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Acquisitions (Tables) | 12 Months Ended
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Dec. 31, 2017
Rockwood Holdings, Inc. |
Business Acquisition [Line Items] |
Business Acquisition, Pro Forma Information | The following unaudited pro forma results of operations of the Company for the year ended December 31, 2015 assume that the Merger occurred on January 1, 2014. The pro forma amounts include certain adjustments, including interest expense, depreciation, amortization expense and income taxes. The pro forma amounts for the year ended December 31, 2015 were adjusted to exclude approximately $137.7 million of nonrecurring acquisition and integration related costs. Additionally, pro forma amounts for the year ended December 31, 2015 were adjusted to exclude approximately $103.4 million of charges related to the utilization of the inventory markup as further described in Note 24, “Segment and Geographic Area Information.” The pro forma results do not include adjustments related to cost savings or other synergies anticipated as a result of the Merger. In addition, pro forma amounts are not adjusted to reflect the Chemetall Surface Treatment business as discontinued operations. Accordingly, these unaudited pro forma results are presented for informational purposes only and are not necessarily indicative of what the actual results of operations of the combined company would have been if the acquisition had occurred as of January 1, 2014, nor are they indicative of future results of operations.
| Year Ended
| December 31, 2015
| (in thousands, except per share amounts)
Pro forma Net sales | $ | 3,684,665 |
Pro forma Net income | $ | 527,997 |
Pro forma Net income per share: |
Basic | $ | 4.75 |
Diluted | $ | 4.73 |

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