Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Summary of Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis and Realized and Unrealized Gains (Losses) (Details)

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Fair Value Measurements - Summary of Changes in Level 3 Assets and Liabilities Measured at Fair Value on Recurring Basis and Realized and Unrealized Gains (Losses) (Details) - Level 3 - Preference Shares - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Net Realized and Unrealized (Gains) Losses Included in Income $ (2,486) $ 315
Recurring Basis    
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis Valuation Techniques [Line Items]    
Fair Value Beginning of Period 2,530  
Net Realized and Unrealized (Gains) Losses Included in Income (2,486)  
Other Comprehensive (Income) Loss (42)  
Fair Value End of Period $ 2