INVESTMENT IN UNCONSOLIDATED JOINT VENTURES - Battery Point Series A-3 Preferred Units (Details) - USD ($) $ / shares in Units, $ in Thousands		6 Months Ended		12 Months Ended
	Mar. 20, 2019	Jun. 30, 2020	Jun. 30, 2019	Dec. 31, 2019	Jul. 01, 2020	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities		$ 78,478		$ 78,276
Number of shares owned (in shares)		69,784,521		67,354,922
Series A-3 Preferred Units | Battery Point Holdings
Schedule of Equity Method Investments [Line Items]
Obligation to use percent of net proceeds for future equity capital raising	20.00%
Battery Point Series A-3 Preferred Units
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities		$ 13,991		$ 13,991
Battery Point Series A-3 Preferred Units | Series A-3 Preferred Units
Schedule of Equity Method Investments [Line Items]
Investments in unconsolidated entities		$ 14,000
Number of shares owned (in shares)		640,000
Point Trust LLC
Schedule of Equity Method Investments [Line Items]
Investment acquired (in shares)	210,000
Investment acquired (in dollars per shares)	$ 25
Number of shares purchased (in shares)				430,000
Stock repurchased during period				$ 10,800
Point Trust LLC | Series B Preferred Units
Schedule of Equity Method Investments [Line Items]
Redemptions of common stock (in shares)	13,000
Redemptions of common stock (in dollars per shares)	$ 1,000
Aggregate principal balance	$ 13,000
Investments						$ 4,500
Point Trust LLC | Series A-3 Preferred Units
Schedule of Equity Method Investments [Line Items]
Principal paydown	7,700
Investment acquired (in shares)		640,000
Investments	$ 5,300
Dividends, annual rate	7.50%
Number of shares purchased (in shares)				430,000
Stock repurchased during period				$ 10,800
Investments in unconsolidated entities		$ 14,000
Distributions		$ 700	$ 100
Point Trust LLC | Series A-3 Preferred Units | Subsequent Event
Schedule of Equity Method Investments [Line Items]
Shares eliminated in consolidation due to acquisition					640,000
Point Trust LLC | Series A-3 Preferred Units | Not Redeemed by February 28, 2020
Schedule of Equity Method Investments [Line Items]
Dividends, annual rate	10.00%
Point Trust LLC | Series A-3 Preferred Units | Not Redeemed by February 28, 2021
Schedule of Equity Method Investments [Line Items]
Dividends, annual rate	11.00%