8. Other Income and Expenses (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Interest and investment income	$ 8,000	$ 300	$ 45,700	$ 18,700
Net realized (gain) loss on investments	200	0	600	(100)
Equity Method Investment, Other than Temporary Impairment	0	0	0	800
Financing Receivable, Allowance for Credit Loss, Current	5,100		5,100
Allowance for Credit Loss, Receivable, Other, Current		0		0
Increase (Decrease) in Deposit Assets	0	0	(1,400)	0
Other Nonoperating (Income)	(400)		(1,000)
Other Nonoperating Expense		300		1,300
Other (income) expense, net	$ (3,062)	$ 579	$ (42,369)	$ (16,732)

Amount of allowance for credit loss of accounts and financing receivables. Includes, but is not limited to, notes and loan receivable.

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