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BUSINESS ACQUISITION - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Business Combinations [Abstract] |  |  |
Total revenue | $ 272,427 | $ 832,710 | $ 792,672
Net income | $ 18,318 | $ 24,091 | $ 32,180
Basic income per share (in dollars per share) | $ 0.25 | $ 0.32 | $ 0.43

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