Description of Business and Basis of Presentation - Additional Information (Details) - USD ($) $ in Millions	Apr. 03, 2020	Mar. 31, 2020
Pacific Valley Insurance Company, Inc. \| Clarendon National Insurance Company
Description Of Business And Basis Of Presentation
Transfer of reinsurance obligations	$ 465.0	$ 465.0

Line items representing description of business and basis of presentation .

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