ACQUISITIONS AND DISPOSITIONS - Fair Value of Net Assets Acquired (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Business Acquisition [Line Items]
Percentage represent aggregate of assets, less than		10.00%	10.00%
Net assets acquired	$ 0	$ 132,048	$ 19,631
Land
Business Acquisition [Line Items]
Property, plant and equipment	0	52,199	8,290
Land improvements
Business Acquisition [Line Items]
Property, plant and equipment	0	756	0
Buildings and improvements
Business Acquisition [Line Items]
Property, plant and equipment	0	74,522	10,109
Tenant improvements
Business Acquisition [Line Items]
Property, plant and equipment	0	1,451	371
Acquired in-place Leases
Business Acquisition [Line Items]
Intangible assets	$ 0	$ 7,003	1,184
Weighted average amortization period	8 years	8 years
Acquired above-market leases
Business Acquisition [Line Items]
Intangible assets	$ 0	$ 109	$ 37
Weighted average amortization period		2 years	7 years
Acquired below-market leases
Business Acquisition [Line Items]
Intangible assets	$ 0	$ 3,992	$ 360
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