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Stockholders' Equity (Line Items in Consolidated Income Statements Affected by Amounts Reclassified from Accumulated Other Comprehensive Income) (Details) - Reclassification out of Accumulated Other Comprehensive Income [Member] - USD ($) $ in Thousands | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Total reclassifications, net of tax | [1] | $ (16,805) | $ 6,876
Accumulated Other Comprehensive Loss Available for Sale Securities [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Loss on sale of AFS securities | [1] |  | (1,707)
Tax effect | [1] |  | 385
Net of tax | [1] |  | (1,322)
Held to Maturity Securities Transferred from AFS [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Amortization of unrealized net gain (loss) on securities transferred to HTM | [1] | (922) | (527)
Tax effect | [1] | 207 | 119
Net of tax | [1] | (715) | (408)
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] | (3,272) | (1,652)
Tax effect | [1] | 736 | 373
Net of tax | [1] | (2,536) | (1,279)
Gains and Losses on Cash Flow Hedges [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Reclassification of unrealized gain/(loss) on cash flow hedges | [1] | (21,994) | 6,977
Tax effect | [1] | 4,953 | (1,575)
Net of tax | [1] | (17,041) | 5,402
Amortization of gain on terminated cash flow hedges | [1] | 4,501 | 5,790
Tax effect | [1] | (1,014) | (1,307)
Net of tax | [1] | $ 3,487 | $ 4,483
[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 10 – Retirement Plans for additional details).

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