Revenue Recognition - Disaggregation of Lease Income (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Disaggregation of Revenue [Line Items]
Minimum base rent	$ 41,559	$ 36,535	$ 123,580	$ 108,309
Lease income, net	63,716	57,859	192,814	174,562
(Provision for) reversal of uncollectible straight-line rent, net	(107)	48	109	1,046
Provision for uncollectible billed rent and recoveries	(461)	(260)	(927)	(640)
Real estate tax recoveries
Disaggregation of Revenue [Line Items]
Lease income, net	7,808	8,137	24,273	23,143
Common area maintenance, insurance, and other recoveries
Disaggregation of Revenue [Line Items]
Lease income, net	7,913	7,166	22,351	20,462
Ground rent income
Disaggregation of Revenue [Line Items]
Lease income, net	4,797	3,808	14,304	11,178
Amortization of market-lease intangibles and inducements, net
Disaggregation of Revenue [Line Items]
Lease income, net	629	985	2,717	4,594
Short-term and other lease income
Disaggregation of Revenue [Line Items]
Lease income, net	661	674	2,610	2,858
Termination fee income
Disaggregation of Revenue [Line Items]
Lease income, net	75	35	819	352
Straight-line rent adjustment, net
Disaggregation of Revenue [Line Items]
Lease income, net	837	709	2,383	2,079
Reversal of uncollectible billed rent and recoveries
Disaggregation of Revenue [Line Items]
Lease income, net	$ 5	$ 22	$ 595	$ 1,181

(Provision for) Reversal of Uncollectible Straight-Line Rent, Net

No definition available.

Name:	ivt_ProvisionForReversalOfUncollectibleStraightLineRentNet
Namespace Prefix:	ivt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Provision For Uncollectible Billed Rent And Recoveries

+ References

No definition available.

+ Details

Name:	ivt_ProvisionForUncollectibleBilledRentAndRecoveries
Namespace Prefix:	ivt_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479806/606-10-50-5

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479777/606-10-55-91

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479777/606-10-55-91

Reference 4: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479777/606-10-55-91

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479777/606-10-55-91

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479777/606-10-55-91

Reference 7: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479777/606-10-55-91

Reference 8: http://www.xbrl.org/2003/role/exampleRef
-Topic 606
-SubTopic 10
-Name Accounting Standards Codification
-Section 55
-Paragraph 91
-Subparagraph (g)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479777/606-10-55-91

+ Details

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

- Definition

Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479773/842-30-50-5

+ Details

Name:	us-gaap_LeaseIncome
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount of operating lease income from lease payments paid and payable to lessor. Excludes variable lease payments not included in measurement of lease receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 270
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 6A
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482964/270-10-50-6A

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479773/842-30-50-5

+ Details

Name:	us-gaap_OperatingLeaseLeaseIncomeLeasePayments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

Name:	ivt_LeaseIncomeTypeAxis=ivt_TaxandInsuranceRecoveryIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ivt_LeaseIncomeTypeAxis=ivt_CommonAreaMaintenanceandOtherRecoveryIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ivt_LeaseIncomeTypeAxis=ivt_GroundRentIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ivt_LeaseIncomeTypeAxis=ivt_AmortizationOfMarketLeaseIntangiblesAndInducementsNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ivt_LeaseIncomeTypeAxis=ivt_ShorttermTerminationFeeandOtherLeaseIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ivt_LeaseIncomeTypeAxis=ivt_TerminationFeeIncomeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ivt_LeaseIncomeTypeAxis=ivt_StraightLineRentAdjustmentNetMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ivt_LeaseIncomeTypeAxis=ivt_ReversalOfUncollectibleBilledRentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: