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, 2024	Jun. 30, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of defined benefit pension and post-retirement items		$ 22,014	$ (7,521)
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	(7,521)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications, net of tax	[1]	(22,129)	(16,805)
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]	(818)	(922)
Tax effect	[1]	184	207
Net of tax	[1]	(634)	(715)
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]	(2,254)	(3,272)
Tax effect	[1]	506	736
Net of tax	[1]	(1,748)	(2,536)
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]	(25,281)	(21,994)
Tax effect	[1]	5,681	4,953
Net of tax	[1]	(19,600)	(17,041)
Amortization of gain (loss) on terminated cash flow hedges	[1]	$ (190)	$ 4,501
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]	$ 43	$ (1,014)
Net of tax	[1]	$ (147)	$ 3,487

[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 11 – Retirement Plans for additional details).