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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 2013
Supplemental Cash Flow Information | Supplemental cash flow information was as follows:
Years Ended December 31, |  | 2013 |  |  | 2012 |  |  | 2011 |
Interest paid |  | $ | 5,334 |  |  | $ | 2,802 |  |  | $ | 1,854 |
Income taxes net of refunds |  | $ | 73,168 |  |  | $ | 46,819 |  |  | $ | 45,137 |
Common stock issued for Carrier Enterprise III |  |  | — |  |  | $ | 93,250 |  |  |  | — |
Net assets of locations contributed to Carrier Enterprise II |  |  | — |  |  |  | — |  |  | $ | 14,769 |

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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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Namespace Prefix: | us-gaap_
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