Reportable Segments Reportable Segments (Revenue Reconciliation) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Segment Reporting Information [Line Items]
Document Fiscal Year Focus			2013
Residential Lot Sales Net of Cost of Sales Including Gain on Sale of Undepreciated Investment Properties				$ 0
Fee income, Net of Reimbursed Expenses				0
Other Income				0
Direct Costs of Leased and Rented Property or Equipment	(22,730)	(13,946)	(57,135)	(38,317)
Total consolidated revenues	52,075	39,286	136,129	105,160
Total Segment [Member]
Segment Reporting Information [Line Items]
Net operating property income, including discontinued operations	34,832	27,619	89,574	84,304
Residential Lot Sales Net of Cost of Sales Including Gain on Sale of Undepreciated Investment Properties	719	378	1,398	904
Fee income, Net of Reimbursed Expenses	2,420	12,132	9,007	28,514
Other Income	303	3,329	2,649	4,948
Direct Costs of Leased and Rented Property or Equipment	22,730	13,946	57,135	38,317
Plus residential lot, multi-family unit and outparcel cost of sales	147	354	1,543	1,333
Net operating income in joint venture	(7,547)	(5,889)	(21,425)	(18,069)
Net sales of joint ventures	(109)	0	(111)	3
Net operating income from discontinued operations not included in revenues	(814)	(4,560)	(2,454)	(16,188)
Fee income in discontinued operation	0	(4,789)	(76)	(15,529)
Discontinued Operations Other Income	4	3,234	(9)	3,407
Residential Lot Multi Family Unit Tract and Outparcel Sales Net of Cost of Sales Including Gain on Sale of Undepreciated Investment Properties	(602)	0	(1,120)	30
Total consolidated revenues	$ 52,075	$ 39,286	$ 136,129	$ 105,160