Investment Securities (Investment Securities, At Fair Value) (Details) - USD ($) $ in Thousands |
Jun. 30, 2026 |
Mar. 31, 2026 |
Dec. 31, 2025 |
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| Investment Securities [Abstract] | |||||
| Available for sale debt securities | $ 8,322,634 | $ 9,095,513 | |||
| Trading debt securities | 57,651 | 40,080 | |||
| Equity securities with a readily determinable fair value | 33,195 | 47,551 | |||
| Equity Securities without Readily Determinable Fair Value, Amount | 81,529 | $ 10,000 | 9,803 | ||
| Federal Reserve Bank Stock | 51,605 | 35,918 | |||
| Federal Home Loan Bank Stock | 10,099 | 10,198 | |||
| Private equity investments | 181,033 | 184,343 | |||
| Total investment securities | [1] | 8,737,746 | 9,423,406 | ||
| Interest Receivable, Current | $ 40,000 | $ 42,000 | |||
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- Definition Investment Securities Disclosure No definition available.
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- Definition Private equity investment securities held. No definition available.
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- Definition Sum of Available for Sale, Trading and Non-Marketable securities. No definition available.
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of investment in equity security without readily determinable fair value. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Federal Home Loan Bank (FHLB) stock represents an equity interest in a FHLB. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Federal Reserve Bank stock represents an equity interest in the Federal Reserve Bank. It does not have a readily determinable fair value because its ownership is restricted and it lacks a market (liquidity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Carrying amount as of the balance sheet date of current interest earned but not received. Also called accrued interest or accrued interest receivable. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in net income (trading). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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