INTANGIBLES (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Intangible assets:
Accumulated amortization	$ (408,429)	$ (352,692)
Goodwill	457,266	490,452
Net intangible assets	1,072,196	1,152,842
Remaining weighted average amortization period	19 years 9 months 18 days	19 years 3 months 18 days
Intangible liabilities:
Accumulated amortization	(98,614)	(78,560)
Purchase option intangibles	36,048	36,048
Net intangible liabilities	395,550	416,361
Remaining weighted average amortization period	15 years 2 months 12 days	15 years 3 months 18 days
Above market lease intangibles
Intangible assets:
Intangibles	214,812	215,367
Remaining weighted average amortization period	9 years 3 months 18 days	9 years 6 months
In-place and other lease intangibles
Intangible assets:
Intangibles	775,736	766,337
Remaining weighted average amortization period	24 years	23 years 3 months 18 days
Other intangibles
Intangible assets:
Intangibles	32,811	33,378
Remaining weighted average amortization period	8 years 7 months 6 days	8 years 7 months 6 days
Below market lease intangibles
Intangible liabilities:
Lease intangibles	429,573	429,907
Remaining weighted average amortization period	15 years 1 month 6 days	15 years 3 months 18 days
Other lease intangibles
Intangible liabilities:
Lease intangibles	$ 28,543	$ 28,966
Remaining weighted average amortization period	15 years 10 months 24 days	15 years 9 months 18 days