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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 | Supplemental cash flow information was as follows:
| Six months ended June 30,
| 2016 |  | 2015
| (In thousands)
Interest paid | $ | 71,141 |  |  | 69,681 |
Income taxes paid | 10,233 |  |  | 9,970 |
Changes in accounts payable related to purchases of revenue earning equipment | (105,480 | ) |  | 124,766 |
Operating and revenue earning equipment acquired under capital leases | 777 |  |  | 5,847 |

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