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ACCOUNTS RECEIVABLE AND SIGNIFICANT CLIENTS(NARRATIVE) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Entity Wide Revenue Major Customer Line Items
Revenue.	$ 588,726	$ 539,219
Revenue | Customer Concentration Risk | Minimum
Entity Wide Revenue Major Customer Line Items
Revenue.	$ 100,000
Revenue | Customer Concentration Risk | Financial Services Client
Entity Wide Revenue Major Customer Line Items
Concentration Risk, Customer	one	one
Concentration risk percentage	7.30%	15.70%
Revenue | Customer Concentration Risk | Automotive Industry Client
Entity Wide Revenue Major Customer Line Items
Concentration Risk, Customer	one	one
Concentration risk percentage	10.40%	8.80%

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- Definition

Description of risks that arise due to the volume of business transacted with a particular customer. At a minimum, the description informs financial statement users of the general nature of the risk, but excludes "Information about Major Customers" that may be disclosed elsewhere (for instance, segment disclosures).

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