Borrowings and Subordinated Debt - Summary of Borrowings and Debentures (Details) - USD ($) $ in Thousands |
Mar. 31, 2026 |
Dec. 31, 2025 |
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| Debt Instrument [Line Items] | ||
| Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 4.33% | 4.47% |
| Other Short-Term Borrowings | $ 440,000 | $ 240,000 |
| Short-Term Debt, Other, Average Rate Paid | 3.68% | 3.69% |
| Total Borrowings | $ 2,551,250 | $ 2,063,819 |
| Borrowings (including $111,250 and $113,634 at fair value, respectively) | 2,551,250 | 2,063,819 |
| Credit-linked notes | ||
| Debt Instrument [Line Items] | ||
| Credit-linked Notes | $ 111,250 | $ 113,634 |
| Credit-linked ,Variable interest, percentage rate | 14.41% | 14.63% |
| Federal Home Loan Bank of San Francisco | Secured Debt | ||
| Debt Instrument [Line Items] | ||
| Line of credit, current | $ 2,000,000 | $ 1,710,185 |
| Long-Term Debt, Percentage Bearing Fixed Interest, Percentage Rate | 3.91% | 3.90% |
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- Definition Total Borrowings No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount, after deduction of unamortized premium (discount) and debt issuance cost, of long-term debt. Excludes lease obligation. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a set, unchanging rate. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The interest rate applicable to the portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of the carrying amount of long-term borrowings outstanding as of the balance sheet date, including current maturities, which accrues interest at a rate subject to change from time to time. No definition available.
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- Definition Amount of borrowings classified as other, maturing within one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The portion of the carrying amount of short-term borrowings outstanding as of the balance sheet date, which accrues interest at a rate subject to change from time to time. No definition available.
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