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Disposed Properties - Narrative (Details)	6 Months Ended
	Jun. 30, 2021 property
Discontinued Operations and Disposal Groups [Abstract]
Number of partial condemnations	3

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- Definition

Disposal Group, Not Discontinued Operation, Number Of Properties

+ References

No definition available.

+ Details

Name:	ivtp_DisposalGroupNotDiscontinuedOperationNumberOfProperties
Namespace Prefix:	ivtp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_DiscontinuedOperationsAndDisposalGroupsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration