Lessor, Direct Financing Lease, Number

No definition available.

Name:	pstl_LessorDirectFinancingLeaseNumber
Namespace Prefix:	pstl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Lessor, Operating Lease, Lessee Option To Purchase Underlying Asset, Aggregate Carrying Value

+ References

No definition available.

+ Details

Name:	pstl_LessorOperatingLeaseLesseeOptionToPurchaseUnderlyingAssetAggregateCarryingValue
Namespace Prefix:	pstl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lessor, Operating Lease, Lessee Option To Purchase Underlying Asset, Number

+ References

No definition available.

+ Details

Name:	pstl_LessorOperatingLeaseLesseeOptionToPurchaseUnderlyingAssetNumber
Namespace Prefix:	pstl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Lessor, Operating Lease, Lessee Option To Purchase Underlying Asset, Number Purchase Price Greater Than Value Of Underlying Asset

+ References

No definition available.

+ Details

Name:	pstl_LessorOperatingLeaseLesseeOptionToPurchaseUnderlyingAssetNumberPurchasePriceGreaterThanValueOfUnderlyingAsset
Namespace Prefix:	pstl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Lessor, Operating Lease, Lessee Option To Purchase Underlying Asset, Number Purchase Price Less Than Or Equal To Underlying Asset

+ References

No definition available.

+ Details

Name:	pstl_LessorOperatingLeaseLesseeOptionToPurchaseUnderlyingAssetNumberPurchasePriceLessThanOrEqualToUnderlyingAsset
Namespace Prefix:	pstl_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

- Definition

Lessor, Operating Lease, Lessee Option To Purchase Underlying Asset, Purchase Price Greater Than Value Of Underlying Assets, Aggregate Purchase Price

+ References

No definition available.

+ Details

Name:	pstl_LessorOperatingLeaseLesseeOptionToPurchaseUnderlyingAssetPurchasePriceGreaterThanValueOfUnderlyingAssetsAggregatePurchasePrice
Namespace Prefix:	pstl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Lessor, Operating Lease, Lessee Option To Purchase Underlying Assets, Number Purchase Price Less Than Or Equal To Underlying Asset, Consideration

+ References

No definition available.

+ Details

Name:	pstl_LessorOperatingLeaseLesseeOptionToPurchaseUnderlyingAssetsNumberPurchasePriceLessThanOrEqualToUnderlyingAssetConsideration
Namespace Prefix:	pstl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of direct financing lease revenue.

+ 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 (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479773/842-30-50-5

+ Details

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

- Definition

Remaining lease term of operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 7A
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-7A

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-3

+ Details

Name:	us-gaap_LesseeOperatingLeaseRemainingLeaseTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount of operating lease expense. Excludes sublease income.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 4
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479041/842-20-45-4

+ Details

Name:	us-gaap_OperatingLeaseExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Weighted average discount rate for operating lease calculated at point in time.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479589/842-20-55-53

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (g)(4)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-4

+ Details

Name:	us-gaap_OperatingLeaseWeightedAverageDiscountRatePercent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 53
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479589/842-20-55-53

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (g)(3)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478964/842-20-50-4

+ Details

Name:	us-gaap_OperatingLeaseWeightedAverageRemainingLeaseTerm1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

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

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Leases - Narrative (Details) $ in Thousands	3 Months Ended		6 Months Ended
Leases - Narrative (Details) $ in Thousands	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 lease	Jun. 30, 2025 property	Jun. 30, 2025 USD ($)	Jun. 30, 2025	Dec. 31, 2024 property
Operating Leased Assets [Line Items]
Number of postal properties subject to direct financing leases (in properties)					2	2			2
Number of operating leases (in properties) \| property						90
Number of leases acquired with purchase price greater than value of underlying asset (in properties) \| property						87
Aggregate carrying value							$ 66,000
Aggregate purchase price							85,400
Number of operating leases not acquired (in properties) \| property						3
Purchase price for postal properties							$ 2,900
Direct financing lease revenue	$ 300	$ 300	$ 500	$ 500
Weighted average remaining lease term	18 years 6 months		18 years 6 months
Operating lease expense	$ 90	$ 70	$ 200	$ 100
Minimum
Operating Leased Assets [Line Items]
Remaining lease term	1 month 6 days		1 month 6 days
Weighted average discount rate								4.25%
Maximum
Operating Leased Assets [Line Items]
Remaining lease term	57 years 6 months		57 years 6 months
Weighted average discount rate								7.35%