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Investments in Real Estate - Additional Information (Detail) | 6 Months Ended |
--- | --- | ---
Jun. 30, 2017 USD ($) Property | Dec. 31, 2016 USD ($)
Real Estate Properties Base Purchase Price [Abstract] |  |
Number of multifamily properties owned | Property | 46 |
Number of units located with multifamily properties | Property | 12,812 |
Real estate held for sale | $ | $ 21,964,000 | $ 60,786,000
Purchase price allocation adjustments | $ | $ 0 |

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- Definition Purchase price allocation adjustments. + References No definition available. + Details
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- Definition Real estate properties base purchase price. + References No definition available. + Details
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Namespace Prefix: | irt_
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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 The number of units in a real estate property owned as of the balance sheet date. + References No definition available. + Details
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- Definition Carrying amount as of the balance sheet date of investments in land and buildings held for sale, excluding real estate considered to be inventory of the entity. + 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 210.7-03.1(f)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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