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Loans - Schedule of Internal Risk Tier Categories (Details) - Total Loans - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Financing Receivable, Past Due [Line Items]    
Total loans $ 407,693 $ 344,106
Credit card | Credit card loans    
Financing Receivable, Past Due [Line Items]    
Total loans 292,204 243,959
Credit card | Credit card loans | ≥ 800    
Financing Receivable, Past Due [Line Items]    
Total loans 22,999 14,421
Credit card | Credit card loans | 780 – 799    
Financing Receivable, Past Due [Line Items]    
Total loans 15,905 11,327
Credit card | Credit card loans | 760 – 779    
Financing Receivable, Past Due [Line Items]    
Total loans 18,180 12,179
Credit card | Credit card loans | 740 – 759    
Financing Receivable, Past Due [Line Items]    
Total loans 20,179 14,501
Credit card | Credit card loans | 720 – 739    
Financing Receivable, Past Due [Line Items]    
Total loans 25,172 19,343
Credit card | Credit card loans | 700 – 719    
Financing Receivable, Past Due [Line Items]    
Total loans 30,789 26,239
Credit card | Credit card loans | 680 – 699    
Financing Receivable, Past Due [Line Items]    
Total loans 36,490 31,543
Credit card | Credit card loans | 660 – 679    
Financing Receivable, Past Due [Line Items]    
Total loans 34,714 31,958
Credit card | Credit card loans | 640 – 659    
Financing Receivable, Past Due [Line Items]    
Total loans 25,265 25,959
Credit card | Credit card loans | 620 – 639    
Financing Receivable, Past Due [Line Items]    
Total loans 15,922 15,566
Credit card | Credit card loans | 600 – 619    
Financing Receivable, Past Due [Line Items]    
Total loans 9,625 8,968
Credit card | Credit card loans | ≤ 599    
Financing Receivable, Past Due [Line Items]    
Total loans $ 36,964 $ 31,955