Retirement Plans And Other Postretirement Benefits (Schedule Of Pension Plan Assets Categorized By Level Within Fair Value Measurement Hierarchy) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	$ 244,612	$ 233,075
Large/mid-capitalization equity securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	68,739	63,146
Small-capitalization equity securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	16,588	19,932
International and emerging market equity securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	25,174	24,325
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	61,845	18,008
Private equity and hedge funds
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	49,017	52,027
Other assets
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	6,868	5,629
Total Plan Assets at Fair Value [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	195,595	181,048
Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	6,943	40,890
Contracts with Insurance Companies
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	9,438	9,118
Quoted Prices in Active Markets for Identical Assets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	133,618	160,612
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Large/mid-capitalization equity securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	68,739	63,146
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Small-capitalization equity securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	16,588	19,932
Quoted Prices in Active Markets for Identical Assets (Level 1) \| International and emerging market equity securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	25,174	24,325
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	9,306	6,690
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Other assets
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	6,868	5,629
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	6,943	40,890
Quoted Prices in Active Markets for Identical Assets (Level 1) \| Contracts with Insurance Companies
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	0	0
Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	52,539	11,318
Significant Other Observable Inputs (Level 2) \| Large/mid-capitalization equity securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	0	0
Significant Other Observable Inputs (Level 2) \| Small-capitalization equity securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	0	0
Significant Other Observable Inputs (Level 2) \| International and emerging market equity securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	0	0
Significant Other Observable Inputs (Level 2) \| Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	52,539	11,318
Significant Other Observable Inputs (Level 2) \| Other assets
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	0	0
Significant Other Observable Inputs (Level 2) \| Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	0	0
Significant Other Observable Inputs (Level 2) \| Contracts with Insurance Companies
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	0	0
Significant Unobservable Inputs (Level 3)
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	9,438	9,118
Significant Unobservable Inputs (Level 3) \| Large/mid-capitalization equity securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	0	0
Significant Unobservable Inputs (Level 3) \| Small-capitalization equity securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	0	0
Significant Unobservable Inputs (Level 3) \| International and emerging market equity securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	0	0
Significant Unobservable Inputs (Level 3) \| Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	0	0
Significant Unobservable Inputs (Level 3) \| Other assets
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	0	0
Significant Unobservable Inputs (Level 3) \| Cash and Cash Equivalents
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	0	0
Significant Unobservable Inputs (Level 3) \| Contracts with Insurance Companies
Defined Benefit Plan Disclosure [Line Items]
Total plan assets at fair value	$ 9,438	$ 9,118