DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Carrying principal balance	$ 694,890	$ 648,474
Weighted Average Maturity in Years at June 30, 2019	4 years 2 months 12 days
Mortgages payable - fixed
Debt Instrument [Line Items]
Carrying principal balance	$ 371,951	$ 445,974
Weighted Average Maturity in Years at June 30, 2019	4 years 2 months 12 days
Mortgages
Debt Instrument [Line Items]
Weighted average interest rate	4.37%	4.58%
Unsecured Debt
Debt Instrument [Line Items]
Carrying principal balance	$ 307,939	$ 202,500
Unsecured Debt | Line of Credit
Debt Instrument [Line Items]
Carrying principal balance	$ 162,939	57,500
Weighted Average Maturity in Years at June 30, 2019	3 years 1 month 6 days
Unsecured Debt | Term Loans
Debt Instrument [Line Items]
Carrying principal balance	$ 145,000	$ 145,000
Weighted Average Maturity in Years at June 30, 2019	5 years 4 months 24 days
Weighted average interest rate	4.14%	4.01%
Unsecured Debt | Primary Line Of Credit | Line of Credit
Debt Instrument [Line Items]
Weighted average interest rate	3.94%	3.72%
Unsecured Debt | Operating Line Of Credit | Line of Credit
Debt Instrument [Line Items]
Weighted average interest rate	4.39%	0.00%
Secured Debt | Line of Credit
Debt Instrument [Line Items]
Carrying principal balance	$ 15,000	$ 0
Weighted Average Maturity in Years at June 30, 2019	3 years 2 months 12 days