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Investment Securities - Narrative (Details) $ in Thousands |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) security | Dec. 31, 2021 USD ($) security | Dec. 31, 2020 USD ($)
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Proceeds from sales of investment securities available for sale |  |  | $ 983,575 | $ 689,856 | $ 387,810
Proceeds from sales of foreign subsidiaries |  |  | 0 | 3,765 | 0
Loss on sale of foreign subsidiaries |  |  | 0 | 2,840 | 0
Unrealized gain (loss) on investment securities |  |  | $ (710) | $ 2,720 | 1,447
Number of available-for-sale investment securities in the less than twelve month category (security) | security |  |  | 93 |  |
Number of available-for-sale investment securities in the twelve month or more category (security) | security |  |  | 63 |  |
Number of asset-backed securities with deterioration in future estimated cash flows | security |  |  | 4 |  |
Number of available-for-sale investment securities, unrealized loss position | security |  |  | 156 | 117 |
Accrued interest on held-to-maturity debt securities |  |  | $ 1,000 |  |
Debt Securities, Held-to-Maturity, Accrued Interest, after Allowance for Credit Loss, Statement of Financial Position [Extensible Enumeration] |  |  | Accrued interest receivable |  |
Transfer of investment securities available for sale to held to maturity |  | $ 500,200 | $ 500,174 | $ 0 | 0
Unrealized losses recorded in AOCI upon transfer to held to maturity |  | $ 50,000 |  |  |
Carrying value of consumer loans sold | $ 521,800 |  |  |  |
Loss on sale of loans | 23,500 |  | 20,300 | (12,900) | (2,000)
Debt securities, held-to-maturity, allowance for credit loss, excluding accrued interest |  |  | 0 |  |
Allowance for Credit Losses |  |  | 578 |  |
Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Asset-backed securities collateralized by loans sold | $ 400,000 |  |  |  |
Asset Pledged as Collateral |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Pledged investment securities transferred from available for sale to held to maturity |  |  | 16,700 | 11,300 |
Interest-only GNMA securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Proceeds from sales of investment securities available for sale |  |  |  |  | 15,400
Debt securities, realized gain |  |  |  |  | $ 1,000
Asset-backed securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Debt securities, held-to-maturity, allowance for credit loss, excluding accrued interest |  |  | 0 |  |
Allowance for Credit Losses |  |  | $ 578 | $ 0 |

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- Definition Amount, after allowance for credit loss, of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity), and investment in debt security measured at fair value with change in fair value recognized in net income (trading). + References No definition available. + Details
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