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ACQUISITIONS, DIVESTITURE AND PRO FORMA RESULTS (Pro Forma Financial Information Summarization Results of Operations) (Details) - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Business Combinations [Abstract] |  |  |
Total revenue from continuing operations | $ 1,428,491 | $ 1,446,903 | $ 940,005
Net income from continuing operations | $ 81,730 | $ 27,520 | $ 10,694
Net income from continuing operations per share: |  |  |
Basic earnings per share from continuing operations, Pro forma (in dollars per share) | $ 1.06 | $ 0.37 | $ 0.31

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