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Allowance for Expected Credit Losses - Change In Allowance for Credit Losses (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Trade receivables |  |  |
Beginning balance | $ 75,176 | $ 53,412 | $ 51,501
Charges to cost and expenses, net of recoveries | 3,934 | 9,326 | 734
Write-offs | (2,015) |  |
Currency effects and other, net | (2,759) | 5,468 | 1,177
Ending balance | 74,336 | 75,176 | 53,412
Short-term contract assets |  |  |
Beginning balance | 3,205 | 206 | 0
Charges to cost and expenses, net of recoveries | 0 | 0 | 206
Write-offs | 0 |  |
Currency effects and other, net | (812) | 220 | 0
Ending balance | 2,393 | 3,205 | 206
Long-term receivables |  |  |
Beginning balance, January 1, | 67,842 | 68,555 | 68,792
Currency effects and other, net | (146) | (34) | (237)
Ending balance, December 31, | 67,696 | 67,842 | 68,555
Adoption of ASU 2016-13 |  |  |
Trade receivables |  |  |
Beginning balance |  | 6,970 |
Ending balance |  |  | 6,970
Short-term contract assets |  |  |
Beginning balance |  | 2,779 |
Ending balance |  |  | 2,779
Long-term receivables |  |  |
Beginning balance, January 1, | $ 0 | (679) | 0
Ending balance, December 31, |  | $ 0 | $ (679)

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- Definition Amount of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123577603&loc=d3e5074-111524 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + Details
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