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Leases - Additional Information (Details) | 6 Months Ended
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Jun. 30, 2024 USD ($)
Lessee Lease Description [Line Items] |
Lease option to extend | five years
Lease existence of option to extend | true
Lease option to terminate | third year
Lease existence of option to terminate | true
Operating lease not yet commenced expense | $ 0
Minimum |
Lessee Lease Description [Line Items] |
Lease term of contract | 1 year
Maximum |
Lessee Lease Description [Line Items] |
Lease term of contract | 8 years

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- Definition Lessee lease existence of option to extend. + References No definition available. + Details
Name: | psn_LesseeLeaseExistenceOfOptionToExtend
Namespace Prefix: | psn_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

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- Definition Lessee lease existence of option to terminate. + References No definition available. + Details
Name: | psn_LesseeLeaseExistenceOfOptionToTerminate
Namespace Prefix: | psn_
Data Type: | xbrli:booleanItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lessee lease option to extend. + References No definition available. + Details
Name: | psn_LesseeLeaseOptionToExtend
Namespace Prefix: | psn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Lessee lease option to terminate. + References No definition available. + Details
Name: | psn_LesseeLeaseOptionToTerminate
Namespace Prefix: | psn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Lessee lease term of contract. + References No definition available. + Details
Name: | psn_LesseeLeaseTermOfContract
Namespace Prefix: | psn_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Operating lease not yet commenced expense. + References No definition available. + Details
Name: | psn_OperatingLeaseNotYetCommencedExpense
Namespace Prefix: | psn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- 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 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-3 + Details
Name: | us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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