SUBSEQUENT EVENTS (Details) $ / shares in Units, $ in Thousands													1 Months Ended	12 Months Ended
	Jul. 15, 2022 $ / shares	Jun. 15, 2022 $ / shares	May 17, 2022 $ / shares	Mar. 08, 2022 $ / shares	Dec. 09, 2021 $ / shares	Sep. 07, 2021 $ / shares	Jun. 07, 2021 $ / shares	Mar. 05, 2021 $ / shares	Dec. 02, 2020 $ / shares	Sep. 02, 2020 $ / shares	Jun. 03, 2020 $ / shares	Mar. 02, 2020 $ / shares	Feb. 28, 2022 USD ($) ft²	Dec. 31, 2021 $ / shares	Dec. 31, 2020 $ / shares
Subsequent Event [Line Items]
Dividends declared, common (in usd per share)					$ 0.075	$ 0.075	$ 0.075	$ 0.075	$ 0.075	$ 0.075	$ 0.075	$ 0.075
Preferred dividends, per share amount (in usd per share)														$ 1.560	$ 1.560
Series A Preferred Stock
Subsequent Event [Line Items]
Preferred dividends, per share amount (in usd per share)														1.375	1.719
Series A Preferred Stock | Forecast
Subsequent Event [Line Items]
Preferred dividends, per share amount (in usd per share)	$ 0.114583	$ 0.114583	$ 0.114583
Series D Preferred Stock
Subsequent Event [Line Items]
Preferred dividends, per share amount (in usd per share)														$ 1.413	$ 1.648
Series D Preferred Stock | Forecast
Subsequent Event [Line Items]
Preferred dividends, per share amount (in usd per share)	$ 0.117708	$ 0.117708	$ 0.117708
Subsequent event
Subsequent Event [Line Items]
Dividends declared, common (in usd per share)				$ 0.085
Subsequent event | Series A Preferred Stock
Subsequent Event [Line Items]
Preferred stock, dividends per share, declared (in usd per share)				0.34375
Subsequent event | Series D Preferred Stock
Subsequent Event [Line Items]
Preferred stock, dividends per share, declared (in usd per share)				$ 0.353125
Office Property, Los Angeles, California | Subsequent event
Subsequent Event [Line Items]
Asset acquisition, percentage of voting interests acquired													44.00%
Office Property, Los Angeles, California | Subsequent event | Office Building
Subsequent Event [Line Items]
Percentage of ownership acquired													100.00%
Purchase price | $													$ 51,000
Transaction costs | $													$ 51
Square Feet | ft²													97,564
Office Property, Los Angeles, California | Subsequent event | Retail Site
Subsequent Event [Line Items]
Square Feet | ft²													2,760
Land and Building, Los Angeles, California | Subsequent event
Subsequent Event [Line Items]
Percentage of ownership acquired													100.00%
Purchase price | $													$ 2,300
Transaction costs | $													$ 8
Land and Building, Los Angeles, California | Subsequent event | Land
Subsequent Event [Line Items]
Square Feet | ft²													11,318
Land and Building, Los Angeles, California | Subsequent event | Building
Subsequent Event [Line Items]
Area of land | ft²													3,752