Summary of Significant Accounting Policies (Detail) (USD $)	6 Months Ended	12 Months Ended
Jun. 30, 2014	Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]
Carrying amount of investment	3,917,000us-gaap_EquityMethodInvestments
Number of Operating Segments	1us-gaap_NumberOfOperatingSegments
Number of reportable segments	2us-gaap_NumberOfReportableSegments
Office Furniture, Fixtures and Equipment and Computer Hardware and Software [Member] \| Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Property, plant and equipment, useful life	5 years
Office Furniture, Fixtures and Equipment and Computer Hardware and Software [Member] \| Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Property, plant and equipment, useful life	7 years
Unconsolidated Joint Venture [Member]
Schedule of Equity Method Investments [Line Items]
Number of unconsolidated joint ventures	6
Number of owned properties	6
Carrying amount of investment	98,100,000
Cole Credit Property Trust, Inc. [Member]
Schedule of Equity Method Investments [Line Items]
Carrying amount of investment	5,000
Unconsolidated Managed Real Estate Investment Trusts [Member]
Schedule of Equity Method Investments [Line Items]
Carrying amount of investment	3,900,000
Member Units [Member]
Schedule of Equity Method Investments [Line Items]
Antidilutive securities excluded from computation of earnings per share	24,771,215	9,591,174

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

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-Name Accounting Standards Codification

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Diluted Earnings Per Share

-URI http://asc.fasb.org/extlink&oid=6510752

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.12)

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-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35755396&loc=d3e33749-111570

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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- Definition

The number of real estate properties owned as of the balance sheet date.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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