v3.26.1
Employee Benefit Plan, Nonparticipant-Directed Investment (Details) - EBP Third Federal 401(k) Savings Plan - USD ($)
Dec. 31, 2025
Dec. 31, 2024
EBP, Nonparticipant-Directed Investment [Abstract]    
EBP, Investment, Fair Value $ 220,977,254 $ 199,750,476
EBP, Investment, Employer, Common Stock, to Total Asset, Percentage 7.00% 7.00%
EBP, Nonparticipant-Directed Investment [Line Items]    
EBP, Investment, Fair Value $ 220,977,254 $ 199,750,476
EBP, Investment, Employer, Common Stock, to Total Asset, Percentage 7.00% 7.00%
EBP, Employer, Common Stock    
EBP, Nonparticipant-Directed Investment [Abstract]    
EBP, Investment, Fair Value $ 14,834,206 $ 14,362,161
EBP, Nonparticipant-Directed Investment [Line Items]    
EBP, Investment, Fair Value $ 14,834,206 $ 14,362,161