Reportable Segments Table (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Segment Reporting Information [Line Items]
Severance Costs	$ 0	$ (79)	$ 0	$ (292)
Reimbursed Expenses	(1,359)	(1,357)	(3,268)	(2,732)
Preferred Stock Dividends	(3,227)	(3,227)	(6,454)	(6,454)
NET INCOME (LOSS) AVAILABLE TO COMMON STOCKHOLDERS	(5,579)	6,401	47,593	(6,711)
Office Segment [Member]
Segment Reporting Information [Line Items]
Net operating property income, including discontinued operations	23,894	20,013	45,731	40,611
Residential lot and other sales, net of cost of sales	0	0	0	0
Fee income, Net of Reimbursed Expenses	0	0	0	0
Other Income	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 Including Discontinued Operations	0	0	0	0
Other nonoperating expense, including discontinued operations	0	0	0	0
Preferred Stock Dividends	0	0	0	0
Funds from Operations Available to Common Stockholders	23,894	20,013	45,731	40,611
Retail Segment [Member]
Segment Reporting Information [Line Items]
Net operating property income, including discontinued operations	4,303	7,415	8,593	16,073
Residential lot and other sales, net of cost of sales	0	0	0	0
Fee income, Net of Reimbursed Expenses	0	0	0	0
Other Income	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 Including Discontinued Operations	0	0	0	0
Other nonoperating expense, including discontinued operations	0	0	0	0
Preferred Stock Dividends	0	0	0	0
Funds from Operations Available to Common Stockholders	4,303	7,415	8,593	16,073
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	276	90	519	474
Fee income, Net of Reimbursed Expenses	0	0	0	0
Other Income	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 Including Discontinued Operations	0	0	0	0
Other nonoperating expense, including discontinued operations	0	0	0	0
Preferred Stock Dividends	0	0	0	0
Funds from Operations Available to Common Stockholders	276	90	519	474
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	3	6,029	77	10,740
Other Income	0	0	0	0
Third party management and leasing expenses	(27)	(4,607)	(80)	(8,907)
Severance Costs	0	0	0	0
General and administrative expenses	0	0	0	0
Reimbursed Expenses	0	0	0	0
Interest Expense Including Discontinued Operations	0	0	0	0
Other nonoperating expense, including discontinued operations	0	0	0	0
Preferred Stock Dividends	0	0	0	0
Funds from Operations Available to Common Stockholders	(24)	1,422	(3)	1,833
All Other Segments [Member]
Segment Reporting Information [Line Items]
Net operating property income, including discontinued operations	377	0	420	1
Residential lot and other sales, net of cost of sales	(8)	53	160	52
Fee income, Net of Reimbursed Expenses	2,931	2,786	6,511	5,642
Other Income	2,064	112	2,346	1,619
Third party management and leasing expenses	0	0	0	0
Severance Costs	0	(79)	0	(292)
General and administrative expenses	(4,552)	(5,646)	(10,621)	(12,269)
Reimbursed Expenses	(1,359)	(1,357)	(3,269)	(2,733)
Interest Expense Including Discontinued Operations	(6,573)	(6,937)	(13,218)	(14,384)
Other nonoperating expense, including discontinued operations	(1,288)	(1,493)	(2,440)	(3,533)
Preferred Stock Dividends	(5,883)	(3,227)	(9,110)	(6,454)
Funds from Operations Available to Common Stockholders	(14,291)	(15,788)	(29,221)	(32,351)
Total Segment [Member]
Segment Reporting Information [Line Items]
Net operating property income, including discontinued operations	28,574	27,428	54,744	56,685
Residential lot and other sales, net of cost of sales	268	143	679	526
Fee income, Net of Reimbursed Expenses	2,934	8,815	6,588	16,382
Other Income	2,064	112	2,346	1,619
Third party management and leasing expenses	(27)	(4,607)	(80)	(8,907)
Severance Costs	0	(79)	0	(292)
General and administrative expenses	(4,552)	(5,646)	(10,621)	(12,269)
Reimbursed Expenses	(1,359)	(1,357)	(3,269)	(2,733)
Interest Expense Including Discontinued Operations	(6,573)	(6,937)	(13,218)	(14,384)
Other nonoperating expense, including discontinued operations	(1,288)	(1,493)	(2,440)	(3,533)
Preferred Stock Dividends	(5,883)	(3,227)	(9,110)	(6,454)
Funds from Operations Available to Common Stockholders	14,158	13,152	25,619	26,640
Real Estate Depreciation and Amortization Including Company's Share of Joint Ventures	(19,953)	(15,022)	(35,273)	(31,575)
Noncontrolling Interest Related to Gain on Sale of Depreciable Investment Property		0		(10,190)
Gain (Loss) on Sale of Depreciable Investment Properties	216	8,271	57,247	8,414
NET INCOME (LOSS) AVAILABLE TO COMMON STOCKHOLDERS	$ (5,579)	$ 6,401	$ 47,593	$ (6,711)