INTANGIBLES (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Intangible assets:
Lease intangible assets	$ 1,334,915	$ 1,502,955
Goodwill	1,049,985	1,050,548
Accumulated amortization	(929,383)	(921,107)
Net intangible assets	$ 1,491,322	$ 1,668,155
Finite-lived intangible assets, remaining amortization period	10 years 6 months	22 years 10 months 24 days
Intangible liabilities:
Below market lease intangibles	$ 352,132	$ 356,771
Other lease intangibles	13,498	31,418
Accumulated amortization	(200,925)	(191,909)
Purchase option intangibles	3,568	3,568
Net intangible liabilities	$ 168,273	$ 199,848
Below market leases, remaining weighted average amortization period (in years)	14 years 6 months	14 years 4 months 24 days
Other lease intangibles, remaining weighted average amortization period (in years)		46 years 6 months
Net intangible liabilities, remaining weighted average amortization period (in years)	14 years 6 months	17 years 2 months 12 days
Above Market Lease Intangibles
Intangible assets:
Lease intangible assets	$ 168,152	$ 181,393
Finite-lived intangible assets, remaining amortization period	6 years 6 months	6 years 8 months 12 days
In-place and Other Lease Intangibles
Intangible assets:
Lease intangible assets	$ 1,166,763	$ 1,321,562
Finite-lived intangible assets, remaining amortization period	11 years	24 years 8 months 12 days
Other Intangibles
Intangible assets:
Other intangibles	$ 35,805	$ 35,759
Finite-lived intangible assets, remaining amortization period	11 years 2 months 12 days	11 years 9 months 18 days