Percentage fee charged by a bank for setting up a loan.

No definition available.

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Namespace Prefix:	pshg_
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Balance Type:	na
Period Type:	duration

- Definition

The number of balloon installment payments to be paid under the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	pshg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Face amount of financial liability at time of sale and leaseback agreement.

+ References

No definition available.

+ Details

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Namespace Prefix:	pshg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the frequency of periodic payments (monthly, quarterly, annual).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22))
-SubTopic 10
-Topic 210
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477734/942-470-50-3

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Latest date the outstanding debt instruments are required to be repaid, in YYYY-MM-DD format.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(22)(a)(2))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

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

- Definition

Earliest date the outstanding debt instruments are required to be repaid, in YYYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DebtInstrumentMaturityDateRangeStart1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Indicates type of variable interest rate on debt instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 942
-SubTopic 470
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147477734/942-470-50-3

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	enum2:enumerationSetItemType
Balance Type:	na
Period Type:	duration

- References

No definition available.

+ Details

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

- Definition

Lease term for sale and leaseback transaction, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 842
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479741/842-40-50-2

+ Details

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

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=pshg_Hull1515Member
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Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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Period Type:

- Details

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- Details

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Long-Term Debt and Bonds, Sale and Lease-Back Financing (Details) - Sale and Lease-Back Financing [Member] $ in Thousands	6 Months Ended
	Jun. 30, 2026 Installment	Jan. 13, 2026 USD ($)	Sep. 01, 2025 USD ($)	Jul. 29, 2025 USD ($)
Hull 1515/ P. Massport [Member]
Long-Term Debt and Bonds [Abstract]
Bareboat financing amount				$ 44,250
Hull 1596/ P. Tokyo [Member]
Long-Term Debt and Bonds [Abstract]
Bareboat financing amount			$ 45,392
Hull 1597/ P. Marseille [Member]
Long-Term Debt and Bonds [Abstract]
Bareboat financing amount		$ 45,000
Hulls H1515, H1596 and H1597 [Member]
Long-Term Debt and Bonds [Abstract]
Frequency of loan repayments	monthly
Number of balloon installment payments \| Installment	1
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]	Secured Overnight Financing Rate (SOFR) [Member]
Debt Instrument, maturity date range, start	Jun. 30, 2033
Debt Instrument, maturity date range, end	Aug. 31, 2035
Hulls H1515, H1596 and H1597 [Member] \| Minimum [Member]
Long-Term Debt and Bonds [Abstract]
Term of charter	8 years
Margin on variable rate	2.05%
Arrangement fee percentage	0.80%
Hulls H1515, H1596 and H1597 [Member] \| Maximum [Member]
Long-Term Debt and Bonds [Abstract]
Term of charter	10 years
Margin on variable rate	2.425%
Arrangement fee percentage	1.60%