ACQUISITION AND DISPOSITION OF PROPERTIES AND DISCONTINUED OPERATIONS Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
BALANCE SHEETS
Net real estate	$ 17,991				$ 210,633				$ 17,991	$ 210,633
Rents receivable, net	565				10,484				565	10,484
Deferred charges, net	38				8,531				38	8,531
Prepaid expenses and other assets	1,840				8,629				1,840	8,629
Total assets of discontinued operations	20,434				238,277				20,434	238,277
LIABILITIES
Mortgages payable	0				124,005				0	124,005
Accounts payable and accrued expenses	1,473				4,735				1,473	4,735
Other liabilities	1,034				7,416				1,034	7,416
Total liabilities of discontinued operations	2,507				136,156				2,507	136,156
STATEMENTS OF INCOME
Total revenues									20,920	56,902	57,613
Total expenses									14,102	44,895	48,680
Operating income									6,818	12,007	8,933
Impairment of assets									(6,683)	0	(6,925)
Loss on debt extinguishment									(800)	(2,541)	0
Gain on sale of properties									18,802	71,203	46,830
Income from discontinued operations									18,137	80,669	48,838
Income from discontinued operations attributable to noncontrolling interests									(12,048)	(64,582)	(15,894)
Income from discontinued operations attributable to Common Shareholders	$ 4,675	$ 591	$ 790	$ 33	$ 12,836	$ 1,339	$ 1,227	$ 685	$ 6,089	$ 16,087	$ 32,944