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Investments - Narrative (Details) - USD ($)
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Investments    
Accretion (amortization) of premiums and discounts on investments $ 0 $ 339,000
Other income, net 2,777,000 1,273,000
Allowance for credit loss 0 0
Accrued interest receivable 0  
Reclassification out of Accumulated Other Comprehensive Income    
Investments    
Other income, net 0 0
Other Nonoperating Income (Expense)    
Investments    
Interest income on investments 2,400,000 900,000
Accretion (amortization) of premiums and discounts on investments $ 0 $ (300,000)