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Fair Value Disclosures - Level 3 Roll Forward (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Net Asset (Liability) Value [Roll Forward]        
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Net Asset (Liability) Value $ (123) $ (167) $ (186) $ (360)
Purchases/additions (297) (973)    
Increase (decrease) in value 360 1,166    
Derivative Financial Instruments, Liabilities | Credit derivatives        
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Beginning balance (186) (360)    
Additions (297) (973)    
Increase (decrease) in value 360 1,166    
Ending balance $ (123) $ (167)