SEGMENT AND GEOGRAPHIC DISCLOSURES - Segment Data for our Three Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended									7 Months Ended		12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017		Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2017		Dec. 31, 2016	Dec. 31, 2015	May 31, 2015
Segment Reporting Information [Line Items]
Revenues	$ 316,334	$ 285,067		$ 312,256	$ 286,554	$ 319,825	$ 289,577	$ 336,440	$ 250,854	$ 571,718	$ 487,408	$ 1,200,211		$ 1,196,696	$ 926,356	$ 842,047
Operating income (loss)	$ (2,213)	$ (94,116)	[1]	$ (6,693)	$ (12,088)	$ (5,703)	$ (4,043)	$ 14,008	$ (7,380)	19,162	$ 40,083	(115,110)		(3,118)	$ 47,291	68,465
Capital expenditures										25,802		36,798		45,843		28,769
Depreciation and amortization										19,426		52,143		48,673		22,787
Operating Segments | TeamQualspec
Segment Reporting Information [Line Items]
Revenues										351,949		588,441		589,478		467,099
Operating income (loss)										31,175		11,128	[2]	43,367		60,198
Capital expenditures										6,557		10,505		8,803		10,276
Depreciation and amortization										10,568		19,279		19,853		8,413
Operating Segments | TeamFurmanite
Segment Reporting Information [Line Items]
Revenues										178,238		529,973		539,627		300,456
Operating income (loss)										14,335		(33,993)	[2]	27,283		28,713
Capital expenditures										5,656		17,791		15,077		4,916
Depreciation and amortization										4,779		23,412		21,387		7,583
Operating Segments | Quest Integrity
Segment Reporting Information [Line Items]
Revenues										41,531		81,797		67,591		74,492
Operating income (loss)										5,491		12,337		4,780		13,196
Capital expenditures										1,993		3,316		2,007		2,961
Depreciation and amortization										3,403		4,423		5,323		5,704
Corporate and shared support services
Segment Reporting Information [Line Items]
Operating income (loss)										(31,839)		(104,582)		(78,548)		(33,642)
Capital expenditures										11,596		5,186		19,956		10,616
Depreciation and amortization										$ 676		$ 5,029		$ 2,110		$ 1,087

[1] Includes a goodwill impairment loss of $75.2 million in the third quarter of 2017.

[2] Includes goodwill impairment loss of $21.1 million and $54.1 million for TeamQualspec and TeamFurmanite, respectively, for the year ended December 31, 2017.