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INVESTMENT SECURITIES - Additional Information (Detail) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 USD ($) assetBackedSecurity security | Jun. 30, 2023 USD ($) assetBackedSecurity | Jun. 30, 2024 USD ($) security corporateNote | Jun. 30, 2023 USD ($) corporateNote | Dec. 31, 2023 USD ($) security
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Proceeds from sales of investment securities available for sale | $ 218,700 | $ 0 | $ 240,688 | $ 0 |
Number of available-for-sale investment securities, unrealized loss position, less than twelve month category | security | 28 |  | 28 |  |
Number of available-for-sale investment securities, unrealized loss position, twelve month or more category | security | 93 |  | 93 |  |
Number of asset-backed securities with deterioration in future estimated cash flows | assetBackedSecurity | 1 | 4 |  |  |
Number of corporate notes with deterioration in future estimated cash flows | corporateNote |  |  | 20 | 9 |
Number of available-for-sale investment securities, unrealized loss position | security | 121 |  | 121 |  | 119
Debt securities, available for sale | $ 2,477,758 |  | $ 2,477,758 |  | $ 2,376,860
Net gain on sale of loans | (200) | $ 400 | (200) | $ 400 |
Investment securities held to maturity | 962,799 |  | 962,799 |  | 1,103,170
Servicing assets |  | 3,800 |  | 3,800 |
Variable Interest Entity, Not Primary Beneficiary |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Investment securities held to maturity |  | 436,800 |  | 436,800 |
Asset-backed securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Debt securities, available for sale | 47,112 |  | 47,112 |  | 92,629
Investment securities held to maturity | 446,070 |  | 446,070 |  | 575,990
Consumer Loan, Held-For-Sale |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Net gain on sale of loans |  | 1,200 |  | 1,200 |
Consumer Loan, Held-For-Sale | Other Installment Loans |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Financing receivable, sale |  | 154,000 |  | 154,000 |
Consumer Loan, Held-For-Sale | Personal And Other Installment Loans |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Carrying value of consumer loans sold |  | $ 556,700 |  | $ 556,700 |
Asset Pledged as Collateral |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Debt securities, available for sale | 1,300,000 |  | 1,300,000 |  | 1,200,000
Debt securities | $ 388,700 |  | $ 388,700 |  | $ 398,400

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