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Note 8 - Financial Instruments - Other Investments, at Fair Value (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Other Investments, Fair Value Disclosure $ 56,033 $ 58,540
Corporate Bonds and Redeemable Preferred Stock [Member]    
Other Investments, Fair Value Disclosure 476 476
U.S. Insurance JV [Member]    
Other Investments, Fair Value Disclosure 3,450 1,564
SPAC Fund [Member]    
Other Investments, Fair Value Disclosure 1,980 984
Residential Mortgage [Member]    
Other Investments, Fair Value Disclosure 115 104
Equity Securities [Member]    
Other Investments, Fair Value Disclosure 24,733 17,421
Restricted Equity Securities [Member]    
Other Investments, Fair Value Disclosure 19,449 34,172
Subordinated Debt [Member]    
Other Investments, Fair Value Disclosure 0 1,519
Residential Transition Loans [Member]    
Other Investments, Fair Value Disclosure 0 2,300
CREO JV [Member]    
Other Investments, Fair Value Disclosure $ 5,830 $ 0