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Investments (Narrative) (Details)	3 Months Ended		12 Months Ended
	Mar. 31, 2023 USD ($) shares	Mar. 31, 2022 USD ($) investment	Dec. 31, 2022 USD ($) investment shares	Apr. 12, 2022 USD ($)
Debt Securities, Available-for-sale [Line Items]
Shares held | shares	1,000,000		1,100,000
Investment in corporate debt securities	$ 35,300,000		$ 58,400,000
Gross unrealized gains	1,000,000		$ 600,000
Investments in an unrealized loss position | investment		0	0
Impairment losses	0		$ 0
Loss from equity method investment, net	(9,182,000)	$ (785,000)
Management fees recognized	0	800,000
Equity method investments	100,000,000		112,300,000
OCV Management, LLC
Debt Securities, Available-for-sale [Line Items]
Maximum exposure of investment	100,000,000		112,300,000
Distribution from equity method investment	0	$ 0
Corporate Debt Securities
Debt Securities, Available-for-sale [Line Items]
Debt securities, available-for-sale, coupon rate				4.00%
Debt securities, available-for-sale				$ 15,000,000
Carrying value of investment	16,000,000		15,600,000
Maximum exposure of investment	$ 16,000,000		$ 15,600,000
Public Stock Offering
Debt Securities, Available-for-sale [Line Items]
Shares issued in offering (in shares) | shares	52,393

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