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Note 6 - Other Long-term Debt (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Feb. 01, 2027
Jul. 01, 2025
Dec. 31, 2022
Mar. 31, 2026
Mar. 31, 2024
Dec. 31, 2025
Sep. 30, 2025
Jan. 31, 2022
Jun. 30, 2020
Sep. 30, 2005
Debt Instrument, Face Amount       $ 45,155,000   $ 45,155,000        
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]       Secured Overnight Financing Rate (SOFR) [Member] Secured Overnight Financing Rate (SOFR) [Member] Secured Overnight Financing Rate (SOFR) [Member]        
First Tennessee Bank, N.A. [Member]                    
Temporary Equity, Liquidation Preference                   $ 5,155,000
Trust Preferred Securities, Maximum Dividend Deferring Period (Year)       5 years            
Eagle Bancorp Statutory Trust I [Member] | Subordinated Debt [Member]                    
Debt Instrument, Interest Rate, Stated Percentage                   6.02%
Eagle Bancorp Statutory Trust I [Member] | Variable Interest Rate Subordinated Debentures Due in 2035 [Member]                    
Debt Instrument, Basis Spread on Variable Rate     1.42%   1.68%          
Debt Instrument, Interest Rate, Effective Percentage       5.36%   5.33%        
3.50% Subordinated Notes Due in 2032 [Member]                    
Debt Instrument, Face Amount       $ 40,000,000   $ 40,000,000   $ 40,000,000    
Debt Instrument, Interest Rate, Stated Percentage       3.50%   3.50%   3.50%    
3.50% Subordinated Notes Due in 2032 [Member] | Forecast [Member]                    
Debt Instrument, Basis Spread on Variable Rate 2.18%                  
5.50% Subordinated Notes Due in 2030 [Member]                    
Debt Instrument, Face Amount                 $ 15,000,000  
Debt Instrument, Interest Rate, Stated Percentage                 5.50%  
Debt Instrument, Basis Spread on Variable Rate   5.09%   0.50%            
Debt Instrument, Interest Rate, Floating Rate             9.39%      
Debt Instrument, Interest Rate, Effective Percentage       6.25%   6.25%        
Eagle Bancorp Statutory Trust I [Member]                    
Subordinated Debt, Ending Balance                   $ 5,155,000