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Fair Value of Financial Instruments (Tables) | 6 Months Ended
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Jun. 30, 2018
Fair Value Disclosures [Abstract] |
Fair Value of Long-Term Debt | The carrying value of our remaining long-term debt reported in the accompanying condensed consolidated balance sheets approximates fair value as substantially all of such debt bears interest based on prevailing variable market rates currently available in the countries in which we have borrowings.
| June 30, 2018 |  | December 31, 2017
| Recorded Amount |  | Fair Value |  | Recorded Amount |  | Fair Value
| (In thousands)
Long-term debt | $ | 1,622,762 |  |  | $ | 1,674,541 |  |  | $ | 1,845,309 |  |  | $ | 1,949,638 |

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