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Accumulated Other Comprehensive Income (Loss) - Schedule of AOCI (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | $ 5,128,595 | $ 3,012,018 | $ 2,972,656
Other comprehensive income (loss) before reclassifications | 38,379 | (798,735) | (143,515)
Amounts reclassified from AOCI to income | 9,234 | 14,688 | (6,631)
Ending Balance | 5,562,900 | 5,128,595 | 3,012,018
Accumulated Other Comprehensive Income (Loss) |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (786,422) | (2,375) | 147,771
Ending Balance | (738,809) | (786,422) | (2,375)
Unrealized Gains and Losses on Available- for-Sale Debt Securities |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (642,346) | (2,950) | 145,335
Other comprehensive income (loss) before reclassifications | (14,817) | (639,463) | (144,948)
Amounts reclassified from AOCI to income | 4,645 | 67 | (3,337)
Ending Balance | (652,518) | (642,346) | (2,950)
Unrealized Gains and Losses on Held-to- Maturity Securities |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (112,664) | 0 | 0
Other comprehensive income (loss) before reclassifications | 1,325 | (125,229) | 0
Amounts reclassified from AOCI to income | 15,867 | 12,565 | 0
Ending Balance | (95,472) | (112,664) | 0
Gains and Losses on Hedges |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (31,549) | 543 | 2,584
Other comprehensive income (loss) before reclassifications | 51,871 | (34,043) | 1,433
Amounts reclassified from AOCI to income | (11,141) | 1,951 | (3,474)
Ending Balance | 9,181 | (31,549) | 543
Defined Benefit Pension Plans |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | 137 | 32 | (148)
Other comprehensive income (loss) before reclassifications | 0 | 0 | 0
Amounts reclassified from AOCI to income | (137) | 105 | 180
Ending Balance | $ 0 | $ 137 | $ 32

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + 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://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482765/220-10-50-5 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481674/830-30-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 17 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481694/830-30-45-17 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 830 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 20 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481694/830-30-45-20 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 220 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(19)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477250/944-220-S99-1 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482765/220-10-50-4 Reference 8: 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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