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ACQUISITIONS - Summary of Pro Forma Consolidated Results of Operations (Details)
$ / shares in Units, $ in Thousands
6 Months Ended
Jun. 30, 2016
USD ($)
$ / shares
Business Acquisition [Line Items]  
Revenues | $ $ 631,064
Income from continuing operations | $ $ 2,587
Earnings per share from continuing operations:  
Basic (in usd per share) | $ / shares $ 0.09
Diluted (in usd per share) | $ / shares $ 0.09