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Supplemental cash flow information (Tables) | 9 Months Ended
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Sep. 30, 2013
Supplemental Cash Flow Information [Abstract] |
Supplemental Cash Flow Information |
| Nine months ended September 30,
| 2013 | 2012
Cash paid for: |  |
Interest | $ | 11,293 |  | $ | 10,220 |
Income/withholding taxes (1) | 27,254 |  | 33,625 |
Non-cash investing activities: |  |
Accrued capital costs | $ | 4,034 |  | $ | 935 |
(1) | We paid withholding taxes in Iceland of $18,067 and $22,633 in the nine months ended September 30, 2013 and 2012, respectively. Our tax payments in Iceland for withholding taxes, income taxes and associated refunds are denominated in Icelandic kronur ("ISK"). We expect to receive refunds of the withholding tax payments in the fourth quarters of 2013 and 2014. See Note 18 Subsequent events for additional information about withholding tax refunds.

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