|**Fair Value of Financial Instruments and Concentrations of Credit Risk (Tables)** | 12 Months Ended                                                                                                                                                                                                                                                                                                    
|---------------------------------------------------------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
|**Fair Value Disclosures [Abstract]**                                              |                                                                                                                                                                                                                                                                                                                    
|Schedule of Accounts Receivable                                                    | Receivables consisted of the following at December 31:(In thousands)20232022Trade receivables:Gross trade receivables$164,292$227,762Allowance for credit losses(4,751)(4,817)Net trade receivables159,541222,945Income tax receivables2,9842,697Other receivables5,93216,605Total receivables, net$168,457$242,247
|                                                                                   |                                                                                                                                                                                                                                                                                                                    
|(In thousands)                                                                     | 2023                                                                                                                                                                                                                                                                                                               
|Trade receivables:                                                                 |                                                                                                                                                                                                                                                                                                                    
|Gross trade receivables                                                            | $                                                                                                                                                                                                                                                                                                                  
|Allowance for credit losses                                                        | (4,751)                                                                                                                                                                                                                                                                                                            
|Net trade receivables                                                              | 159,541                                                                                                                                                                                                                                                                                                            
|Income tax receivables                                                             | 2,984                                                                                                                                                                                                                                                                                                              
|Other receivables                                                                  | 5,932                                                                                                                                                                                                                                                                                                              
|Total receivables, net                                                             | $                                                                                                                                                                                                                                                                                                                  
|Schedule of Changes in Our Allowance for Credit Losses                             | Changes in our allowance for credit losses were as follows:(In thousands)202320222021Balance at beginning of year$4,817$4,587$5,024Credit loss expense1,2091,039664Write-offs, net of recoveries(1,275)(809)(1,101)Balance at end of year$4,751$4,817$4,587                                                        
|                                                                                   |                                                                                                                                                                                                                                                                                                                    
|(In thousands)                                                                     | 2023                                                                                                                                                                                                                                                                                                               
|Balance at beginning of year                                                       | $                                                                                                                                                                                                                                                                                                                  
|Credit loss expense                                                                | 1,209                                                                                                                                                                                                                                                                                                              
|Write-offs, net of recoveries                                                      | (1,275)                                                                                                                                                                                                                                                                                                            
|Balance at end of year                                                             | $                                                                                                                                                                                                                                                                                                                  

X- DefinitionTabular disclosure of allowance for credit loss on financing receivable.
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