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Investment in Real Estate - Additional Information (Detail) $ in Thousands, ft² in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2015 USD ($) ft² Property | Sep. 30, 2014 USD ($) | Sep. 30, 2015 USD ($) ft² Property | Sep. 30, 2014 USD ($) Property | Dec. 31, 2014 Property
Real Estate [Abstract] |  |  |  |  |
Number of industrial properties acquired |  |  | 3 |  |
Gross leasable area (GLA) of industrial properties acquired | ft² |  |  | 0.6 |  |
Purchase price of acquisitions | $ | $ 72,961 |  | $ 72,961 |  |
Number of industrial properties held for sale | 7 |  | 7 |  |
Gross leasable area (GLA) of industrial properties held for sale | ft² | 0.3 |  | 0.3 |  |
Number of industrial properties sold |  |  | 15 |  |
Gross leasable area (GLA) of industrial properties sold | ft² |  |  | 1.0 |  |
Proceeds from the sale of industrial properties | $ |  |  | $ 50,060 |  |
Gain on sale of real estate | $ |  |  | 13,084 | $ 14,483 |
Number of sold industrial properties included in discontinued operations |  |  |  | 20 | 29
Impairment of Real Estate | $ | $ 626 | $ 0 | $ 626 | $ 0 |

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- Definition Number of industrial properties sold. + References No definition available. + Details
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- Definition The number of sold industrial properties included in discontinued operations. + References No definition available. + Details
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- Definition Number of industrial properties held for sale. + References No definition available. + Details
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- Definition Square footage of industrial properties sold. + References No definition available. + Details
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- Definition Square Footage of Real Estate Properties Acquired. + References No definition available. + Details
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- Definition Square footage of industrial properties held for sale. + References No definition available. + Details
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- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=35744172&loc=d3e2207-128464 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=56956791&loc=d3e4845-128472 + 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=56944662&loc=d3e3602-108585 + Details
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- Definition The charge against earnings in the period to reduce the carrying amount of real property to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=51719941&loc=d3e2921-110230 Reference 2: 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=56944662&loc=d3e3602-108585 + Details
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- Definition The cash inflow from sale of buildings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: 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=56944662&loc=d3e3179-108585 + Details
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