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Stockholders' Equity (Line Items in Consolidated Income Statements Affected by Amounts Reclassified from Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2025 | Jun. 30, 2024
Employee Benefit Plans [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Amortization of defined benefit pension and post-retirement items |  |  | $ 22,014
Reclassification out of Accumulated Other Comprehensive Income [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Total reclassifications, net of tax | [1] | $ (15,156) | (22,129)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Held to Maturity Securities Transferred from AFS [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Amortization of unrealized net loss on securities transferred to HTM | [1] | (792) | (818)
Tax effect | [1] | 196 | 184
Net of tax | [1] | (596) | (634)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Employee Benefit Plans [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Amortization of defined benefit pension and post-retirement items | [1],[2] | (1,888) | (2,254)
Tax effect | [1] | 594 | 506
Net of tax | [1] | (1,294) | (1,748)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Reclassification of unrealized loss on cash flow hedges | [1] | (14,159) | (25,281)
Tax effect | [1] | 3,235 | 5,681
Net of tax | [1] | (10,924) | (19,600)
Amortization of loss on terminated cash flow hedges | [1] | $ (3,036) | $ (190)
OCI, Cash Flow Hedge, Reclassification for Discontinuance, Statement of Income or Comprehensive Income [Extensible Enumeration] |  | Interest and Dividend Income, Operating | Interest and Dividend Income, Operating
Tax effect | [1] | $ 694 | $ 43
Net of tax | [1] | $ (2,342) | $ (147)
[1] | Amounts in parentheses indicate reduction in net income.
[2] | These AOCI components are included in the computation of net periodic pension and post-retirement cost that is reported with other noninterest expense (see Note 13 – Retirement Plans for additional details).

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