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Accounts And Other Receivables (Schedule Of Reconciliation Of The Beginning And Ending Balances Of The Allowance For Doubtful Accounts And Sales Returns) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |
Accounts and other receivables, allowance for doubtful accounts and sales returns | $ 2,937 | $ 3,304 |
Customer receivables | 127,664 | 123,439 |
Allowance For Doubtful Accounts |  |  |
Allowance for Doubtful Accounts Receivable [Roll Forward] |  |  |
Balance, beginning of year | 3,304 | 3,102 | $ 3,746
Charges to expense | 553 | 2,369 | 1,410
Recoveries | (56) | (857) | (32)
Write-offs and settlements | (710) | (1,322) | (2,167)
Foreign exchange and other | (154) | 12 | 145
Balance, end of year | $ 2,937 | $ 3,304 | $ 3,102

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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109196051&loc=SL49130549-203045 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(3)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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