ENTITY WIDE DISCLOSURES - Segment Data for our Three Operating Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								7 Months Ended		12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	May 31, 2015	May 31, 2014
Segment Reporting Information [Line Items]
Revenues	$ 319,825	$ 289,577	$ 336,440	$ 250,854	$ 254,998	$ 243,552	$ 235,399	$ 192,407	$ 571,718	$ 487,408	$ 1,196,696	$ 926,356	$ 842,047	$ 749,527
Operating income (loss)	$ (5,703)	$ (4,043)	$ 14,008	$ (7,380)	$ 10,701	$ 6,857	$ 22,034	$ 7,699	19,162	$ 40,083	(3,118)	$ 47,291	68,465	53,421
Capital expenditures									25,802		45,843		28,769	33,016
Depreciation and amortization									19,426		48,673		22,787	21,468
TeamQualspec
Segment Reporting Information [Line Items]
Revenues									351,949		589,478		467,099	408,259
TeamFurmanite
Segment Reporting Information [Line Items]
Revenues									178,238		539,627		300,456	275,322
Quest Integrity
Segment Reporting Information [Line Items]
Revenues									41,531		67,591		74,492	65,946
Operating Segments | TeamQualspec
Segment Reporting Information [Line Items]
Operating income (loss)									31,175		43,367		60,198	47,787
Capital expenditures									6,557		8,803		10,276	8,104
Depreciation and amortization									10,568		19,853		8,413	7,953
Operating Segments | TeamFurmanite
Segment Reporting Information [Line Items]
Operating income (loss)									14,335		27,283		28,713	26,177
Capital expenditures									5,656		15,077		4,916	6,114
Depreciation and amortization									4,779		21,387		7,583	7,208
Operating Segments | Quest Integrity
Segment Reporting Information [Line Items]
Operating income (loss)									5,491		4,780		13,196	9,260
Capital expenditures									1,993		2,007		2,961	4,366
Depreciation and amortization									3,403		5,323		5,704	5,475
Corporate and shared support services
Segment Reporting Information [Line Items]
Operating income (loss)									(31,839)		(78,548)		(33,642)	(29,803)
Capital expenditures									11,596		19,956		10,616	14,432
Depreciation and amortization									$ 676		$ 2,110		$ 1,087	$ 832