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Accounts And Other Receivables (Schedule Of Accounts And Other Receivable) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accounts and Financing Receivable, after Allowance for Credit Loss [Abstract]      
Accounts Receivable, Gross, Current $ 102,090 $ 85,274  
Customer receivables 105,048 89,124  
Other accounts and notes receivable 2,958 3,850  
Total accounts and other receivables 103,312 86,327  
Reclassification to accrued expenses for estimated sales returns (775) 0 $ 0
Allowance for Doubtful Accounts and Sales Returns 1,736 2,797  
Accounts Receivable, after Allowance for Credit Loss $ 103,312 $ 86,327