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Acquired Properties - Summary of Retail Properties Acquired (Details) ft² in Thousands, $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 USD ($) ft² | Mar. 31, 2018 USD ($)
Real Estate Properties [Line Items] |  |
Capitalized acquisition costs | $ 608 | $ 0
Retail |  |
Real Estate Properties [Line Items] |  |
Gross Acquisition Price | $ 86,750 |
Square Feet | ft² | 168 |
Commons at University Place | Retail |  |
Real Estate Properties [Line Items] |  |
Gross Acquisition Price | $ 23,250 |
Square Feet | ft² | 92 |
Lakeside Winter Park and Lakeside Crossings | Retail |  |
Real Estate Properties [Line Items] |  |
Gross Acquisition Price | $ 63,500 |
Square Feet | ft² | 76 |

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- Definition Asset Acquisition, Consideration Transferred + References No definition available. + Details
Name: | ivtp_AssetAcquisitionConsiderationTransferred
Namespace Prefix: | ivtp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Asset Acquisition, Transaction Costs Capitalized During the Period + References No definition available. + Details
Name: | ivtp_AssetAcquisitionTransactionCostsCapitalizedDuringthePeriod
Namespace Prefix: | ivtp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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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
Name: | us-gaap_NumberOfUnitsInRealEstateProperty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition 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. + References No definition available. + Details
Name: | us-gaap_RealEstatePropertiesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | srt_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis=srt_RetailSiteMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ivtp_AssetAcquisitionAxis=ivtp_CommonsatUniversityPlaceRaleighCaryNCMSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | ivtp_AssetAcquisitionAxis=ivtp_LakesideWinterParkandLakesideCrossingsOrlandoKissimmeeSanfordFLMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |