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Supplemental Cash Flow Information (Tables) | 6 Months Ended
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Jun. 30, 2015
Supplemental Cash Flow Elements [Abstract] |
Additional Information Relating to Cash Flow Activities | The following provides additional information relating to cash flow activities:
|  | Six Months Ended June 30, |
|  | 2015 |  |  | 2014 |
|  | (In Thousands) |
Cash refunds for income taxes, net |  | $ | (3,878 | ) |  | $ | (5,564 | )
Noncash investing and financing activities: |  |  |  |  |  |  |  |
Accounts payable, accrued liabilities and long-term debt associated with additions of property, plant and equipment |  | $ | 64,640 |  |  | $ | 24,841 |
Long-term debt associated with additions of capitalized internal-use software and software development |  | $ | 2,251 |  |  | $ | 2,601 |

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