A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.

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RESTRUCTURING AND OTHER RELATED CHARGES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges, net	$ 319	$ 228	$ 3,365	$ 436
OneTEAM Program
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges, net	319	228	3,365	436
Professional fees	600	3,800	2,600	9,800
OneTEAM Program \| Severance and related costs
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges, net			3,365
Severance charges incurred cumulatively to date	11,800		11,800
OneTEAM Program \| Elimination of employee positions
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges, net	300		3,400
IHT \| OneTEAM Program \| Severance and related costs \| Operating segments
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges, net	77	0	922	128
MS \| OneTEAM Program \| Severance and related costs \| Operating segments
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges, net	242	0	1,926	117
Quest Integrity \| OneTEAM Program \| Severance and related costs \| Operating segments
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges, net	0	62	0	62
Corporate and shared support services \| OneTEAM Program \| Severance and related costs \| Operating segments
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges, net	$ 0	$ 166	$ 517	$ 129