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Note 7 - Financial Instruments - Other Investments, at Fair Value (Details) - USD ($)
$ in Thousands
Jun. 30, 2024
Dec. 31, 2023
Other Investments, Fair Value Disclosure $ 40,331 $ 72,217
Restricted Equity Securities [Member]    
Other Investments, Fair Value Disclosure 10,893 2,054
Corporate Bonds and Redeemable Preferred Stock [Member]    
Other Investments, Fair Value Disclosure 519 506
CREO JV [Member]    
Other Investments, Fair Value Disclosure 5,086 4,783
U.S. Insurance JV [Member]    
Other Investments, Fair Value Disclosure 2,851 3,107
Residential Mortgage [Member]    
Other Investments, Fair Value Disclosure 284 132
Equity Securities [Member]    
Other Investments, Fair Value Disclosure 8,372 38,038
Equity Derivatives [Member]    
Other Investments, Fair Value Disclosure 876 1,447
Fair Value Receivables [Member]    
Other Investments, Fair Value Disclosure 8,821 9,541
Interest In SPVs [Member]    
Other Investments, Fair Value Disclosure $ 2,629 $ 12,609