Reportable Segments Reportable Segments Revenue Reconciliation Line items (Details 1) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting Information [Line Items]
Net operating property income, including discontinued operations	$ 21,490	$ 21,216	$ 44,474	$ 43,252
Direct Costs of Leased and Rented Property or Equipment	14,661	13,072	28,276	24,971
Fee income, Net of Reimbursed Expenses	5,105	4,460	8,995	8,173
Third party management and leasing expense reimbursements	2,353	2,209	4,654	4,457
Reimbursed Expenses	1,357	1,371	2,733	2,883
Residential Lot Multi Family Unit Tract and Outparcel Sales Net of Cost of Sales Including Gain on Sale of Undepreciated Investment Properties	89	4	474	100
Plus residential lot, multi-family unit and outparcel cost of sales	416	76	980	145
Gain/Loss on sale of undepreciated investment properties	30	0	30	0
Net operating income from discontinued operations not included in revenues	(541)	(3,021)	(1,950)	(6,518)
Other Income	266	651	1,731	5,821
Discontinued Operations Other Income	(13)	(89)	(13)	(114)
Total consolidated revenues	$ 45,213	$ 39,949	$ 90,384	$ 83,170