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BUSINESS COMBINATIONS - Schedule of Unaudited Pro forma Combined Information (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 8 Months Ended | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2016 | Dec. 31, 2015 | Apr. 30, 2014
Business Combinations [Abstract] |  |  |  |
Revenue | $ 370,837 | $ 565,853 | $ 549,794 | $ 505,598
Operating income | 21,931 | 44,866 | 31,549 | 12,453
Net loss attributable to common stockholders | $ (6,141) | $ (6,896) | $ (13,158) | $ (22,964)
Basic net loss per common share attributable to common stockholders (in USD per share) | $ (0.15) | $ (0.17) | $ (0.32) | $ (0.58)
Basic and diluted weighted average shares outstanding (in shares) | 40,262 | 41,233 | 40,642 | 39,820

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