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ACCOUNTS AND OTHER RECEIVABLE, NET (Tables) | 3 Months Ended
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Mar. 31, 2022
ACCOUNTS AND OTHER RECEIVABLE, NET |
Schedule of accounts and other receivable | ​
​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | March 31, | ​ | December 31,
​ |  | 2022 |  | 2021
Amounts billed, net | ​ | $ | 233,034 | ​ | $ | 217,549
Unbilled receivables | ​ | ​ | 15,698 | ​ |  | 19,678
Total receivables, net | ​ | $ | 248,732 | ​ | $ | 237,227
Schedule of expected credit losses | ​
​ | ​ | ​ | ​
December 31, 2021 |  | $ | 5,784
Additions | ​ |  | 161
Foreign currency translation | ​ | ​ | 2
March 31, 2022 | ​ | $ | 5,947

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- Definition Tabular disclosure of allowance for credit loss on accounts receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=124255953&loc=SL82919249-210447 + Details
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- Definition Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3,4) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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