Reportable Segments Reportable Segments (Revenue Reconciliation) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Segment Reporting Information [Line Items]
Residential Lot Sales Net of Cost of Sales Including Gain on Sale of Undepreciated Investment Properties		$ 0
Fee income, Net of Reimbursed Expenses		0
Direct Costs of Leased and Rented Property or Equipment	16,297	12,225
Total consolidated revenues	41,268	34,652
Total Segment [Member]
Segment Reporting Information [Line Items]
Net operating property income, including discontinued operations	26,170	29,257
Residential Lot Sales Net of Cost of Sales Including Gain on Sale of Undepreciated Investment Properties	411	384
Fee income, Net of Reimbursed Expenses	3,654	7,567
Other Income	282	1,507
Direct Costs of Leased and Rented Property or Equipment	(16,297)	(12,225)
Plus residential lot, multi-family unit and outparcel cost of sales	(1,145)	(564)
Net operating income in joint venture	(6,448)	(6,269)
Net sales of joint ventures	(10)	1
Net operating income from discontinued operations not included in revenues	103	(5,639)
Fee income in discontinued operation	(74)	(4,711)
Discontinued Operations Other Income	19	234
Residential Lot Multi Family Unit Tract and Outparcel Sales Net of Cost of Sales Including Gain on Sale of Undepreciated Investment Properties	(243)	0
Total consolidated revenues	$ 41,268	$ 34,652