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Business Description And Significant Accounting Policies: Allowance for Doubtful Accounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]      
Accounts Receivable, Allowance for Credit Loss, Current $ 2,113 $ 7,003 $ 2,444
Additions Charged to Costs and Expenses 9,110 2,444 8,927
Recoveries and Other Additions 3,529 3,560 4,728
Write-offs and Other Deductions (11,799) (10,894) (9,096)
Accounts Receivable, Allowance for Credit Loss, Current $ 2,953 $ 2,113 $ 7,003