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Accumulated Other Comprehensive Loss (Schedule Of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Accumulated Other Comprehensive Income (Loss), before Tax | $ (164,576) | $ (305,438) |
Deferred tax expense (benefit) | (37,853) | (70,251) |
Accumulated other comprehensive income (loss), net of tax | (126,723) | (235,187) |
Income taxes | (134,677) | (103,297) | $ (219,946)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | (18,292) | (23,667) |
Unrealized gains (losses) on securities available for sale |  |  |
Accumulated Other Comprehensive Income (Loss), before Tax | 7,522 | (50,007) |
Deferred tax expense (benefit) | 1,730 | (11,502) |
Accumulated other comprehensive income (loss), net of tax | 5,792 | (38,505) |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | 5,479 | 270 |
Defined benefit pension items |  |  |
Accumulated Other Comprehensive Income (Loss), before Tax | (172,098) | (163,030) |
Deferred tax expense (benefit) | (39,583) | (37,497) |
Accumulated other comprehensive income (loss), net of tax | (132,515) | (125,533) |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | (8,456) | (10,765) |
Reclassification adjustment for losses included in income before income taxes | 10,924 | 13,902 |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax | (10,981) | (13,981) |
Unrealized losses on securities available for sale transferred from (to) held to maturity |  |  |
Other Comprehensive Income (Loss) Reclassification Adjustment Of Unrealized Losses From AOCI For Securities Available For Sale Transferred To Held To Maturity Before Tax | (19,889) | (17,106) |
Accumulated Other Comprehensive Income (Loss), before Tax | 0 | (92,401) |
Deferred tax expense (benefit) | 0 | (21,252) |
Accumulated other comprehensive income (loss), net of tax | 0 | (71,149) |
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax | (15,315) | (13,172) |
Other Comprehensive Income (Loss) Reclassification Adjustment Of Unrealized Losses From AOCI For Securities Available For Sale Transferred To Held To Maturity Tax | 4,574 | 3,934 |
Other Comprehensive Income (Loss) Reclassification Adjustment Of Unrealized Losses From AOCI For Securities Available For Sale Transferred To Held To Maturity Net Of Tax | $ (15,315) | $ (13,172) |

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- Definition Other Comprehensive Income (Loss) Reclassification Adjustment Of Unrealized Losses From AOCI For Securities Available For Sale Transferred To Held To Maturity Tax + References No definition available. + Details
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- Definition Amount before tax of increase (decrease) in accumulated equity from transactions and other events and circumstances from non-owner sources, including portion attributable to noncontrolling interest. Excludes net income (loss), and accumulated changes in equity from transactions resulting from investments by owners (distributions to owners). + References No definition available. + Details
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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://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=114867106&loc=d3e637-108580 Reference 2: 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=114867106&loc=SL7669686-108580 Reference 3: 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=114867106&loc=d3e681-108580 + Details
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109238882&loc=d3e38679-109324 + Details
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