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ACQUISITIONS - Pro Forma (Details)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 31, 2017
USD ($)
$ / shares
Business Combinations [Abstract]  
Revenue from services | $ $ 233,573
Net loss attributable to common shareholders | $ $ (874)
Net loss per share attributable to common shareholders - Basic (in dollars per share) | $ / shares $ (0.03)
Net loss per share attributable to common shareholders - Diluted (in dollars per share) | $ / shares $ (0.05)