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Financial Instruments - Summary of Investments (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Debt Securities, Available for Sale [Roll Forward]
Fair value at beginning of period	$ 38,670	$ 25,708
Purchases	18,271	26,980
Redemptions	(4,235)	(6,530)
Maturities	(4,270)	(8,347)
Change in bond premium	(181)	1,517
Fair market value adjustment	(1,590)	(658)
Fair value at end of period	$ 46,665	$ 38,670

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