ACQUISITIONS AND DISPOSITIONS - Fair Value of Net Assets Acquired (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Net assets acquired	$ 132,048	$ 19,631	$ 0
Percentage represent aggregate of assets, less than	10.00%	10.00%
Land
Business Acquisition [Line Items]
Property, plant and equipment	$ 52,199	$ 8,290	0
Land improvements
Business Acquisition [Line Items]
Property, plant and equipment	756	0	0
Buildings and improvements
Business Acquisition [Line Items]
Property, plant and equipment	74,522	10,109	0
Tenant improvements
Business Acquisition [Line Items]
Property, plant and equipment	1,451	371	0
Acquired in-place Leases
Business Acquisition [Line Items]
Intangible assets	$ 7,003	$ 1,184	0
Weighted average amortization period	8 years	9 years
Acquired above-market leases
Business Acquisition [Line Items]
Intangible assets	$ 109	$ 37	0
Weighted average amortization period	2 years	7 years
Acquired below-market leases
Business Acquisition [Line Items]
Intangible assets	$ 3,992	$ 360	$ 0
Weighted average amortization period	3 years	2 years
2018 Acquisitions | Acquired in-place Leases
Business Acquisition [Line Items]
Weighted average amortization period	3 years
2017 Acquisitions | Acquired in-place Leases
Business Acquisition [Line Items]
Weighted average amortization period		5 years