DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Carrying principal balance	$ 682,988	$ 651,455
Weighted Average Maturity in Years at March 31, 2020	5 years 7 months 6 days
Mortgages
Debt Instrument [Line Items]
Carrying principal balance	$ 329,988	$ 331,376
Weighted Average Maturity in Years at March 31, 2020	5 years 6 months
Weighted average interest rate	4.01%	4.02%
Unsecured Debt
Debt Instrument [Line Items]
Carrying principal balance	$ 353,000	$ 320,079
Weighted Average Maturity in Years at March 31, 2020	5 years 8 months 12 days
Unsecured Debt | Line of Credit
Debt Instrument [Line Items]
Carrying principal balance	$ 83,000	50,079
Weighted Average Maturity in Years at March 31, 2020	2 years 4 months 24 days
Unsecured Debt | Term Loans
Debt Instrument [Line Items]
Carrying principal balance	$ 145,000	$ 145,000
Weighted Average Maturity in Years at March 31, 2020	4 years 7 months 6 days
Weighted average interest rate	4.13%	4.11%
Unsecured Debt | Unsecured senior notes (1)
Debt Instrument [Line Items]
Carrying principal balance	$ 125,000	$ 125,000
Weighted Average Maturity in Years at March 31, 2020	9 years 1 month 6 days
Weighted average interest rate	3.78%	3.78%
Unsecured Debt | Primary Line Of Credit | Line of Credit
Debt Instrument [Line Items]
Weighted average interest rate	3.18%	3.81%