XML 96 R82.htm IDEA: XBRL DOCUMENT
v3.22.4

Reinsurance - Ceded Written Premiums (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Reinsurance Retention [Line Items] |  |  |
Ceded written premiums | $ 524,575 | $ 223,443 | $ 155,102
Ceded Written Premiums [Member] |  |  |
Reinsurance Retention [Line Items] |  |  |
Ceded written premiums | 365,193 | 96,001 | 59,276
Fronting premium | Ceded Written Premiums [Member] |  |  |
Reinsurance Retention [Line Items] |  |  |
Ceded written premiums | 237,285 | 11,001 |
Inland Marine | Ceded Written Premiums [Member] |  |  |
Reinsurance Retention [Line Items] |  |  |
Ceded written premiums | 63,627 | 28,389 | 5,339
Specialty Homeowners | Ceded Written Premiums [Member] |  |  |
Reinsurance Retention [Line Items] |  |  |
Ceded written premiums | 4,946 | 27,394 | 22,295
Commercial Earthquake | Ceded Written Premiums [Member] |  |  |
Reinsurance Retention [Line Items] |  |  |
Ceded written premiums | 20,467 | 14,447 | 6,929
Commercial All Risk | Ceded Written Premiums [Member] |  |  |
Reinsurance Retention [Line Items] |  |  |
Ceded written premiums | 6,260 | 3,948 | 19,218
Others | Ceded Written Premiums [Member] |  |  |
Reinsurance Retention [Line Items] |  |  |
Ceded written premiums | $ 32,609 | $ 10,822 | $ 5,495

X
- Definition Amount of written premiums ceded to other entities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI https://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 605 -Section 50 -Paragraph 1 -Subparagraph (c)(2) -URI https://asc.fasb.org/extlink&oid=6486672&loc=d3e27261-158547 + Details
Name: | us-gaap_CededPremiumsWritten
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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

X
- Details
Name: | srt_CounterpartyNameAxis=plmr_CededWrittenPremiumsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=plmr_FrontingPremiumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=plmr_InlandMarineMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=plmr_SpecialtyHomeownersMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=plmr_CommercialEarthquakeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=plmr_CommercialAllRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=us-gaap_ServiceOtherMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |