Debt Securities - Narrative (Details) |
Jun. 30, 2025
USD ($)
creditRatingCategory
|
Dec. 31, 2024
USD ($)
|
|---|---|---|
| Schedule of Held-to-maturity Securities [Line Items] | ||
| Number of credit rating categories, highest | creditRatingCategory | 4 | |
| Debt securities, available for sale | $ 4,024,980,000 | $ 4,245,205,000 |
| Interest receivable, available-for-sale debt securities | 7,718,000 | 8,037,000 |
| ACL on available-for-sale debt securities | 0 | |
| Debt securities, held to maturity | 3,206,133,000 | 3,294,847,000 |
| Interest receivable, held-to-maturity debt securities | 16,333,000 | 16,538,000 |
| ACL on held-to-maturity debt securities | 0 | 0 |
| Past due | ||
| Schedule of Held-to-maturity Securities [Line Items] | ||
| Debt securities, available for sale | 0 | 0 |
| Debt securities, held to maturity | $ 0 | $ 0 |
| X | ||||||||||
- Definition Number Of Credit Rating Categories, Highest No definition available.
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- Definition Amount, after allowance for credit loss, of accrued interest on 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/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount excluding accrued interest, of allowance for credit loss on 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/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount excluding accrued interest, 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, after allowance for credit loss, of accrued interest on investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount excluding accrued interest, after allowance for credit loss, of investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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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- Details
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