XML 80 R67.htm IDEA: XBRL DOCUMENT
v3.21.2

Commitments and Contingencies (Details) | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2021 USD ($) | Sep. 30, 2021 USD ($) | Sep. 30, 2021 GBP (£) | May 05, 2021 USD ($) | Dec. 31, 2020 USD ($) | Sep. 30, 2020 USD ($)
Other Commitments [Line Items] |  |  |  |  |  |
Contingent consideration |  | $ 24,000,000 |  |  | $ 0 | $ 0
NORCAL Group |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |
Contingent consideration, maximum estimate |  |  |  | $ 84,000,000 |  |
Contingent consideration |  | 24,000,000 |  | $ 24,000,000 |  |
Funding Commitments |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |
Commitments total |  | 221,600,000 |  |  |  |
Lloyd's Syndicates |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |
Current lending capacity under revolving credit agreement | £ |  |  | £ 30,000,000 |  |  |
Unused commitments to extend credit |  | $ 40,400,000 |  |  |  |
Non-renew notice, period |  | 30 days |  |  |  |
Auto-renewal period prior to maturity date |  | 1 year |  |  |  |
Interest rate on revolving credit agreement (percent) |  | 3.80% | 3.80% |  |  |
Outstanding borrowings |  | $ 0 |  |  |  |
Required FAL deposit |  | $ 72,500,000 |  |  |  |
Syndicate 1729 |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |
Return of deposit assets | $ 24,500,000 |  |  |  |  |
Proportion of capital provided to support Lloyd's Syndicate |  | 5.00% | 5.00% |  | 29.00% |
Syndicate 6131 |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |
Proportion of capital provided to support Lloyd's Syndicate |  | 50.00% | 50.00% |  | 100.00% |

X
- Definition This item represents the capital provided in support of a segment by a corporate member as a percentage of total capital provided by all members to support the segment. + References No definition available. + Details
Name: | pra_ProportionOfCapitalProvidedToSupportSegment
Namespace Prefix: | pra_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Purchase Commitment, Notice For Optional Extension, Period + References No definition available. + Details
Name: | pra_PurchaseCommitmentNoticeForOptionalExtensionPeriod
Namespace Prefix: | pra_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Return Of Deposit Assets + References No definition available. + Details
Name: | pra_ReturnOfDepositAssets
Namespace Prefix: | pra_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Syndicate Credit Agreement, Auto-Renewal, Period + References No definition available. + Details
Name: | pra_SyndicateCreditAgreementAutoRenewalPeriod
Namespace Prefix: | pra_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of current lending capacity under the Syndicate credit agreement without considering any amounts currently outstanding under the facility. + References No definition available. + Details
Name: | pra_SyndicateCreditAgreementCurrentLendingCapacity
Namespace Prefix: | pra_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Syndicate Credit Agreement, Interest Rate on Lendings + References No definition available. + Details
Name: | pra_SyndicateCreditAgreementInterestRate
Namespace Prefix: | pra_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Syndicate Credit Agreement, Outstanding Borrowings + References No definition available. + Details
Name: | pra_SyndicateCreditAgreementOutstandingBorrowings
Namespace Prefix: | pra_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationArrangementsRangeOfOutcomesValueHigh
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of liability recognized arising from contingent consideration in a business combination. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 35 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116859824&loc=d3e6819-128478 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6911189&loc=d3e6408-128476 + Details
Name: | us-gaap_BusinessCombinationContingentConsiderationLiability
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The carrying amount of the asset transferred to a third party to serve as a deposit, which typically serves as security against failure by the transferor to perform under terms of an agreement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.8,17) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_DepositAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
Name: | us-gaap_OtherCommitment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Definition Unused amount of commitments to extend credit to customers. + References No definition available. + Details
Name: | us-gaap_UnusedCommitmentsToExtendCredit
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_BusinessAcquisitionAxis=pra_NORCALGroupMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=pra_FundingCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=pra_LloydsSyndicatesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=pra_Syndicate1729Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=pra_Syndicate6131Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |