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ACCOUNTS RECEIVABLE AND SIGNIFICANT CLIENTS (Tables) | 12 Months Ended
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Dec. 31, 2021
ACCOUNTS RECEIVABLE AND SIGNIFICANT CLIENTS [Abstract] |
Schedule of Accounts Receivable | Accounts receivable, net in the accompanying Consolidated Balance Sheets consists of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |
​ |  | 2021 |  | 2020 |
Accounts receivable | ​ | $ | 362,719 | ​ | $ | 383,464 | ​
Less: Allowance for credit losses | ​ |  | (5,409) | ​ |  | (5,067) | ​
Accounts receivable, net | ​ | $ | 357,310 | ​ | $ | 378,397 | ​
Schedule of Change in Allowance for Doubtful Accounts | Activity in the Company’s Allowance for credit losses consists of the following (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | December 31, |
​ |  | 2021 |  | 2020 |  | 2019 |
Balance, beginning of year | ​ | $ | 5,067 | ​ | $ | 5,452 | ​ | $ | 5,592 | ​
Provision for credit losses | ​ |  | (350) | ​ |  | 494 | ​ |  | 1,711 | ​
Uncollectible receivables written-off | ​ |  | (281) | ​ |  | (880) | ​ |  | (1,311) | ​
Effect of foreign currency and other | ​ | ​ | (15) | ​ | ​ | 1 | ​ | ​ | (540) | ​
Acquisition | ​ |  | 988 | ​ |  | — | ​ |  | — | ​
Balance, end of year | ​ | $ | 5,409 | ​ | $ | 5,067 | ​ | $ | 5,452 | ​
Schedule of Revenue from Significant Clients | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, |
​ |  | 2021 | ​ | 2020 | ​ | 2019 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financial services client | ​ | 12 | % | ​ | 13 | % | ​ | 3 | % | ​
Schedule of Accounts Receivable Outstanding from Significant Clients | Accounts receivable from this client was as follows (in thousands): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Year Ended December 31, |
​ |  | 2021 |  | 2020 |  | 2019 |
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Financial services client | ​ | $ | 15,483 | ​ | $ | 58,960 | ​ | $ | 4,321 | ​

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- Definition Tabular disclosure of the accounts receivable balances by significant customer. + References No definition available. + Details
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- Definition Tabular disclosure of allowance for credit loss on financing receivable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 11B -URI http://asc.fasb.org/extlink&oid=123577603&loc=SL6953423-111524 Reference 2: 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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- Definition Tabular disclosure of the extent of the entity's reliance on its major customers, if revenues from transactions with a single external customer amount to 10 percent or more of entity revenues, including the disclosure of that fact, the total amount of revenues from each such customer, and the identity of the reportable segment or segments reporting the revenues. The entity need not disclose the identity of a major customer or the amount of revenues that each segment reports from that customer. For these purposes, a group of companies known to the entity to be under common control is considered a single customer, and the federal government, a state government, a local government such as a county or municipality, or a foreign government is each considered a single customer. + References No definition available. + Details
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