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Supplemental cash flow information (Tables) | 6 Months Ended
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Jun. 30, 2016
Supplemental Cash Flow Elements [Abstract] |
Supplemental cash flow information |
| Six months ended June 30,
| 2016 | 2015
Cash paid for: |  |
Interest | $ | 9,701 |  | $ | 9,388 |
Income taxes | 6,316 |  | 12,581 |
Non-cash investing activities: |  |
Accrued capital costs | $ | 179 |  | $ | 2,570 |

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- Definition Tabular disclosure of supplemental cash flow information for the periods presented. + References No definition available. + Details
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- References No definition available. + Details
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