Reportable Segments Table (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Residential lot and other sales, net of cost of sales				$ 0
Fee income, Net of Reimbursed Expenses				0
Other Income				0
Severance Costs	(520,000)	(574,000)	(520,000)	(866,000)
Reimbursed Expenses	(1,097,000)	(1,235,000)	(4,365,000)	(3,968,000)
Gains (Losses) on Extinguishment of Debt	0	0	0	(94,000)
Preferred Stock Dividends	(1,777,000)	(3,226,000)	(8,231,000)	(9,680,000)
Noncontrolling Interest Related to Gain on Sale of Depreciated Investment Properties	(3,390,000)		(3,390,000)
Other reconciling item				59,000
NET LOSS AVAILABLE TO COMMON STOCKHOLDERS	59,381,000	9,444,000	106,975,000	2,733,000
Office Segment [Member]
Segment Reporting Information [Line Items]
Net operating property income, including discontinued operations	30,308,000	20,451,000	76,039,000	61,062,000
Residential lot and other sales, net of cost of sales	0	0	0
Fee income, Net of Reimbursed Expenses	0	0	0
Other Income	0	0	0	0
Gain on Sale of Third Party Management Operations	0	0	0	0
Third party management and leasing expenses	0	0	0	0
Severance Costs	0	0	0	0
General and administrative expenses	0	0	0	0
Reimbursed Expenses	0	0	0	0
Interest Expense	0	0	0	0
Asset Impairment Charges		0		0
Gains (Losses) on Extinguishment of Debt				0
Other expenses	0	0	0	0
Preferred Stock Dividends	0	0	0	0
Funds from Operations Available to Common Stockholders	30,308,000	20,451,000	76,039,000	61,062,000
Retail Segment [Member]
Segment Reporting Information [Line Items]
Net operating property income, including discontinued operations	3,663,000	7,168,000	12,255,000	23,241,000
Residential lot and other sales, net of cost of sales	0	0	0
Fee income, Net of Reimbursed Expenses	0	0	0	0
Other Income	0	0	0	0
Gain on Sale of Third Party Management Operations	0	0	0	0
Third party management and leasing expenses	0	0	0	0
Severance Costs	0	0	0	0
General and administrative expenses	0	0	0	0
Reimbursed Expenses	0	0	0	0
Interest Expense	0	0	0	0
Asset Impairment Charges		0		0
Gains (Losses) on Extinguishment of Debt				0
Other expenses	0	0	0	0
Preferred Stock Dividends	0	0	0	0
Funds from Operations Available to Common Stockholders	3,663,000	7,168,000	12,255,000	23,241,000
Land [Member]
Segment Reporting Information [Line Items]
Net operating property income, including discontinued operations	0	0	0	0
Residential lot and other sales, net of cost of sales	725,000	378,000	1,244,000	852,000
Fee income, Net of Reimbursed Expenses	0	0	0	0
Other Income	0	0	0
Gain on Sale of Third Party Management Operations	0	0	0	0
Third party management and leasing expenses	0	0	0	0
Severance Costs	0	0	0	0
General and administrative expenses	0	0	0	0
Reimbursed Expenses	0	0	0	0
Interest Expense	0	0	0	0
Asset Impairment Charges		0		0
Gains (Losses) on Extinguishment of Debt				0
Other expenses	0	0	0	0
Preferred Stock Dividends	0	0	0	0
Funds from Operations Available to Common Stockholders	725,000	378,000	1,244,000	852,000
Third Party Management [Member]
Segment Reporting Information [Line Items]
Net operating property income, including discontinued operations	0	0	0	0
Residential lot and other sales, net of cost of sales	0	0	0	0
Fee income, Net of Reimbursed Expenses	0	4,789,000	76,000	15,529,000
Other Income	0	0	0
Gain on Sale of Third Party Management Operations	4,531,000	7,384,000	4,531,000	7,384,000
Third party management and leasing expenses	14,000	(4,260,000)	(94,000)	(13,167,000)
Severance Costs	0	0	0	0
General and administrative expenses	0	0	0	0
Reimbursed Expenses	0	0	0	0
Interest Expense	0	0	0	0
Asset Impairment Charges		0		0
Gains (Losses) on Extinguishment of Debt				0
Other expenses	0	0	0	0
Preferred Stock Dividends	0	0	0	0
Funds from Operations Available to Common Stockholders	4,517,000	7,913,000	4,513,000	9,746,000
All Other Segments [Member]
Segment Reporting Information [Line Items]
Net operating property income, including discontinued operations	861,000	0	1,280,000	1,000
Residential lot and other sales, net of cost of sales	(6,000)	0	154,000	52,000
Fee income, Net of Reimbursed Expenses	2,420,000	7,343,000	8,931,000	12,985,000
Other Income	303,000	3,329,000	2,649,000	4,948,000
Gain on Sale of Third Party Management Operations	0	0	0	0
Third party management and leasing expenses	0	0	0	0
Severance Costs	(520,000)	(574,000)	(520,000)	(866,000)
General and administrative expenses	(6,635,000)	(5,255,000)	(17,256,000)	(17,524,000)
Reimbursed Expenses	(1,097,000)	(1,235,000)	(4,366,000)	(3,968,000)
Interest Expense	(7,224,000)	(6,759,000)	(20,442,000)	(21,143,000)
Asset Impairment Charges		488,000		(488,000)
Gains (Losses) on Extinguishment of Debt				(94,000)
Other expenses	(8,312,000)	(3,360,000)	(10,749,000)	(6,799,000)
Preferred Stock Dividends	(1,777,000)	(3,226,000)	(10,887,000)	(9,680,000)
Funds from Operations Available to Common Stockholders	(21,987,000)	(10,225,000)	(51,206,000)	(42,576,000)
Total Segment [Member]
Segment Reporting Information [Line Items]
Net operating property income, including discontinued operations	34,832,000	27,619,000	89,574,000	84,304,000
Residential lot and other sales, net of cost of sales	719,000	378,000	1,398,000	904,000
Fee income, Net of Reimbursed Expenses	2,420,000	12,132,000	9,007,000	28,514,000
Other Income	303,000	3,329,000	2,649,000	4,948,000
Gain on Sale of Third Party Management Operations	4,531,000	7,384,000	4,531,000	7,384,000
Third party management and leasing expenses	14,000	(4,260,000)	(94,000)	(13,167,000)
Severance Costs	(520,000)	(574,000)	(520,000)	(866,000)
General and administrative expenses	(6,635,000)	(5,255,000)	(17,256,000)	(17,524,000)
Reimbursed Expenses	(1,097,000)	(1,235,000)	(4,366,000)	(3,968,000)
Interest Expense	(7,224,000)	(6,759,000)	(20,442,000)	(21,143,000)
Asset Impairment Charges		488,000		(488,000)
Gains (Losses) on Extinguishment of Debt				(94,000)
Other expenses	(8,312,000)	(3,360,000)	(10,749,000)	(6,799,000)
Preferred Stock Dividends	(1,777,000)	(3,226,000)	(10,887,000)	(9,680,000)
Funds from Operations Available to Common Stockholders	17,226,000	25,685,000	42,845,000	52,325,000
Real Estate Depreciation and Amortization Including Company's Share of Joint Ventures	(21,890,000)	(16,361,000)	(57,162,000)	(47,936,000)
Impairment of Real Estate				(10,190,000)
Gain (Loss) on Sale of Depreciable Investment Properties	67,435,000	120,000	124,682,000	8,475,000
NET LOSS AVAILABLE TO COMMON STOCKHOLDERS	$ 59,381,000	$ 9,444,000	$ 106,975,000	$ 2,733,000