INTANGIBLES (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Intangible assets and liabilities
Amortization/accretion of intangible assets and liabilities	$ 2,500,000	$ 2,000,000	$ 800,000
Estimated future amortization
2013	2,000,000
2014	1,900,000
2015	1,700,000
2016	1,600,000
2017	1,700,000
Thereafter	21,900,000
In-place value tenant leases
Intangible assets and liabilities
Gross Assets	20,348,000	23,586,000
Accumulated Amortization	(8,832,000)	(11,721,000)
Net Carrying Amount	11,516,000	11,865,000
Above-market tenant leases
Intangible assets and liabilities
Gross Assets	1,904,000	2,952,000
Accumulated Amortization	(8,000)	(1,938,000)
Net Carrying Amount	1,896,000	1,014,000
Below-market tenant leases
Intangible assets and liabilities
Accumulated Amortization	(35,000)
Gross Liability	(319,000)	(347,000)
Accumulated Accretion		28,000
Net Carrying Amount	(354,000)	(319,000)
Above-market ground leases
Intangible assets and liabilities
Gross Liability	(3,546,000)	(3,545,000)
Accumulated Accretion	956,000	797,000
Net Carrying Amount	(2,590,000)	(2,748,000)
Below-market ground leases
Intangible assets and liabilities
Gross Assets	23,096,000	23,096,000
Accumulated Amortization	(2,755,000)	(2,416,000)
Net Carrying Amount	$ 20,341,000	$ 20,680,000