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
		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).