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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 | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Total reclassifications, net of tax | [1] | $ (7,762) | $ 2,301
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] | (494) | (261)
Tax effect | [1] | 111 | 59
Net of tax | [1] | (383) | (202)
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] | (1,519) | (1,209)
Tax effect | [1] | 340 | 273
Net of tax | [1] | (1,179) | (936)
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] | (10,629) | 3,875
Tax effect | [1] | 2,393 | (875)
Net of tax | [1] | (8,236) | 3,000
Amortization of gain on terminated cash flow hedges | [1] | 2,628 | 2,879
Tax effect | [1] | (592) | (650)
Net of tax | [1] | $ 2,036 | 2,229
Gains and Losses on Equity Method Investment [Member] |  |  |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |  |  |
Reclassification of unrealized loss on equity method investment | [1] |  | (468)
Net of tax | [1] |  | $ (468)
[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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