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Other Non-Current Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2016
Other Liabilities Disclosure [Abstract] |
Composition of Other Non-Current Liabilities | The composition of other non-current liabilities was as follows:
|  | December 31 |
(In thousands) |  | 2016 |  |  | 2015 |
Deferred revenue |  | $ | 1,863 |  |  | $ | 2,988 |
Environmental and legal matters |  |  | 22,703 |  |  |  | 18,258 |
Deferred compensation liability |  |  | 53,133 |  |  |  | 43,042 |
Pension liability |  |  | 29,494 |  |  |  | 41,252 |
Other non-current liabilities |  |  | 12,160 |  |  |  | 9,221 |
Total other non-current liabilities |  | $ | 119,353 |  |  | $ | 114,761 |

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