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Supplemental cash flow information (Tables) | 12 Months Ended
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Dec. 31, 2017
Supplemental Cash Flow Information [Abstract] |
Summary of supplemental cash flow information |
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
Cash paid for: |  |  |  |  |  |
Interest | $ | 19,529 |  |  | $ | 19,511 |  |  | $ | 18,781 |
Income/withholding taxes, net (1) | 5,561 |  |  | 13,904 |  |  | 24,125 |
Non-cash investing and financing activities: |  |  |  |  |  |  |
Accrued capital costs | $ | 553 |  |  | $ | 3,018 |  |  | $ | 777 |
(1) | We paid withholding taxes in Iceland on intercompany dividends of $8,388 during the year ended December 31, 2015 (there were none for the years ended December 31, 2017 and 2016). Such withholding taxes are then refunded to us in the following year.

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- References No definition available. + Details
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