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Financial Instruments - Summary of Investments (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2022
Dec. 31, 2021
Debt Securities, Available for Sale [Roll Forward]    
Fair value at beginning of period $ 38,670 $ 25,708
Purchases 19,771 26,980
Redemptions (5,630) (6,530)
Maturities (5,870) (8,347)
Change in bond premium (350) 1,517
Fair market value adjustment (2,218) (658)
Fair value at end of period $ 44,373 $ 38,670