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)