ACQUISITION (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Business Acquisition [Line Items]
Number of acquisitions			1
Revenues	$ 632,383	$ 551,587	$ 1,283,742	$ 1,072,920
2020 Acquisition
Business Acquisition [Line Items]
Purchase price including contingent consideration	14,663		14,663
Contingent consideration fair value	4,042		4,042
Maximum amount of earnout payable	16,582		16,582
Intangible assets	6,300		6,300
Revenues	$ 1,190		$ 2,233