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Accumulated Other Comprehensive Income (Loss) - Schedule of AOCI (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | $ 3,012,018 | $ 2,972,656 | $ 2,852,453
Other comprehensive income (loss) before reclassifications | (798,735) | (143,515) | 103,826
Amounts reclassified from AOCI to income | 14,688 | (6,631) | (12,262)
Ending Balance | 5,128,595 | 3,012,018 | 2,972,656
Accumulated Other Comprehensive Income (Loss) |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (2,375) | 147,771 | 56,207
Ending Balance | (786,422) | (2,375) | 147,771
Unrealized Gains and Losses on Available- for-Sale Debt Securities |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | (2,950) | 145,335 | 56,131
Other comprehensive income (loss) before reclassifications | (639,463) | (144,948) | 97,596
Amounts reclassified from AOCI to income | 67 | (3,337) | (8,392)
Ending Balance | (642,346) | (2,950) | 145,335
Unrealized Gains and Losses on Held-to- Maturity Securities |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | 0 | 0 | 0
Other comprehensive income (loss) before reclassifications | (125,229) | 0 | 0
Amounts reclassified from AOCI to income | 12,565 | 0 | 0
Ending Balance | (112,664) | 0 | 0
Gains and Losses on Cash Flow Hedges |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | 543 | 2,584 | 240
Other comprehensive income (loss) before reclassifications | (34,043) | 1,433 | 6,230
Amounts reclassified from AOCI to income | 1,951 | (3,474) | (3,886)
Ending Balance | (31,549) | 543 | 2,584
Defined Benefit Pension Plans |  |  |
AOCI Attributable to Parent, Net of Tax [Roll Forward] |  |  |
Beginning Balance | 32 | (148) | (164)
Other comprehensive income (loss) before reclassifications | 0 | 0 | 0
Amounts reclassified from AOCI to income | 105 | 180 | 16
Ending Balance | $ 137 | $ 32 | $ (148)

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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://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 50 -Paragraph 5 -URI https://asc.fasb.org/extlink&oid=124431353&loc=SL124442411-227067 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 17 -URI https://asc.fasb.org/extlink&oid=118261656&loc=d3e32136-110900 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6450520&loc=d3e32583-110901 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI https://asc.fasb.org/extlink&oid=126968391&loc=SL7669686-108580 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI https://asc.fasb.org/extlink&oid=124507222&loc=d3e1436-108581 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 50 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=124431353&loc=SL124442407-227067 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=118261656&loc=d3e32211-110900 + Details
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