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v3.25.1

Investment Securities - Narrative (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Jun. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Debt securities, available-for-sale, transfer to held-to-maturity |  |  | $ 1,990,000,000 | $ 500,800,000 |
Debt securities, held-to-maturity transfer, unrealized loss | $ 103,800,000 |  |  |  |
Available-for-sale, transfer to held-to-maturity, gain (loss) | 0 |  |  |  |
Held to maturity mortgage backed securities | 3,618,770,000 |  |  |  | $ 3,639,850,000
Available for sale mortgage backed securities | 2,828,940,000 |  |  |  | 2,852,774,000
Held-to-maturity, interest receivable | 17,100,000 |  |  |  |
Available-for-sale, interest receivable | 21,500,000 |  |  |  |
Available-for-sale securities | 2,491,849,000 |  |  |  | 2,529,426,000
Securities valued at less than historical cost, amount | $ 2,412,227,000 |  |  |  | 2,467,223,000
Securities valued at less than historical cost (as percent) | 96.80% |  |  |  |
Provision for credit losses, AFS securities | $ 0 | $ 0 |  |  |
Securities pledged as collateral | $ 2,220,000,000 |  |  |  | 2,360,000,000
Realized gains |  | 0 |  |  |
Realized losses |  | $ 0 |  |  |
Income tax benefit related to security gains (losses) (as percent) | 26.135% | 26.135% |  |  |
Commercial Mortgage Backed Securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Held to maturity mortgage backed securities | $ 134,200,000 |  |  |  | 136,000,000.0
Available for sale mortgage backed securities | 515,900,000 |  |  |  | 517,200,000
Residential Mortgage Backed Securities |  |  |  |  |
Debt Securities, Available-for-sale [Line Items] |  |  |  |  |
Held to maturity mortgage backed securities | 914,000,000.0 |  |  |  | 934,100,000
Available for sale mortgage backed securities | $ 865,000,000.0 |  |  |  | $ 875,500,000

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- Definition Amortized cost excluding accrued interest, before 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). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479130/326-30-45-1 + Details
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