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Supplemental cash flow information (Tables) | 12 Months Ended
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Dec. 31, 2015
Supplemental Cash Flow Information [Abstract] |
Summary of supplemental cash flow information |
| Year Ended December 31,
| 2015 |  | 2014 |  | 2013
Cash paid for: |  |  |  |  |  |
Interest | $ | 18,781 |  |  | $ | 19,066 |  |  | $ | 20,539 |
Income/withholding taxes (1) | 24,125 |  |  | 12,189 |  |  | 28,654 |
Non-cash investing activities: |  |  |  |  |  |  |  |
Accrued capital costs | $ | 777 |  |  | $ | 744 |  |  | $ | 9,409 |
(1) | We paid withholding taxes in Iceland on intercompany dividends of $8,388, $5,491 and $18,067 during the years ended December 31, 2015, 2014 and 2013, respectively. 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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