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v3.22.4

Commitments and Contingencies - Trust Account (Details) $ in Millions | Dec. 31, 2022 USD ($)
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Commitments and Contingencies |
Trust, par value | $ 37.2

X
- Definition Trust, Par Value + References No definition available. + Details
Name: | plmr_TrustParValue
Namespace Prefix: | plmr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration