ACCOUNTS RECEIVABLE AND SIGNIFICANT CLIENTS(NARRATIVE) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Entity Wide Revenue Major Customer Line Items
Revenue.	$ 592,453	$ 566,734	$ 1,785,429	$ 1,660,747
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
Concentration risk percentage			7.40%	13.30%
Revenue | Customer Concentration Risk | Automotive Industry Client
Entity Wide Revenue Major Customer Line Items
Concentration Risk, Customer			one
Concentration risk percentage			10.50%	9.10%