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v3.7.0.1

Subsequent Events (Details) $ in Thousands | 1 Months Ended | 6 Months Ended
--- | --- | ---
Aug. 11, 2017 USD ($) ft² Properties | Jun. 30, 2017 USD ($) ft² Properties | Jun. 30, 2016 USD ($) Properties
Subsequent Event [Line Items] |  |  |
Gross disposition price |  |  | $ 1,728,600
Retail [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Number of disposed assets | Properties |  | 3 | 18
Square Footage | ft² |  | 742,000 |
Gross disposition price |  | $ 99,330 |
Retail [Member] | Subsequent Event [Member] |  |  |
Subsequent Event [Line Items] |  |  |
Number of disposed assets | Properties | 2 |  |
Square Footage | ft² | 358,000 |  |
Gross disposition price | $ 31,950 |  |

X
- Definition Discontinued operation, gross disposition price + References No definition available. + Details
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Namespace Prefix: | ivtp_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Number of disposed assets. + References No definition available. + Details
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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 Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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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_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |