ACQUISITIONS AND DISPOSITIONS ACQUISITIONS AND DISPOSITIONS (Asset Acquisitions) (Details) $ in Thousands	Dec. 30, 2019 USD ($)
Schedule Of Asset Acquisition, By Acquisition [Line Items]
Building	$ 406,091
Tenant improvements	58,869
In-place leases	50,921
Land	46,851
Leasing commission	19,319
Site Improvements	2,241
Legal and marketing costs	19
Total	584,311
The Woodlands Towers at the Waterway
Schedule Of Asset Acquisition, By Acquisition [Line Items]
Building	377,308
Tenant improvements	58,869
In-place leases	49,511
Land	11,044
Leasing commission	18,599
Site Improvements	1,384
Legal and marketing costs	16
Total	516,731
The Woodlands Warehouse
Schedule Of Asset Acquisition, By Acquisition [Line Items]
Building	4,198
Tenant improvements	0
In-place leases	1,410
Land	4,480
Leasing commission	720
Site Improvements	190
Legal and marketing costs	3
Total	11,001
Waterway Land
Schedule Of Asset Acquisition, By Acquisition [Line Items]
Building	0
Tenant improvements	0
In-place leases	0
Land	11,511
Leasing commission	0
Site Improvements	0
Legal and marketing costs	0
Total	11,511
Century Park
Schedule Of Asset Acquisition, By Acquisition [Line Items]
Building	24,585
Tenant improvements	0
In-place leases	0
Land	19,816
Leasing commission	0
Site Improvements	667
Legal and marketing costs	0
Total	$ 45,068