Stockholders' Equity (Line Items in Consolidated Income Statements Affected by Amounts Reclassified from Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of defined benefit pension and post-retirement items			$ (13,325)	$ (24,139)
OCI, Cash Flow Hedge, Reclassification for Discontinuance, Statement of Income or Comprehensive Income [Extensible Enumeration]			Interest and Dividend Income, Operating
Employee Benefit Plans [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of defined benefit pension and post-retirement items			$ (13,325)	$ (24,139)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications, net of tax	[1]	$ (42,670)	(88,203)
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]	(1,670)	1,747
Tax effect	[1]	356	(398)
Net of tax	[1]	(1,314)	1,349
Reclassification out of Accumulated Other Comprehensive Income [Member] | Available for Sale Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss on sale of AFS securities	[1]	0	(68,105)
Tax effect	[1]	0	15,380
Net of tax	[1]	0	(52,725)
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]	(4,888)	(6,800)
Tax effect	[1]	1,072	1,476
Net of tax	[1]	(3,816)	(5,324)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification of unrealized loss on cash flow hedges	[1]	(45,537)	(47,285)
Tax effect	[1]	9,882	10,697
Net of tax	[1]	(35,655)	(36,588)
Amortization of gain/ (loss) on terminated cash flow hedges	[1]	$ (2,407)	$ 6,571
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]	$ 522	$ (1,486)
Net of tax	[1]	$ (1,885)	$ 5,085

[1] Amounts in parentheses indicate reduction in net income.