RESTRUCTURING AND OTHER RELATED CHARGES - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges (credits), net	$ 1,676	$ 6,727	$ 2,651
OneTEAM Program
Restructuring Cost and Reserve [Line Items]
Professional fees	12,300	15,500
Restructuring and other related charges (credits), net	1,676	6,727	0
OneTEAM Program | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges (credits), net	1,676	6,700
Severance charges incurred to date	8,400
Furmanite Netherlands and Belgium Exit
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges (credits), net	0	0	(1,229)
Disposal gain	1,100		1,100
Other assets transferred			200
Furmanite Netherlands and Belgium Exit | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges (credits), net			(173)
Severance liabilities transferred to purchaser			1,601
Severance charges incurred to date	4,700
Furmanite Netherlands and Belgium Exit | Other Restructuring
Restructuring Cost and Reserve [Line Items]
Cash paid to purchaser of business			300
Furmanite Netherlands and Belgium Exit | Impairment Loss On Property, Plant And Equipment
Restructuring Cost and Reserve [Line Items]
Severance charges incurred to date	700
2017 Cost Savings Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges (credits), net	0	$ 0	3,880
2017 Cost Savings Initiative | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges (credits), net			$ 3,900
Severance charges incurred to date	$ 3,900