INTANGIBLES (Details) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Intangible assets:
Goodwill	$ 1,043,075	$ 1,047,497
Accumulated amortization	(748,554)	(655,176)
Net intangible assets	$ 1,853,048	$ 1,772,535
Remaining Weighted Average Amortization Period in Years	21 years 2 months 12 days	19 years 2 months 12 days
Intangible liabilities:
Below market lease intangibles	$ 350,637	$ 256,034
Other lease intangibles	40,851	35,925
Accumulated amortization	(127,426)	(113,647)
Purchase option intangibles	3,568	3,568
Net intangible liabilities	$ 267,630	$ 181,880
Below market leases, remaining weighted average amortization period (in years)	14 years 2 months 12 days	14 years 2 months 12 days
Other lease intangibles, remaining weighted average amortization period (in years)	38 years	30 years 1 month 6 days
Net intangible liabilities, remaining weighted average amortization period (in years)	15 years 10 months 24 days	15 years 7 months 6 days
Above market lease intangibles
Intangible assets:
Intangible assets	$ 186,424	$ 155,161
Remaining Weighted Average Amortization Period in Years	7 years 4 months 24 days	7 years
In-place and other lease intangibles
Intangible assets:
Intangible assets	$ 1,336,284	$ 1,189,261
Remaining Weighted Average Amortization Period in Years	23 years 3 months 18 days	20 years 10 months 24 days
Other intangibles
Intangible assets:
Other intangibles	$ 35,819	$ 35,792
Remaining Weighted Average Amortization Period in Years	10 years 3 months 18 days	8 years 7 months 6 days