SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND PRACTICES - Schedule of Rollforward Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2016 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 256,654
Acquisitions	36,720
Foreign currency adjustments	1,544
Balance at end of period	294,918
Team Qualspec
Goodwill [Roll Forward]
Balance at beginning of period	207,497
Acquisitions	0
Foreign currency adjustments	1,054
Balance at end of period	208,551
Team Furmanite
Goodwill [Roll Forward]
Balance at beginning of period	19,874
Acquisitions	36,720
Foreign currency adjustments	386
Balance at end of period	56,980
Quest Integrity
Goodwill [Roll Forward]
Balance at beginning of period	29,283
Acquisitions	0
Foreign currency adjustments	104
Balance at end of period	$ 29,387