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10. Other Income and Expenses (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Interest and investment income $ (58,000) $ (18,900) $ (18,200)
Realized Investment Gains (Losses) (2,300) (8,000) (1,000)
Equity Method Investment, Other than Temporary Impairment 11,900 800 4,600
Financing Receivable, Allowance for Credit Loss, Writeoff 7,500 0 0
Gain on divestiture of division (1,400) 0 (11,700)
Other Nonoperating Income (2,300) (700)  
Other Expense     1,800
Other Nonoperating Income (Expense) $ (44,574) $ (26,775) $ (24,488)