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Accumulated Other Comprehensive (Loss) Income - Schedule Of The Changes In Components Of Accumulated Other Comprehensive Income (Loss) Balances (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | $ 6,950,834 | $ 5,984,612 | $ 5,837,218
Other comprehensive income (loss) | 35,336 | 145,033 | (675,248)
Ending balance | 7,723,054 | 6,950,834 | 5,984,612
Debt Securities |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | (601,881) | (694,815) | (85,703)
Net unrealized gains (losses) arising during the period | 50,302 | 76,930 | (620,870)
Amounts reclassified from AOCI | 9,427 | 16,004 | 11,758
Other comprehensive income (loss) | 59,729 | 92,934 | (609,112)
Ending balance | (542,152) | (601,881) | (694,815)
Cash Flow Hedges |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | 2,624 | (49,531) | 257
Net unrealized gains (losses) arising during the period | (87,447) | (4,277) | (52,623)
Amounts reclassified from AOCI | 64,036 | 56,432 | 2,835
Other comprehensive income (loss) | (23,411) | 52,155 | (49,788)
Ending balance | (20,787) | 2,624 | (49,531)
Foreign Currency Translation Adjustments |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | (21,339) | (21,283) | (4,935)
Net unrealized gains (losses) arising during the period | (982) | (56) | (16,348)
Amounts reclassified from AOCI | 0 | 0 | 0
Other comprehensive income (loss) | (982) | (56) | (16,348)
Ending balance | (22,321) | (21,339) | (21,283)
AOCI, Net of Tax |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning balance | (620,596) | (765,629) | (90,381)
Net unrealized gains (losses) arising during the period | (38,127) | 72,597 | (689,841)
Amounts reclassified from AOCI | 73,463 | 72,436 | 14,593
Other comprehensive income (loss) | 35,336 | 145,033 | (675,248)
Ending balance | $ (585,260) | $ (620,596) | $ (765,629)

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- Definition Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-14A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 55 -Paragraph 15 -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482739/220-10-55-15 + Details
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