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Loans Held for Investment - Amortized Cost of the MLTB (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2023
USD ($)
Mar. 31, 2022
loan
Dec. 31, 2022
loan
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Number of loans modified | loan     5
Balance | $ $ 851    
CRE owner-occupied      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Number of loans modified | loan   3 3
Business loans secured by real estate      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Balance | $ 851    
Business loans secured by real estate | CRE owner-occupied      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Number of loans modified | loan   1  
Balance | $ $ 851    
Percent of Total Class of Loans 0.04%