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Real Estate Assets and Lease Intangibles (Narratives) (Details) (USD $) | 6 Months Ended |  | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended | 12 Months Ended | 6 Months Ended
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Jun. 30, 2013 | Dec. 31, 2012 sqft | Jun. 30, 2013 Model Home Properties Disposed [Member] | Jun. 30, 2013 Casa Grande Apartments [Member] | Jun. 30, 2012 Model Home One In Texas [Member] | Dec. 31, 2012 Model Home One In Texas [Member] | Jun. 30, 2012 Model Home Nineteen in California [Member] | Dec. 31, 2012 Model Home Nineteen in California [Member] | Jun. 30, 2012 Shoreline Medical Building [Member] | Dec. 31, 2012 Shoreline Medical Building [Member] sqft | Jun. 30, 2012 Model Home in New Jersey and Pennsylvania [Member] | Dec. 31, 2012 Model Home in New Jersey and Pennsylvania [Member] | Jun. 30, 2012 Yucca Valley Retail Center [Member] | Dec. 31, 2012 Yucca Valley Retail Center [Member] sqft | Jun. 30, 2012 The Presidio [Member] | Dec. 31, 2012 The Presidio [Member] | Jun. 30, 2012 Model Homes Fourteen In Texas [Member] | Jun. 30, 2013 Model Home four in Texas [Member] count | Dec. 31, 2012 ModelHomesTwelveInTexas [Member] count | Jun. 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 | 89,315,758 | 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 |  |  | 16 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from Sale of Real Estate |  |  | 5,300,000 | 1,800,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Gain Loss On Sale Of Properties |  |  | 534,555 | 322,356 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Mortgage notes payable retired |  |  | $ 2,200,000 | $ 1,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 141 -Paragraph 51 -Subparagraph d -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Interest rate stated in the contractual debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 19, 20, 22 -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 13, 16 -Article 9 + Details
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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
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- Definition 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. + References No definition available. + Details
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- Definition Cash received for the sale of real estate that is not part of an investing activity during the current period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 24 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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