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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
 3 Months Ended
Mar. 31, 2025
Mar. 31, 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] $ (7,371) (10,858)
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] (405) (428)
Tax effect [1] 109 96
Net of tax [1] (296) (332)
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] (955) (1,019)
Tax effect [1] 384 229
Net of tax [1] (571) (790)
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] (6,950) (12,658)
Tax effect [1] 1,607 2,844
Net of tax [1] (5,343) (9,814)
Amortization of gain (loss) on terminated cash flow hedges [1] $ (1,510) $ 100
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] $ 349 $ (22)
Net of tax [1] $ (1,161) $ 78
[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 12 – Retirement Plans for additional details).