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Real Estate Assets and Lease Intangibles (Narratives) (Details) (USD $)	9 Months Ended		9 Months Ended			12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended		12 Months Ended	9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012 sqft	Sep. 30, 2013 Model Home Properties Disposed [Member]	Sep. 30, 2013 Casa Grande Apartments [Member]	Sep. 30, 2012 Model Home One In Texas [Member]	Dec. 31, 2012 Model Home One In Texas [Member]	Sep. 30, 2012 Model Home Nineteen in California [Member]	Dec. 31, 2012 Model Home Nineteen in California [Member]	Sep. 30, 2012 Shoreline Medical Building [Member]	Dec. 31, 2012 Shoreline Medical Building [Member] sqft	Sep. 30, 2012 Model Home in New Jersey and Pennsylvania [Member]	Dec. 31, 2012 Model Home in New Jersey and Pennsylvania [Member]	Sep. 30, 2012 Yucca Valley Retail Center [Member]	Dec. 31, 2012 Yucca Valley Retail Center [Member] sqft	Sep. 30, 2012 The Presidio [Member]	Dec. 31, 2012 The Presidio [Member]	Sep. 30, 2012 Model Homes Fourteen In Texas [Member]	Sep. 30, 2013 Model Home four in Texas [Member] count	Dec. 31, 2012 ModelHomesTwelveInTexas [Member] count	Sep. 30, 2013 Sparkys Lancaster Self Storage [Member] sqft count
Real Estate and Accumulated Depreciation Disclosure [Abstract]
Finite Lived Intangible Asset Useful Life	14 years
Business Acquisition [Line Items]
Acquisition Date	May 01, 2013				Jan. 01, 2012		Apr. 01, 2012		Jun. 01, 2012		Jun. 01, 2012		May 01, 2012		Nov. 01, 2012		Dec. 01, 2012	Jan. 01, 2013		May 01, 2013
Number Of Real Estate Properties																		4	14
Purchase Price for the properties					$ 365,000	$ 380,000		$ 8,200,000		$ 6,400,000		$ 5,000,000		$ 1,100,000		$ 7,300,000		$ 1,100,000	$ 3,900,000	$ 3,700,000
Cash Payment for the properties acquired					146,000	150,000		3,700,000		2,300,000		2,000,000		1,100,000		1,600,000		500,000	2,000,000
Promissory note paid	89,248,344	92,480,363			219,000	230,000		4,500,000				3,000,000						600,000	1,900,000
Rentable square feet		80,800								15,335				17,600						71,000
Debt Instrument, Interest Rate, Stated Percentage										5.10%						5.60%
Number of Units in Real Estate Property																				608
Area of Land										38,600
Occupancy Rate																				65.00%
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number Of Real Estate Properties Sold			24
Proceeds from Sale of Real Estate			7,100,000	1,800,000
Gain Loss On Sale Of Properties			704,015	322,356
Mortgage notes payable retired			$ 3,500,000	$ 1,300,000

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Area of land held.

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The total cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, the fair value of the liabilities assumed, and direct costs of the acquisition.

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Interest rate stated in the contractual debt agreement.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method.

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Including the current and noncurrent portions, aggregate carrying amount of all types of notes payable, as of the balance sheet date, with initial maturities beyond one year or beyond the normal operating cycle, if longer.

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Aggregate cash payments for a combination of transactions that are classified as investing activities in which assets, which may include securities, other types of investments, or productive assets, are purchased from third-party sellers. This element can be used by entities to aggregate payments for all asset purchases that are classified as investing activities.

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