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, 2022	Jun. 30, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications, net of tax	[1]	$ 6,876	$ 1,332
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)	(2,166)
Tax effect	[1]	385	(487)
Net of tax	[1]	(1,322)	(1,679)
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]	(527)	101
Tax effect	[1]	119	(23)
Net of tax	[1]	(408)	78
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]	(1,652)	(3,445)
Tax effect	[1]	373	774
Net of tax	[1]	(1,279)	(2,671)
Gains and Losses on Cash Flow Hedges [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassification of unrealized gain on cash flow hedges	[1]	6,977	12,991
Tax effect	[1]	(1,575)	(2,919)
Net of tax	[1]	5,402	10,072
Amortization of gain on terminated cash flow hedges	[1]	5,790
Tax effect	[1]	(1,307)
Net of tax	[1]	$ 4,483
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]		(4,468)
Net of tax	[1]		$ (4,468)

[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)