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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2017
Supplemental Cash Flow Information [Abstract] |
Supplemental Information Related to Consolidated Statements of Cash Flows | Supplemental information related to the consolidated statements of cash flows is as follows (in thousands):
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Cash paid during the year for: |  |  |  |  |
Income taxes (net of refunds of $17,522, $9,270 and $7,333 in 2017, 2016 and 2015, respectively)(a) | $ | 320,222 |  |  | $ | 143,404 |  |  | $ | 162,408 |
Interest (net of capitalization) | $ | 61,243 |  |  | $ | 96,948 |  |  | $ | 153,271 |
Supplemental non-cash disclosures related to investing activities: |  |  |  |  |
Capital expenditures included in Accounts payable | $ | 89,188 |  |  | $ | 33,622 |  |  | $ | 45,826 |
(a) | Includes approximately $257 million of income taxes paid in 2017 from the gain on sale of the Chemetall Surface Treatment business and approximately $111 million of income taxes paid in 2015 on repatriation of earnings from legacy Rockwood entities.

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