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Note 5 - Mortgage Servicing Rights - Schedule of Sensitivity Analysis of Fair Value (Details) - Mortgage Servicing Rights [Member] - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Aggregate portfolio principal balance $ 1,630,000 $ 2,830,000
Conditional prepayment rate (“CPR”) 8.30% 7.20%
Fair value MSRs $ 21,000 $ 38,200
Weighted average discount rate 10.20% 9.40%
Base Rate [Member]    
Aggregate portfolio principal balance $ 1,632,141 $ 2,832,016
Weighted average rate of loans in MSRs portfolio 4.20% 3.60%
Base Rate [Member] | Measurement Input, Prepayment Rate [Member]    
Conditional prepayment rate (“CPR”) 8.30% 7.20%
Fair value MSRs $ 21,043 $ 38,163
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of Other than 10 or 20 Percent Adverse Change in Other Assumption, Percent 1.20% 1.30%
Base Rate [Member] | Measurement Input, Discount Rate [Member]    
Fair value MSRs $ 21,043 $ 38,163
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of Other than 10 or 20 Percent Adverse Change in Other Assumption, Percent 1.30% 1.30%
Weighted average discount rate 10.20% 9.40%
Sensitivity Analysis of Fair Value, Impact of 0.5 Percent Adverse Change in Other Assumption [Member] | Measurement Input, Prepayment Rate [Member]    
Conditional prepayment rate (“CPR”) 10.10% 8.00%
Fair value MSRs $ 20,127 $ 37,268
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of Other than 10 or 20 Percent Adverse Change in Other Assumption, Percent 1.20% 1.30%
Sensitivity Analysis of Fair Value, Impact of 0.5 Percent Adverse Change in Other Assumption [Member] | Measurement Input, Discount Rate [Member]    
Fair value MSRs $ 20,587 $ 37,301
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of Other than 10 or 20 Percent Adverse Change in Other Assumption, Percent 1.30% 1.30%
Weighted average discount rate 10.70% 9.90%
Sensitivity Analysis of Fair Value, Impact of 1.0 Percent Adverse Change in Other Assumption [Member] | Measurement Input, Prepayment Rate [Member]    
Conditional prepayment rate (“CPR”) 12.70% 9.30%
Fair value MSRs $ 19,067 $ 35,819
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of Other than 10 or 20 Percent Adverse Change in Other Assumption, Percent 1.10% 1.30%
Sensitivity Analysis of Fair Value, Impact of 1.0 Percent Adverse Change in Other Assumption [Member] | Measurement Input, Discount Rate [Member]    
Fair value MSRs $ 20,149 $ 36,476
Sensitivity Analysis of Fair Value, Transferor's Interests in Transferred Financial Assets, Impact of Other than 10 or 20 Percent Adverse Change in Other Assumption, Percent 1.20% 1.30%
Weighted average discount rate 11.20% 10.40%