Assets Held for Sale and Discontinued Operations (Details) (USD $)	3 Months Ended												12 Months Ended
	Dec. 31, 2013 property	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013 property	Dec. 31, 2012	Dec. 31, 2011
Discontinued Operations and Disposal Groups [Abstract]
Number of properties held-for-sale	1												1
Assets held-for-sale, period of sale													1 year
Land	$ 5,109,000												$ 5,109,000
Building and improvements, net	15,181,000												15,181,000
Lease intangibles, net	848,000												848,000
Property held for sale, net	21,138,000				0								21,138,000	0
Receivables and other assets, net	948,000												948,000
Security deposits, prepaid rent and other liabilities	200,000												200,000
Results of operations of property classified as held for sale
Revenues													1,702,000	2,264,000	2,261,000
Expenses													434,000	1,182,000	1,268,000
Income before other income (expense)													1,268,000	1,082,000	993,000
Interest expense related to debt													(161,000)	(514,000)	(573,000)
Income from discontinued operations	$ 382,000	$ 380,000	$ 308,000	$ 37,000	$ 158,000	[1]	$ 143,000	[1]	$ 144,000	[1]	$ 123,000	[1]	$ 1,107,000	$ 568,000	$ 420,000

[1] The quarterly amounts differ from the previously reported amounts in our Annual Report on Form 10-K for the year ended December 31, 2012 as a result of discontinued operations of one property classified as held for sale during 2013.