Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies ProAssurance is involved in various legal actions related to insurance policies and claims handling including, but not limited to, claims asserted by policyholders. These types of legal actions arise in the Company's ordinary course of business and, in accordance with GAAP for insurance entities, are considered as a part of the Company's loss reserving process, which is described in detail under the heading "Losses and Loss Adjustment Expenses" in the Accounting Policies section in Note 1 of the Notes to Consolidated Financial Statements in ProAssurance's December 31, 2021 report on Form 10-K. ProAssurance also has other direct actions against the Company unrelated to its claims activity which are evaluated and accounted for as a part of other liabilities. For these corporate legal actions, the Company evaluates each case separately and establishes what it believes is an appropriate reserve based on GAAP guidance related to contingent liabilities. As of June 30, 2022, there were no material reserves established for corporate legal actions. As a member of Lloyd's, ProAssurance has obligations to Syndicate 1729 including a Syndicate Credit Agreement and FAL requirements. The Syndicate Credit Agreement is an unconditional revolving credit agreement to the Premium Trust Fund of Syndicate 1729 for the purpose of providing working capital. At June 30, 2022, the maximum permitted borrowings under the Syndicate Credit Agreement were approximately £30.0 million (approximately $36.5 million at June 30, 2022). Effective July 1, 2022, maximum permitted borrowings were reduced to £15.0 million (approximately $18.3 million at June 30, 2022) from £30.0 million under an amended Syndicate Credit Agreement executed in January 2022. The amended Syndicate Credit Agreement has a maturity date of June 30, 2023 and contains an annual auto-renewal feature which allows for ProAssurance to elect to non-renew if notice is given at least 30 days prior to the next auto-renewal date, which is one year prior to the maturity date. On May 23, 2022, ProAssurance provided such notice of termination of the Syndicate Credit Agreements. As a result, the Syndicate Credit Agreements will expire on June 30, 2023. Under the Syndicate Credit Agreement, advances bear interest at 3.8% annually and may be repaid at any time. As of June 30, 2022, there were no outstanding borrowings under the Syndicate Credit Agreement. ProAssurance provides FAL to support underwriting by Syndicate 1729 which is comprised of investment securities and cash and cash equivalents deposited with Lloyd's with a total fair value of approximately $30.3 million at June 30, 2022 (see Note 3). During the second quarter of 2022, ProAssurance received a return of approximately $5.5 million of cash from its FAL balances given Syndicate 6131 ceased underwriting on a quota share basis with Syndicate 1729 as Syndicate 6131's business is retained within Syndicate 1729 beginning with the 2022 underwriting year (see Note 11 for additional information). In addition, the return of FAL during the second quarter of 2022 related to the settlement of the Company's participation in the results of Syndicate 1729 and Syndicate 6131 for the 2019 underwriting year. ProAssurance has entered into financial instrument transactions that may present off-balance sheet credit risk or market risk. These transactions include a short-term loan commitment and commitments to provide funding to non-public investment entities. Under the short-term loan commitment, ProAssurance has agreed to advance funds on a 30 day basis to a counterparty provided there is no violation of any condition established in the contract. As of June 30, 2022, ProAssurance had total funding commitments related to non-public investment entities as well as the short-term loan commitment of approximately $223.7 million which included the amount at risk if the full short-term loan is extended and the counterparties default. However, the credit risk associated with the short-term loan commitment is minimal as the counterparties to the contract are highly rated commercial institutions and to-date have been performing in accordance with their contractual obligations. ProAssurance’s expected credit losses associated with this short-term loan commitment were nominal in amount as of June 30, 2022. ProAssurance has previously entered into a services agreement with a company to provide data analytics services for certain product lines within the Company's HCPL book of business. In November 2021, ProAssurance executed an amendment to this services agreement which extended the Company's commitment an additional three years for an annual fee of approximately $3.5 million. In addition, the amended services agreement contains an annual one-year auto-extension feature unless either party elects to non-renew the services agreement by providing notice at least six-months prior to the end of the contract. ProAssurance incurred operating expenses associated with this services agreement of $0.9 million and $1.8 million for the three and six months ended June 30, 2022, respectively, as compared to $0.6 million and $1.2 million for the same respective periods of 2021. As of June 30, 2022, the remaining commitment under this agreement was estimated to be approximately $8.1 million. The purchase consideration in the NORCAL acquisition included contingent consideration. NORCAL policyholders who elected to receive NORCAL stock and tender it to ProAssurance are eligible for a share of contingent consideration in an amount of up to approximately $84 million depending upon the after-tax development of NORCAL's ultimate net losses between December 31, 2020 and December 31, 2023. The estimated fair value of this contingent consideration was $24 million as of June 30, 2022, which is unchanged from the acquisition date of May 5, 2021, and was derived utilizing a stochastic model. This estimate does not guarantee that contingent consideration will ultimately be paid. Depending on NORCAL's actual ultimate net loss development between December 31, 2020 and December 31, 2023, the actual amount due to eligible policyholders may be greater than or less than the $24 million current fair value estimate. See further discussion around the contingent consideration in Note 2 and further discussion on the NORCAL acquisition in Note 2 of the Notes to Consolidated Financial Statements included in ProAssurance's December 31, 2021 report on Form 10-K.