Basis of Presentation	6 Months Ended
Basis of Presentation	Jun. 30, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited Condensed Consolidated Financial Statements include the accounts of ProAssurance Corporation, its wholly owned subsidiaries and VIEs in which ProAssurance is the primary beneficiary (ProAssurance, PRA or the Company). See Note 9 for more information on ProAssurance's VIE interests. The financial statements have been prepared in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and notes required by GAAP for complete financial statements. In the opinion of management, all adjustments considered necessary for a fair presentation, consisting of normal recurring adjustments, have been included. ProAssurance’s results for the six months ended June 30, 2022 are not necessarily indicative of the results that may be expected for the year ending December 31, 2022. The accompanying Condensed Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and Notes contained in ProAssurance’s December 31, 2021 report on Form 10-K. ProAssurance operates in five reportable segments as follows: Specialty P&C, Workers' Compensation Insurance, Segregated Portfolio Cell Reinsurance, Lloyd's Syndicates and Corporate. For more information on the Company's segment reporting, including the nature of products and services provided and financial information by segment, refer to Note 11. Beginning in 2022, ProAssurance revised its process for estimating ULAE as a result of substantially integrating NORCAL into the Specialty P&C segment operations. ULAE are costs that cannot be attributed to processing a specific claim and are allocated to net losses and loss adjustment expenses on the Condensed Consolidated Statement of Income and Comprehensive Income. ProAssurance accounted for this change prospectively as a change in accounting estimate. Changes in accounting estimate are reflected prospectively beginning in the period the change in estimate occurs. For the three and six months ended June 30, 2022, the change in the Company's estimate of ULAE resulted in an increase of $6.3 million and $13.6 million to underwriting, policy acquisition and operating expenses, respectively, with an offsetting decrease of $6.3 million and $13.6 million to net losses and loss adjustment expenses, respectively, when compared to amounts that would have been estimated as ULAE under the Company's previous methodology. There was no impact on total expenses or net income (loss) in the Company's Condensed Consolidated Statement of Income and Comprehensive Income for the three and six months ended June 30, 2022 as a result of this change in the estimate. Accounting Policies The preparation of financial statements in conformity with GAAP requires the Company to make estimates and assumptions that affect the reported amounts of assets and liabilities, revenues and expenses, and disclosures related to these amounts at the date of the financial statements. The Company evaluates these estimates and assumptions on an ongoing basis based on current and historical developments, market conditions, industry trends and other information that the Company believes to be reasonable under the circumstances, including the potential impacts of the COVID-19 pandemic (see "Item 1A, Risk Factors" in ProAssurance's December 31, 2021 report on Form 10-K for additional information). The Company can make no assurance that actual results will conform to its estimates and assumptions; reported results of operations may be materially affected by changes in these estimates and assumptions. The significant accounting policies followed by ProAssurance in making estimates that materially affect financial reporting are summarized in Note 1 of the Notes to Consolidated Financial Statements in ProAssurance’s December 31, 2021 report on Form 10-K. Accounting Changes Adopted ProAssurance has not adopted any accounting changes during the six months ended June 30, 2022 that had a material effect on its results of operations, financial position or cash flows. Accounting Changes Not Yet Adopted ProAssurance is not aware of any accounting changes not yet adopted as of June 30, 2022 that could have a material impact on its results of operations, financial position or cash flows.