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Investments In Securities and Fair Value (Schedule of Cost-method Investments) (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Fair​Value​Assets​Measured​On​Nonrecurring​Basis​Reconciliation​Calculation​Roll​Forward [Line Items]    
Equity investments in unconsolidated affiliates, measurement alternative $ 8,202 $ 9,300
Notes receivable, fair value disclosure 641 2,201
Other assets, fair value disclosure 8,843 11,501
Level 1    
Fair​Value​Assets​Measured​On​Nonrecurring​Basis​Reconciliation​Calculation​Roll​Forward [Line Items]    
Equity investments in unconsolidated affiliates, measurement alternative 0 0
Notes receivable, fair value disclosure 0 0
Other assets, fair value disclosure 0 0
Level 2    
Fair​Value​Assets​Measured​On​Nonrecurring​Basis​Reconciliation​Calculation​Roll​Forward [Line Items]    
Equity investments in unconsolidated affiliates, measurement alternative 0 0
Notes receivable, fair value disclosure 0 0
Other assets, fair value disclosure 0 0
Level 3    
Fair​Value​Assets​Measured​On​Nonrecurring​Basis​Reconciliation​Calculation​Roll​Forward [Line Items]    
Equity investments in unconsolidated affiliates, measurement alternative 8,202 9,300
Notes receivable, fair value disclosure 641 2,201
Other assets, fair value disclosure $ 8,843 $ 11,501