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Accumulated Other Comprehensive Income - Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net unrealized gain (loss), tax expense (benefit) | $ 185,000 | $ 185,000 | $ 568,000 | $ 335,000
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Balance at beginning of period | 49,511,000 | 42,412,000 | 48,375,000 | 40,958,000
Other net changes | 1,030,000 | 640,000 | 2,257,000 | 1,195,000
Balance at end of period | 49,451,000 | 43,953,000 | 49,451,000 | 43,953,000
Accumulated Other Comprehensive Income (Loss) |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Balance at beginning of period | (13,621,000) | (17,576,000) | (14,848,000) | (18,131,000)
Other net changes | 1,030,000 | 640,000 | 2,257,000 | 1,195,000
Balance at end of period | (12,591,000) | (16,936,000) | (12,591,000) | (16,936,000)
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-Sale, Parent |  |  |  |
Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net unrealized gain (loss), tax expense (benefit) | 116,000 | 51,000 | 369,000 | 77,000
Other reclassifications included in other revenue, tax expense (benefit) | 8,000 | 3,000 | 10,000 | 5,000
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Net unrealized gain (loss), net of tax expense (benefit) | 501,000 | 183,000 | 1,309,000 | 296,000
Other reclassifications included in other revenue, net of tax expense (benefit) | 22,000 | 7,000 | 30,000 | 15,000
Amortization of Held to Maturity Securities Transferred from Available for Sale Attributable to Parent |  |  |  |
Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net unrealized gain (loss), tax expense (benefit) | 61,000 | 131,000 | 189,000 | 253,000
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Other net changes | 500,000 | 452,000 | 910,000 | 894,000
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent |  |  |  |
Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net unrealized gain (loss), tax expense (benefit) | (4,000) |  | (4,000) |
Reclassifications, tax expense (benefit) | 4,000 |  | 4,000 |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Net unrealized gain (loss), net of tax expense (benefit) | (11,000) |  | (11,000) |
Other reclassifications included in other revenue, net of tax expense (benefit) | 13,000 |  | 13,000 |
Other Accumulated Other Comprehensive Income |  |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |  |
Other net changes | 5,000 | (2,000) | 6,000 | (10,000)
Other Accumulated Other Comprehensive Income | Maximum |  |  |  |
Accumulated Other Comprehensive Income [Line Items] |  |  |  |
Net unrealized gain (loss), tax expense (benefit) | $ 500 | $ 500 | $ 500 | $ 500

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