ACQUISITIONS - Additional Information (Detail) $ in Thousands				7 Months Ended		12 Months Ended
	Feb. 29, 2016 USD ($) shares	Aug. 31, 2015 shares	Jul. 07, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	May 31, 2015 USD ($)
Business Acquisition [Line Items]
Goodwill				$ 256,654		$ 284,804	$ 355,786	$ 256,654
Net income (loss)				8,878	$ 23,932	(104,161)	(12,676)	25,446	$ 40,497
TeamQualspec
Business Acquisition [Line Items]
Goodwill				207,497		$ 194,211	213,475	$ 207,497
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				3,000			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
Qualspec Group
Business Acquisition [Line Items]
Fair value of consideration transferred			$ 255,500
Intangible assets			78,100
Goodwill			148,482
Expected amount of deductible goodwill			109,600
Fair value of accounts receivables acquired			21,500
Uncollectible amount			1,000
Gross contractual amount			$ 22,500
Revenues				79,300
Net income (loss)				$ 2,700
Ownership percentage acquired			100.00%
Qualspec Group | TeamQualspec
Business Acquisition [Line Items]
Goodwill			$ 148,500
Qualspec Group | Customer relationships
Business Acquisition [Line Items]
Intangible assets			$ 75,200
Acquired intangible asset useful life			15 years
Qualspec Group | Non-compete agreements
Business Acquisition [Line Items]
Intangible assets			$ 1,600
Acquired intangible asset useful life			5 years
Qualspec Group | Trade names
Business Acquisition [Line Items]
Intangible assets			$ 1,300
Acquired intangible asset useful life			1 year
Quest Integrity
Business Acquisition [Line Items]
Number of shares issued | shares		728,266