Property And Depreciation (Narrative) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Depreciation	$ 37,600,000	$ 36,200,000	$ 36,700,000
Net book value of sold assets held for sale	0	400,000	4,400,000
Gain on sale of assets held for sale		$ 9,100,000	$ 3,400,000
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]		Other Operating Income (Expense), Net	Other Operating Income (Expense), Net
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations
Property, Plant and Equipment [Line Items]
Net book value of assets held for sale	$ 6,700,000	$ 0