Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Jun. 30, 2026 |
Mar. 31, 2026 |
Sep. 30, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Statement of Comprehensive Income [Abstract] | ||||||||
| Net income | $ 128,704 | $ 131,377 | $ 124,200 | $ 130,748 | $ 120,721 | $ 84,306 | $ 384,281 | $ 335,775 |
| Other comprehensive (loss) income on available-for-sale ("AFS") securities, net of tax | (83,541) | 27,438 | (88,536) | 75,166 | ||||
| Other comprehensive gain (loss) on cash flow hedge, net of tax | 3,871 | (1,565) | 4,426 | (9,118) | ||||
| Other comprehensive income on defined benefit pension plan, net of tax | 0 | 40 | 0 | 40 | ||||
| Total comprehensive income, net of tax | $ 49,034 | $ 137,125 | $ 114,012 | $ 156,661 | $ 132,001 | $ 113,201 | $ 300,171 | $ 401,863 |
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, after tax and reclassification adjustment, of gain (loss) in value of unsold investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), attributable to parent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount, after tax and reclassification adjustment, of (increase) decrease in accumulated other comprehensive income for defined benefit plan, attributable to parent. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount, after reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness, attributable to parent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- References No definition available.
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