Quarterly report pursuant to Section 13 or 15(d)

Note 11 - Fair Value Measurement (Details Textual)

v3.22.1
Note 11 - Fair Value Measurement (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Asset Impairment Charges, Total $ 3,000,000.0 $ 2,000,000.0  
Real Estate Owned, Amount of Loss at Acquisition 6,000 432,000  
SEC Schedule, 12-29, Real Estate Companies, Investment in Mortgage Loans on Real Estate, Foreclosure 182,000   $ 50,000
Mortgage Loans in Process of Foreclosure, Amount 1,100,000   299,000
Liabilities, Total 14,166,444,000   $ 14,296,791,000 [1]
Fair Value, Nonrecurring [Member]      
Liabilities, Total 0 0  
Fair Value, Recurring [Member]      
Liabilities, Total $ 0 $ 0  
Minimum [Member]      
Impaired Loans, Fair Value Adjustment, Percent 0.00%   0.00%
Real Estate Owned, Fair Value Adjustment, Percent 10.00%   0.00%
Maximum [Member]      
Impaired Loans, Fair Value Adjustment, Percent 75.00%   75.00%
Real Estate Owned, Fair Value Adjustment, Percent 66.00%   100.00%
Weighted Average [Member]      
Impaired Loans, Fair Value Adjustment, Percent 23.30%   24.10%
Real Estate Owned, Fair Value Adjustment, Percent 42.70%   40.60%
[1] derived from audited financial statements.