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Investments - Schedule of Net Gains and Losses on Equity Securities (Details)
$ in Thousands
12 Months Ended
Dec. 31, 2019
USD ($)
Business Combinations [Abstract]  
Net gains and losses recognized during the period on equity securities $ (7,443)
Less: Net gains and losses realized during the period on equity securities 0
Unrealized net gains recognized during the period on equity securities still held at the reporting date $ (7,443)