RESTRUCTURING AND OTHER RELATED CHARGES - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges (credits), net	$ 6,727	$ 2,651	$ 5,513
OneTEAM Program
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges (credits), net	6,727
OneTEAM Program | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges (credits), net	6,727
Severance charges incurred to date	6,700
Furmanite Netherlands and Belgium Exit
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges (credits), net		(1,229)	$ 5,513
Disposal gain		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		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