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v3.19.3

Organization (Details) ft² in Millions | 9 Months Ended
--- | ---
Sep. 30, 2019 ft² joint_venture property | Sep. 30, 2018 ft² joint_venture property
Entity Information [Line Items] |  |
Number of operating real estate joint ventures | joint_venture | 1 |
Corporate Joint Venture |  |
Entity Information [Line Items] |  |
Number of retail properties | joint_venture |  | 1
Area of real estate | ft² | 2.6 | 3.0
Number of managed assets | property | 11 | 14
Retail |  |
Entity Information [Line Items] |  |
Area of real estate | ft² | 9.3 | 10.5
Retail |  |
Entity Information [Line Items] |  |
Number of retail properties | property | 57 | 63

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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: | dei_EntityInformationLineItems
Namespace Prefix: | dei_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Number Of Joint Ventures + References No definition available. + Details
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Namespace Prefix: | ivtp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Number of Managed Assets + References No definition available. + Details
Name: | ivtp_NumberofManagedAssets
Namespace Prefix: | ivtp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Area of a real estate property. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | num:areaItemType
Balance Type: | na
Period Type: | instant

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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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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |