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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |
Beginning Balance | $ (10,317) |
Investment securities (gains), net | 0 | $ (75)
Net unrealized (losses) on AFS securities transferred to HTM securities | (67,604) | 0
Personnel expense | (104,811) | (104,026)
Amortization of Net Unrealized Gain on Available-for-Sale Securities Transfered to Held-to-maturity Securities | (1,108) | (518)
Other comprehensive (loss) | (126,708) | (16,811)
Ending Balance | (137,024) |
Investment Securities AFS |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |
Beginning Balance | (5,266) | 41,325
Other comprehensive (loss) before reclassifications | (103,284) | (23,979)
Net unrealized (losses) on AFS securities transferred to HTM securities, prior to transfer | (67,604) |
Investment securities (gains), net | (21) | 39
Personnel expense | 0 | 0
Other expense | 0 | 0
Amortization of Net Unrealized Gain on Available-for-Sale Securities Transfered to Held-to-maturity Securities | 1,108 | 518
Income tax benefit | 43,098 | 5,851
Other comprehensive (loss) | (126,702) | (17,571)
Ending Balance | (131,968) | 23,754
Defined Benefit Pension and Postretirement Obligations |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |
Beginning Balance | (5,051) | (28,707)
Other comprehensive (loss) before reclassifications | 0 | 0
Net unrealized (losses) on AFS securities transferred to HTM securities, prior to transfer | 0 |
Investment securities (gains), net | 0 | 0
Personnel expense | (81) | (37)
Other expense | 74 | 1,050
Amortization of Net Unrealized Gain on Available-for-Sale Securities Transfered to Held-to-maturity Securities | 0 | 0
Income tax benefit | 2 | (253)
Other comprehensive (loss) | (6) | 760
Ending Balance | (5,057) | (27,947)
Accumulated Other Comprehensive Income (Loss) |  |
Accumulated Other Comprehensive Income (Loss) [Roll Forward] |  |
Beginning Balance | (10,317) | 12,618
Other comprehensive (loss) before reclassifications | (103,284) | (23,979)
Net unrealized (losses) on AFS securities transferred to HTM securities, prior to transfer | (67,604) |
Investment securities (gains), net | (21) | 39
Personnel expense | (81) | (37)
Other expense | 74 | 1,050
Amortization of Net Unrealized Gain on Available-for-Sale Securities Transfered to Held-to-maturity Securities | 1,108 | 518
Income tax benefit | 43,100 | 5,598
Other comprehensive (loss) | (126,708) | (16,811)
Ending Balance | $ (137,024) | $ (4,193)

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- Definition Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)(a)(4)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e637-108580 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(23)(a)(3)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 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 http://asc.fasb.org/extlink&oid=124509347&loc=SL7669686-108580 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 65 -Paragraph 2 -Subparagraph (h)(2) -URI http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -Section 65 -Paragraph 2 -Subparagraph (g)(2)(ii) -URI http://asc.fasb.org/extlink&oid=124501264&loc=SL117420844-207641 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14 -URI http://asc.fasb.org/extlink&oid=124509347&loc=d3e681-108580 + Details
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- Definition Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27357-111563 + Details
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