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)
 12 Months Ended
Dec. 31, 2022
USD ($)
LoanContracts
Dec. 31, 2021
USD ($)
LoanContracts
Dec. 31, 2020
USD ($)
LoanContracts
Dec. 31, 2019
USD ($)
Loans, net [Abstract]        
Accrued interest receivable $ 8,000,000.0 $ 5,300,000    
Real estate loans for which formal foreclosure proceedings were in process 600,000 900,000    
TDRs 6,100,000 8,000,000.0    
TDRs performing in accordance with modified terms 5,900,000 7,600,000    
Estimated loan loss reserves $ 300,000 $ 300,000    
Number of Contracts | LoanContracts 2 3 3  
TDRs, for which there was a payment default and the loans were modified within the twelve months prior to default $ 0 $ 0    
Loan modified with a recorded investment 100,000 600,000 $ 200,000  
Financing Receivable, Allowance for Credit Loss 24,736,000 21,606,000 23,816,000 $ 13,905,000
Increase (decrease) in allowance 3,100,000 (2,800,000)    
Provision For Loan Losses Expensed 7,065,000 (2,842,000) 9,035,000  
Net loan charge-offs or (recoveries) 3,935,000 (632,000) $ 2,393,000  
Purchase of real estate secured adjustable rate loans 421,700,000 97,500,000    
Net deferred costs 10,800,000 3,900,000    
Transfers from HFI to HFS 0 9,400,000    
Third Party [Member]        
Purchase of real estate secured adjustable rate loans $ 15,000,000.0 $ 17,400,000