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Supplemental cash flow information | 12 Months Ended
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Dec. 31, 2014
Supplemental Cash Flow Information [Abstract] |
Supplemental cash flow information | Supplemental cash flow information
| Year Ended December 31,
| 2014 | 2013 | 2012
Cash paid for: |  |  |  |
Interest | $ | 19,066 |  | $ | 20,539 |  | $ | 20,212 |
Income/withholding taxes (1) | 12,189 |  | 28,654 |  | 41,455 |
Non-cash investing activities: |  |  |  |  |  |
Accrued capital costs | $ | 744 |  | $ | 9,409 |  | $ | (683 | )
(1) | We paid withholding taxes in Iceland on intercompany dividends of $5,491, $18,067 and $22,633 during the years ended December 31, 2014, 2013 and 2011, respectively. Our tax payments in Iceland for withholding taxes, income taxes and any associated refunds are denominated in ISK.

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- Definition The entire disclosure for supplemental cash flow activities, including cash, noncash, and part noncash transactions, for the period. Noncash is defined as information about all investing and financing activities of an enterprise during a period that affect recognized assets or liabilities but that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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