RESTRUCTURING AND OTHER RELATED CHARGES - Additional Information (Details) - USD ($) $ in Thousands	7 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2017	Dec. 31, 2016	May 31, 2015
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges, net	$ 0	$ 2,651	$ 5,513	$ 0
Furmanite Netherlands and Belgium Exit
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges, net		(1,229)	5,513
Other assets transferred		200
Furmanite Netherlands and Belgium Exit | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges, net		(173)	4,846
Severance liabilities transferred to purchaser		1,601	0
Restructuring and Related Cost, Cost 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]
Restructuring and Related Cost, Cost Incurred to Date		700
2017 Cost Savings Initiative
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges, net		3,880	$ 0
2017 Cost Savings Initiative | Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring and other related charges, net		3,880
Restructuring and Related Cost, Cost Incurred to Date		$ 3,900