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Note 12 - Borrowings and Financing Activities - FHLB Advances (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
FHLB advances $ 172,649 $ 176,483
Federal Home Loan Bank, Advances, Maturity Period, Fixed Rate 90 days  
FHLB Advances    
FHLB advances $ 172,649 176,483
Federal Home Loan Bank, Advances, Weighted Average Interest Rate 0.87%  
Minimum | FHLB Advances    
Federal Home Loan Bank, Ratio of Market Value of Collateral to Advances 1.03  
Maximum | FHLB Advances    
Federal Home Loan Bank, Ratio of Market Value of Collateral to Advances 1.14  
Fixed maturities AFS and trading securities | Debt securities    
Federal Home Loan Bank, Advances, General Debt Obligations, Disclosures, Collateral Pledged $ 199,500 $ 188,000