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Pro Forma of Financial Information Purport to Represent Result of Operations (Detail) - USD ($) $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Real Estate Properties [Line Items]
Total revenue of real estate property acquired, as reported	$ 597
Net income (loss) allocable to common shares of real estate property acquired, as reported	$ 228
Earnings (loss) per share attributable to common shareholders of real estate property acquired
Basic and diluted-as reported	$ 0.01	$ 0.00
Pro forma revenue of real estate properties acquired (unaudited)	$ 1,469	$ 1,257
Pro forma net income (loss) allocable to common shares of real estate property acquired (unaudited)	$ 550	$ 424
Earnings (loss) per share attributable to common shareholders of real estate property acquired
Basic and diluted-as pro forma (unaudited)	$ 0.02	$ 0.03

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Business Acquisition, Pro Forma, Earnings Per Share [Abstract]

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Business Acquisition Pro Forma Earnings Per Share Basic And Diluted

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The pro forma net Income or Loss for the period as if the business combination or combinations had been completed at the beginning of a period.

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-Publisher FASB



-Name Accounting Standards Codification



-Topic 805



-SubTopic 10



-Section 50



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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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This element represents the amount of earnings or loss of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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This element represents the amount of revenue of the acquiree since the acquisition date included in the consolidated income statement for the reporting period.

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The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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