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Other Comprehensive Income - Rollforward of AOCI (Details) $ in Thousands | 6 Months Ended
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Jun. 30, 2026 USD ($)
AOCI Attributable to Parent, Net of Tax [Roll Forward] |
Balance, beginning of period | $ 5,147,551
Other comprehensive income (loss) before reclassifications | (36,976)
Less: Amounts reclassified from AOCI | (2,547)
Balance, end of period | 5,013,359
Accumulated Other Comprehensive Income (Loss) |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |
Balance, beginning of period | (134,394)
Balance, end of period | (168,823)
Net unrealized gains and (losses) on available-for-sale securities |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |
Balance, beginning of period | (120,686)
Other comprehensive income (loss) before reclassifications | (36,976)
Less: Amounts reclassified from AOCI | (2,247)
Balance, end of period | (155,415)
Net benefit plan assets and (obligations) recognized in shareholders' equity |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |
Balance, beginning of period | (13,708)
Other comprehensive income (loss) before reclassifications | 0
Less: Amounts reclassified from AOCI | (300)
Balance, end of period | $ (13,408)

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