ACQUISITION AND DISPOSITION OF PROPERTIES AND DISCONTINUED OPERATIONS Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended			36 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2011
ASSETS
Net real estate					$ 20,981					$ 20,981
Rents receivable, net					649					649
Deferred charges, net of amortization					2,016					2,016
Prepaid expenses and other assets, net					155					155
Total assets of discontinued operations	0				23,801				0	23,801		0
LIABILITIES
Accounts payable and accrued expenses					233					233
Other liabilities					342					342
Total liabilities of discontinued operations	0				575				0	575		0
STATEMENTS OF OPERATIONS
Total revenues									5,309	11,913	12,902
Total expenses									3,047	8,581	9,183
Operating Income									2,262	3,332	3,719
Loss on Impairment of asset									(6,925)	0	0
Gain on sale of property									46,830	0	7,143	53,973
Income from discontinued operations									42,167	3,332	10,862
(Income) from discontinued operations, attributable to noncontrolling interests									(10,674)	(1,535)	(6,303)
Income from discontinued operations, attributable to Common Shareholders	$ 4,098	$ 168	$ 25,989	$ 1,238	$ 423	$ 525	$ 548	$ 301	$ 31,493	$ 1,797	$ 4,559