PREPAID EXPENSES AND OTHER ASSETS (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Intangible assets:
Gross Asset	$ 1,462,973	$ 1,511,162
Accumulated Amortization	(459,656)	(449,185)
Balance	1,003,317	1,061,977
Remaining prepaid expenses and other assets:
Security and escrow deposits	167,540	181,481
Prepaid expenses	57,624	54,514
Other non-tenant receivables	5,666	12,450
Deferred tax, net of valuation allowances	1,436	902
Other	14,055	18,141
Total remaining Prepaid expenses and other assets	246,321	267,488
Total Prepaid expenses and other assets	1,249,638	1,329,465
Above-market tenant leases net
Intangible assets:
Gross Asset	1,181,928	1,230,117
Accumulated Amortization	(433,586)	(425,837)
Balance	748,342	804,280
Below-market ground leases net
Intangible assets:
Gross Asset	169,539	169,539
Accumulated Amortization	(10,970)	(9,825)
Balance	158,569	159,714
Real estate tax stabilization agreement net
Intangible assets:
Gross Asset	111,506	111,506
Accumulated Amortization	(15,100)	(13,523)
Balance	$ 96,406	$ 97,983