Summary of Significant Accounting Policies - Summary of Cash and Cash Equivalents (Detail) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Dec. 31, 2025 |
Jun. 30, 2025 |
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| Accounting Policies [Abstract] | |||
| Due from the FRB | $ 4,829,972 | $ 9,908,193 | |
| Cash and due from banks | 779,876 | $ 952,547 | 1,087,696 |
| Cash and cash equivalents at end of period | $ 5,609,848 | $ 10,995,889 |
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- Definition A bank's interest bearing deposit account held at the Federal Reserve Bank. No definition available.
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- References No definition available.
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- Definition Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition For banks and other depository institutions: Includes cash on hand (currency and coin), cash items in process of collection, noninterest bearing deposits due from other financial institutions (including corporate credit unions), and noninterest bearing balances with the Federal Reserve Banks, Federal Home Loan Banks and central banks. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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