DEBT - Schedule of Debt (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Total debt	$ 695,363	$ 721,316
Weighted average maturity (in years)	4 years 11 months 1 day
Weighted average interest rate	3.70%	3.62%
Mortgages
Debt Instrument [Line Items]
Total debt	$ 288,363	$ 298,445
Weighted average maturity (in years)	4 years 10 months 13 days
Weighted average interest rate	3.90%	3.93%
Unsecured Debt
Debt Instrument [Line Items]
Total debt	$ 407,000	$ 422,871
Weighted average maturity (in years)	4 years 11 months 15 days
Unsecured Debt | Line of Credit
Debt Instrument [Line Items]
Total debt	$ 87,000	152,871
Weighted average maturity (in years)	1 year 2 months 1 day
Unsecured Debt | Term Loans
Debt Instrument [Line Items]
Total debt	$ 145,000	$ 145,000
Weighted average maturity (in years)	3 years 4 months 20 days
Weighted average interest rate	4.15%	4.15%
Unsecured Debt | Unsecured senior notes
Debt Instrument [Line Items]
Total debt	$ 175,000	$ 125,000
Weighted average maturity (in years)	8 years 1 month 24 days
Weighted average interest rate	3.47%	3.78%
Unsecured Debt | Primary Line Of Credit | Line of Credit
Debt Instrument [Line Items]
Weighted average interest rate	2.21%	2.85%