Annual report pursuant to Section 13 and 15(d)

LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Narratives) (Details)

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LOANS HELD FOR INVESTMENT AND ALLOWANCE FOR CREDIT LOSSES (Narratives) (Details) - USD ($)
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Loans Held for Investment and Allowance for Credit Losses [Abstract]        
Accrued interest receivable $ 10,100,000 $ 8,000,000.0    
Real estate loans for which formal foreclosure proceedings were in process 500,000 600,000    
TDRs 0      
Financing Receivable, Allowance for Credit Loss 29,941,000 25,068,000 $ 21,606,000 $ 23,816,000
Increase (decrease) in allowance 4,900,000 3,500,000    
Provision For Loan Losses Expensed 9,595,000 7,397,000 (2,842,000)  
Net loan charge-offs or (recoveries) 4,722,000 3,935,000 $ (632,000)  
Net deferred costs 7,800,000 5,100,000    
Capital City Home Loans [Member]        
Payments to purchase mortgage loans held for sale $ 364,800,000 421,700,000    
Third Party [Member]        
Purchase of real estate secured adjustable rate loans   $ 15,000,000.0