy Five Percentage Series Dumulative Redeemable Preferred Stock [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Record date of dividend | | | Nov. 16, 2020 | | | | | | | | | | | | | | | | | | | | | | | | |
Annual rate on dividend per share payable quarterly | | $ 0.3984375 | $ 0.3984375 | | | | | | | | | | | 0.3984375 | | | | | | | | | | | | | |
Dividend paid date | | | Dec. 15, 2020 | | | | | | | | | | | | | | | | | | | | | | | | |
Dividend payable date to be paid day month and year description | | | September 1, 2020 through November 30, 2020 | | | | | | | | | | | | | | | | | | | | | | | | |
Common Shareholders [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Dividends paid | | | | | | | | | | | | | | | | | | | | | | | $ 22,300 | | | | |
Proceed from dividend reinvestment and stock purchase plan (DRIP) | | | | | | | | | | | | | | | | | | | | | | | $ 2,300 | | | | |
Common Stock [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Dividends paid | | | | | $ 7,500 | | | | | | | | | | | | | | | | | | | | | | |
Dividend declared per share, paid | | | | | $ 0.18 | | | | | | | | | | | | | | | | | | | | | | |
Record date of dividend | | | | | Aug. 15, 2020 | | | | | | | | | | | | | | | | | | | | | | |
Proceed from dividend reinvestment and stock purchase plan (DRIP) | | | | | $ 654,000 | | | | | | | | | | | | | | | | | | | | | | |
New shares issued under drip, value | | | | | | | | | | | | | | | $ 18 | $ 15 | $ 13 | $ 65 | $ 83 | $ 84 | | | | | | | |
New shares issued under drip | | | | | | | | | | | | | | | 178,000 | 157,000 | 133,000 | 645,000 | 834,000 | 837,000 | | | | | | | |
Stock Repurchased During Period, Shares | | | | | | | | | | | | | | | | (22,000) | (152,000) | (20,000) | | | | | | | | | |
Stock Repurchased During Period, Value | | | | | | | | | | | | | | | | $ 2 | $ 15 | $ 2 | | | | | | | | | |
Common Stock [Member] | A T M Program [Member] | B Riley F B R Inc [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Number shares issued and sold | | | | 117,000 | | | | | | | | | | | | | | | | | | | | | | | |
Sale of stock price per share | | | | $ 14.54 | | | | | | | | | $ 14.54 | | $ 14.54 | | | | | | | | $ 14.54 | | | | |
Gross proceeds from issuance of stock | | | | $ 1,700 | | | | | | | | | | | | | | | | | | | | | | | |
Proceeds from issuance of offering | | | | $ 1,500 | | | | | | | | | | | | | | | | | | | | | | | |
Common Stock [Member] | Subsequent Event [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Record date of dividend | | | Dec. 15, 2020 | | | | | | | | | | | | | | | | | | | | | | | | |
Annual rate on dividend per share payable quarterly | | $ 0.18 | $ 0.18 | | | | | | | | | | | $ 0.18 | | | | | | | | | | | | | |
Dividend paid date | | | | | | | | | | | | | | Nov. 16, 2020 | | | | | | | | | | | | | |
8.0% Series B Cumulative Redeemable Preferred Stock [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Dividends paid | | | | | $ 1,900 | | | | | | | | | | | | | | | | | | | | | | |
Dividend declared per share, paid | | | | | $ 0.50 | | | | | | | | | | | | | | | | | | | | | | |
Record date of dividend | | | | | Aug. 17, 2020 | | | | | | | | | | | | | | | | | | | | | | |
Annual rate on dividend per share payable quarterly | | | | | $ 2 | | | | | | | | | | | | | | | | | | | | | | |
Dividend payable date to be paid day month and year description | | | | | June 1, 2020 through August 31, 2020 | | | | | | | | | | | | | | | | | | | | | | |
Preferred Stock, Dividend Rate, Percentage | | | | | 8.00% | | | | | | | | | | | | | | | | | | | | | | |
Preferred Stock, Liquidation Preference Per Share | | | | | $ 25 | | | | | | | | | | | | | | | | | | | | | | |
Series B Preferred Share [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Dividends paid | | | | | | | | | | | | | | | | | | | | | | | $ 5,700 | | | | |
New shares issued under drip, value | | | | | | | | | | | | | | | $ 0 | 0 | 0 | 0 | $ 0 | $ 0 | | | | | | | |
Stock Repurchased During Period, Value | | | | | | | | | | | | | | | | 0 | 0 | 0 | | | | | | | | | |
Number of stock eligible for sale | | | | | | | | | | | | | | | | | | | | | | | | | 4,000,000 | | |
Series C Preferred Share [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Dividends paid | | | | | | | | | | | | | | | | | | | | | | | $ 12,400 | | | | |
New shares issued under drip, value | | | | | | | | | | | | | | | $ 0 | 0 | 0 | 0 | 0 | 0 | | | | | | | |
Stock Repurchased During Period, Value | | | | | | | | | | | | | | | | 0 | 0 | 0 | | | | | | | | | |
Number of stock eligible for sale | | | | | | | | | | | | | | | | | | | | | | | | | 13,800,000 | | |
Series C Preferred Share [Member] | A T M Program [Member] | B Riley F B R Inc [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Number shares issued and sold | | | | | | | | | | | | | 134,000 | | | | | | | | | | | | | | |
Sale of stock price per share | | | | $ 24.96 | | | | | | | | | $ 24.96 | | $ 24.96 | | | | | | | | $ 24.96 | | | | |
Series D Preferred Share [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
New shares issued under drip, value | | | | | | | | | | | | | | | $ 0 | 0 | 0 | 0 | $ 0 | $ 0 | | | | | | | |
Stock Repurchased During Period, Value | | | | | | | | | | | | | | | | $ 0 | $ 0 | $ 0 | | | | | | | | | |
Common stock, shares authorized | | | | | | | | | | | | | | | | | | | | | | | | | 3,300,000 | | |
Number of stock eligible for sale | | | | | | | | | | | | | | | | | | | | | | | | | 9,300,000 | | |
Series D Preferred Share [Member] | A T M Program [Member] | B Riley F B R Inc [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Number shares issued and sold | | | | | | | | | | | | | 213,000 | | | | | | | | | | | | | | |
Sale of stock price per share | | | | $ 24.78 | | | | | | | | | $ 24.78 | | $ 24.78 | | | | | | | | $ 24.78 | | | | |
Series D Preferred Share [Member] | Preferred Stock At The Market Sales Program [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Number shares issued and sold | | | | | | | | | | | | | | | | | | | | | | 3,200,000 | | | | | |
Gross proceeds from issuance of stock | | | | | | | | | | | | | | | | | | | | | | $ 80,500 | | | | | |
Proceeds from issuance of offering | | | | | | | | | | | | | | | | | | | | | | $ 79,100 | | | | | |
Shares Issued, Price Per Share | | | | | | | | | | | | $ 25.09 | | | | $ 25.09 | | | | | $ 25.09 | $ 25.09 | | | | | |
Series C Preferred Stock Or Series D Preferred Stock [Member] | Preferred Stock At The Market Sales Program [Member] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Accumulated Other Comprehensive Income (Loss) [Line Items] | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Preferred Stock, Shares Subscribed but Unissued, Subscriptions Receivable | | | | $ 91,400 | | | | | | | | | $ 91,400 | | $ 91,400 | | | | | | | | $ 91,400 | | | | |