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Loans and Allowance for Credit Losses - Narrative (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Premiums and discounts associated with acquired loans | $ 9,848 |  | $ 9,848 |  | $ 13,383
Net deferred origination and factoring fees | 3,944 |  | 3,944 |  | 3,307
Accrued interest on loans | 23,230 |  | 23,230 |  | 19,279
Gross loans | 4,324,758 |  | 4,324,758 |  | 4,120,291
Pledged loans | 1,598,726 |  | 1,598,726 |  | 1,356,922
Credit loss expense | 2,643 | $ 2,901 | 5,256 | $ 3,402 |
Total past due Over-Formula Advances recorded in factored receivables | 9,093 |  | 9,093 |  | 18,296
Interest earned on nonaccrual loans | 0 | 0 | 0 | 0 |
Commitments to lend | 0 |  | 0 |  |
Past Due 90 Days or More |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Gross loans | 31,147 |  | 31,147 |  | 41,367
Loans Held for Investment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Net charge-offs | 10,789 | 215 | 13,004 | 1,739 |
Credit loss expense | 3,514 | 2,069 | 5,167 | 2,933 |
Changes in Allowance for Credit Losses |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Allowance for credit losses due to increase (decrease) in loss drivers | 0 | 2,558 | 0 | 1,541 |
Allowance for credit losses due to increase (decrease) in specific reserves | (7,108) | 919 | (8,019) | 1,798 |
Allowance for credit losses due to increase (decrease) in loan volume and mix | 0 | 1,624 | 0 | 2,146 |
Factored receivables |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Customer reserves | 198,960 |  | 198,960 |  | 249,288
Gross loans | 1,173,794 |  | 1,173,794 |  | 1,237,449
Total past due Over-Formula Advances recorded in factored receivables | 0 |  | 0 |  | 0
Factored receivables | Past Due 90 Days or More |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Gross loans | 26,819 |  | 26,819 |  | 37,142
Factored receivables | Over-Formula Advances |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Gross loans | 4,011 |  | 4,011 |  | 8,202
Net charge-offs |  |  | 3,330 |  |
Reimbursement for charge-off | 1,665 |  | 1,665 |  |
Factored receivables | Over-Formula Advances | Past Due 90 Days or More |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Total past due Over-Formula Advances recorded in factored receivables | 4,011 |  | 4,011 |  | 8,202
Factored receivables | Misdirected Payments Receivable | United States Postal Service |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Gross loans | 19,361 |  | 19,361 |  | 19,361
Factored receivables | Loans Held for Investment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Credit loss expense | 1,521 | (120) | 2,071 | 2,115 |
1-4 family residential |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Gross loans | 130,628 |  | 130,628 |  | 125,981
Total past due Over-Formula Advances recorded in factored receivables | 1,085 |  | 1,085 |  | 1,391
1-4 family residential | Past Due 90 Days or More |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Gross loans | 431 |  | 431 |  | 776
1-4 family residential | Loans Held for Investment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Credit loss expense | 34 | $ 305 | 203 | $ 284 |
1-4 family residential | Real Eatate Loans |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Residential real estate loans in process of foreclosure | $ 0 |  | $ 0 |  | $ 129

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