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AQUISITIONS AND DISCONTINUED OPERATIONS - Pro Forma Results (Details) - Cues, Inc. - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2018
Business Acquisition [Line Items] |  |
Revenues | $ 395.9 | $ 765.2
Income from continuing operations | 23.6 | 36.3
Net income | $ 26.9 | $ 39.6
Income from continuing operations per share of common stock, basic (USD per share) | $ 0.55 | $ 0.85
Income from continuing operations per share of common stock, diluted (USD per share) | 0.53 | 0.81
Net income per share of common stock, basic (USD per share) | 0.63 | 0.92
Net income per share of common stock, diluted (USD per Share) | $ 0.60 | $ 0.89

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