ACQUISITIONS - Additional Information (Detail) $ in Thousands		12 Months Ended
	Feb. 29, 2016 USD ($) shares	Dec. 31, 2016 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Business Acquisition [Line Items]
Goodwill		$ 355,786	$ 281,650	$ 284,804
Furmanite
Business Acquisition [Line Items]
Share conversion ratio from business combination	0.215
Fair value of consideration transferred	$ 282,341
Number of shares issued | shares	8,208,006
Intangible assets	$ 88,958
Goodwill	89,646
Expected amount of deductible goodwill	0
Fair value of accounts receivables acquired	65,900
Uncollectible amount	7,900
Gross contractual amount	88,000
Acquisition related costs		6,700
Revenues		216,000
Net income (loss)		(6,400)
Separately recognized acquisition costs expensed		$ 4,700
Cash payment to acquire business	70,811
Furmanite | Discontinued Operations, Held-for-sale
Business Acquisition [Line Items]
Intangible assets	1,600
Goodwill	3,300
Fair value of accounts receivables acquired	13,600
Acquired discontinued operations, amount by which current assets acquired were reduced for costs to sell	1,100
Furmanite | Customer relationships
Business Acquisition [Line Items]
Intangible assets	$ 69,800
Acquired intangible asset useful life	12 years
Furmanite | Trade names
Business Acquisition [Line Items]
Intangible assets	$ 16,900
Acquired intangible asset useful life	12 years
Furmanite | Developed Technology Rights
Business Acquisition [Line Items]
Intangible assets	$ 2,300
Acquired intangible asset useful life	10 years