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Acquisition - Pro forma information (Details) - Dispensing Systems [Member] - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Business Acquisition [Line Items] |  |  |  |
Business acquisition, pro forma revenue | $ 1,266,930 | $ 1,272,237 | $ 3,247,728 | $ 3,235,248
Business acquisition, pro forma net income | $ 72,964 | $ 71,933 | $ 153,482 | $ 120,251
Business acquisition, pro forma earnings per share, basic (in dollars per share) | $ 0.66 | $ 0.60 | $ 1.39 | $ 0.99
Business acquisition, pro forma earnings per share, diluted (in dollars per share) | $ 0.65 | $ 0.59 | $ 1.38 | $ 0.99

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