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Fair Value - Change in Carrying Value of Level 3 Financial Instruments (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Fair value measurement Level 3 reconciliation [Abstract]    
Balance as of beginning of period $ 126 $ 125
Purchases 0 0
Sales 0 0
Realized gains (losses), net 0 0
Unrealized (losses), net (7) (1)
Balance as of end of period $ 119 $ 124