SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES AND PRACTICES - Schedule of Rollforward Goodwill (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($)
Goodwill [Roll Forward]
Balance at beginning of period	$ 355,786
Foreign currency adjustments	561
Balance at end of period	356,347
Team Qualspec
Goodwill [Roll Forward]
Balance at beginning of period	213,475
Foreign currency adjustments	214
Balance at end of period	213,689
Team Furmanite
Goodwill [Roll Forward]
Balance at beginning of period	109,059
Foreign currency adjustments	222
Balance at end of period	109,281
Quest Integrity
Goodwill [Roll Forward]
Balance at beginning of period	33,252
Foreign currency adjustments	125
Balance at end of period	$ 33,377