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Accumulated Other Comprehensive Loss (Reclassifications out of AOCI) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax | $ 33,119 | $ 60,253 | $ 7,115
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax | (7,617) | (13,858) | $ (1,636)
Amounts reclassified from accumulated other comprehensive income, net of tax | (5,776) | (27,276) |
Unrealized (losses) gains on securities available for sale |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, before Tax | 33,119 | 60,253 |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax | (7,617) | (13,858) |
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Net of Tax | 25,502 | 46,395 |
Amounts reclassified from accumulated other comprehensive income, net of tax | (25,502) | (46,395) |
Unrealized (losses) gains on securities available for sale transferred to held to maturity |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Other Comprehensive Income (Loss) Reclassification Adjustment Of Unrealized Losses From AOCI For Securities Available For Sale Transferred To Held To Maturity Before Tax | 1,475 | 495 |
Other Comprehensive Income (Loss) Reclassification Adjustment Of Unrealized Losses From AOCI For Securities Available For Sale Transferred To Held To Maturity Tax | (339) | (114) |
Other Comprehensive Income (Loss) Reclassification Adjustment Of Unrealized Losses From AOCI For Securities Available For Sale Transferred To Held To Maturity Net Of Tax | 1,136 | 381 |
Amounts reclassified from accumulated other comprehensive income, net of tax | (1,136) | (381) |
Defined Benefit Pension Items |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Reclassification adjustment for losses included in income before income taxes |  | 25,324 |
Total before taxes | 27,093 |  |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, Tax | 6,231 | 5,824 |
Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, after Tax | 20,862 | 19,500 |
Amounts reclassified from accumulated other comprehensive income, net of tax | $ 20,862 | $ 19,500 |

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