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Fair Value Disclosure (Schedule of Assets and Liabilities) (Details) - Fair Value Measurements, Recurring - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Quoted Prices in Active Markets for Identical Assets (Level 1)    
Assets:    
Equity securities $ 17,987 $ 17,208
Total assets accounted for at fair value on a recurring basis 17,987 17,208
Significant Other Observable Inputs (Level 2)    
Assets:    
Equity securities 0 0
Total assets accounted for at fair value on a recurring basis 0 0
Significant Unobservable Inputs (Level 3)    
Assets:    
Equity securities 0 0
Total assets accounted for at fair value on a recurring basis 0 0
Estimate of Fair Value Measurement    
Assets:    
Equity securities 17,987 17,208
Total assets accounted for at fair value on a recurring basis $ 17,987 $ 17,208