OTHER INTANGIBLE ASSETS (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Intangible liabilities
Net	$ (1,562)		$ (1,562)		$ (2,872)
Future accretion of acquisition related intangible liabilities
Net	(1,562)		(1,562)		(2,872)
Acquired Below-Market Leases
Intangible liabilities
Gross balance	(3,521)		(3,521)		(6,618)
Accumulated amortization	1,959		1,959		3,746
Net	(1,562)		$ (1,562)		$ (2,872)
Average useful life (in years)			4 years		4 years
Future accretion of acquisition related intangible liabilities
2019 (Three months ending December 31, 2019)	(280)		$ (280)
2020	(701)		(701)
2021	(347)		(347)
2022	(234)		(234)
2023	0		0
Thereafter	0		0
Net	(1,562)		(1,562)		$ (2,872)
Acquired Above-Market Leases
Intangible assets
Gross balance	74		74		146
Accumulated amortization	(38)		(38)		(51)
Net	36		$ 36		$ 95
Average useful life (in years)			5 years		3 years
Amortization
Amortization expense	17	$ 14	$ 59	$ 40
Future amortization of acquisition related intangible assets
2019 (Three months ending December 31, 2019)	4		4
2020	9		9
2021	5		5
2022	5		5
2023	6		6
Thereafter	7		7
Net	36		36		$ 95
Acquired In-Place Leases
Intangible assets
Gross balance	13,653		13,653		16,210
Accumulated amortization	(8,906)		(8,906)		(9,731)
Net	4,747		$ 4,747		$ 6,479
Average useful life (in years)			8 years		8 years
Amortization
Amortization expense	495	927	$ 1,636	2,769
Future amortization of acquisition related intangible assets
2019 (Three months ending December 31, 2019)	476		476
2020	1,349		1,349
2021	899		899
2022	663		663
2023	375		375
Thereafter	985		985
Net	4,747		4,747		$ 6,479
Trade Name and License
Intangible assets
Gross balance	2,957		2,957		2,957
Accumulated amortization	0		0		0
Net	2,957		2,957		2,957
Future amortization of acquisition related intangible assets
Net	2,957		2,957		$ 2,957
Rental and Other Property Income | Acquired Below-Market Leases
Amortization
Amortization expense	$ 376	$ 478	$ 1,310	$ 1,711