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Financial Instruments - Summary of Investments (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2023
Dec. 31, 2022
Debt Securities, Available for Sale [Roll Forward]    
Fair value at beginning of period $ 43,485 $ 38,670
Purchases 0 19,771
Redemptions 0 (5,630)
Maturities (500) (6,770)
Change in bond premium (91) (645)
Fair market value adjustment 250 (1,911)
Fair value at end of period $ 43,144 $ 43,485