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Supplemental cash flow information (Tables) | 12 Months Ended
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Dec. 31, 2015
Supplemental Cash Flow Elements [Abstract] |
Supplemental Cash Flow Information | The table below provides supplemental cash flow information:
|  | Year ended December 31, |
|  | 2015 |  |  | 2014 |  |  | 2013 |
Cash paid: |  |  |  |  |  |  |  |  |  |  |  |
Income taxes |  | $ | 156,075 |  |  | $ | 238,615 |  |  | $ | 341,426 |
Interest |  |  | 405,120 |  |  |  | 351,967 |  |  |  | 405,030 |
Non-cash investing and financing activities: |  |  |  |  |  |  |  |  |  |  |  |
Fixed assets under capital lease obligations |  |  | 74,035 |  |  |  | 72,389 |  |  |  | 60,920 |

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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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