Quarterly report [Sections 13 or 15(d)]

Note 12 - Fair Value Measurement (Details Textual)

v3.26.3
Note 12 - Fair Value Measurement (Details Textual)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Sep. 30, 2026
USD ($)
Sep. 30, 2025
USD ($)
Dec. 31, 2025
USD ($)
Asset, Impairment Loss $ 17,400,000 $ 10,400,000 $ 36,600,000 $ 14,000,000  
Gains (Losses) on Sales of Other Real Estate $ (298,000) $ (3,000) $ (381,000) $ 298,000  
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Number of Loans     2   5
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Foreclosure     $ 6,300,000   $ 2,500,000
Number of Mortgage Loans in Process of Foreclosure 5   5   1
Mortgage Loans in Process of Foreclosure, Amount $ 1,800,000   $ 1,800,000   $ 171,000
Liabilities 16,282,344,000   $ 16,282,344,000   15,876,843,000
Fair Value, Number of Transfers Between Levels     0    
Fair Value, Recurring [Member]          
Liabilities $ 0   $ 0   $ 0
Minimum [Member]          
Impaired Loans, Fair Value Adjustment, Percent 0.00%   0.00%   0.00%
Real Estate Owned, Fair Value Adjustment, Percent 10.00%   10.00%   10.00%
Maximum [Member]          
Impaired Loans, Fair Value Adjustment, Percent 80.00%   80.00%   70.00%
Real Estate Owned, Fair Value Adjustment, Percent 37.00%   37.00%   27.00%
Weighted Average [Member]          
Impaired Loans, Fair Value Adjustment, Percent 26.20%   26.20%   17.10%
Real Estate Owned, Fair Value Adjustment, Percent 20.00%   20.00%   23.50%