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Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Schedule of Loan Purchases and Sales (Details) - USD ($) $ in Thousands |  |  | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2022 | Sep. 30, 2022 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Purchases |  |  | $ 483,980 | $ 1,907,222 | $ 270,179
Financing receivable sale |  |  | $ 536,920 | $ 398,015 | $ 26,362
Loans held-for-investment, purchase price as a percentage of loans outstanding |  |  | 99.10% | 100.80% | 100.30%
Gain (losses) on sale of loans |  | $ (23,500) | $ (20,300) | $ 12,900 | $ 2,000
Proceeds from Sale of Finance Receivables | $ 100,700 |  |  |  |
Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Asset-backed securities collateralized by loans sold |  | $ 400,000 |  |  |
Other commercial and industrial |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Purchases |  |  | 2,975 | 0 | 0
Sales |  |  | 22,880 | 47,142 | 6,940
Loans receivable, PPP |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Purchases |  |  | 0 | 1,536,213 | 0
Residential real estate |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Purchases |  |  | 207,251 | 92,939 | 495
Sales |  |  | 0 | 63,932 | 0
Personal Installment Loans Portfolio Segment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Purchases |  |  | 123,785 | 178,970 | 108,226
Sales |  |  | 500,001 | 212,255 | 0
Other Installment Loans Portfolio Segment |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Purchases |  |  | 149,969 | 99,100 | 161,458
Sales |  |  | 0 | 0 | 1,822
Specialty Lending |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Sales |  |  | 2,200 | 0 | 0
Multifamily |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Sales |  |  | 2,879 | 36,900 | 0
Commercial real estate owner occupied |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Sales |  |  | 8,960 | 19,420 | 0
Commercial real estate non-owner occupied |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |
Sales |  |  | $ 0 | $ 18,366 | $ 17,600

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