ENTITY WIDE DISCLOSURES - Segment Data for our Three Operating Segments (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Revenues	$ 336,440	$ 235,399	$ 587,294	$ 427,806
Operating income (loss)	14,008	22,034	6,628	29,733
Capital expenditures	10,388	10,768	21,968	18,416
Depreciation and amortization	12,870	6,070	22,893	11,760
Operating segments | Team Qualspec
Segment Reporting Information [Line Items]
Revenues	157,238	130,221	293,500	237,412
Operating income (loss)	16,677	18,331	24,621	28,706
Capital expenditures	2,222	4,418	5,211	6,686
Depreciation and amortization	5,051	2,257	10,105	4,397
Operating segments | Team Furmanite
Segment Reporting Information [Line Items]
Revenues	159,681	81,103	260,275	150,455
Operating income (loss)	11,982	9,451	19,021	13,892
Capital expenditures	3,154	2,142	6,131	3,192
Depreciation and amortization	6,020	2,067	9,344	3,912
Operating segments | Quest Integrity
Segment Reporting Information [Line Items]
Revenues	19,521	24,075	33,519	39,939
Operating income (loss)	3,221	6,742	2,464	8,005
Capital expenditures	263	583	894	1,291
Depreciation and amortization	1,284	1,446	2,566	2,881
Corporate and shared support services
Segment Reporting Information [Line Items]
Operating income (loss)	(17,872)	(12,490)	(39,478)	(20,870)
Capital expenditures	4,749	3,625	9,732	7,247
Depreciation and amortization	$ 515	$ 300	$ 878	$ 570