Assets Held for Sale and Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013 property	Sep. 30, 2012	Sep. 30, 2013 property	Sep. 30, 2012	Dec. 31, 2012
Discontinued Operations and Disposal Groups [Abstract]
Number of properties held-for-sale	1		1
Assets Held-for-sale, period of sale			1 year
Land	$ 5,109		$ 5,109
Building and improvements, net	15,181		15,181
Lease intangibles, net	848		848
Property held for sale, net	21,138		21,138		0
Receivables and other assets, net	1,009		1,009
Security deposits, prepaid rent and other liabilities	181		181
Revenues:
Rental income	443	566	1,257	1,697
Expenses:
Rental	63	65	200	216
Depreciation and amortization	0	230	171	688
Total expenses	63	295	371	904
Income before other income (expense)	380	271	886	793
Other income (expense):
Interest expense related to debt	0	(128)	(161)	(383)
Income from discontinued operations	$ 380	$ 143	$ 725	$ 410