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Other Non-Current Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2019
Other Liabilities Disclosure [Abstract] |
Composition of Other Non-Current Liabilities | The composition of other non-current liabilities was as follows:
|  | December 31 |
(In thousands) |  | 2019 |  |  | 2018 |
Deferred revenue |  | $ | 891 |  |  | $ | 1,215 |
Environmental and legal matters |  |  | 12,023 |  |  |  | 20,404 |
Deferred compensation liability |  |  | 49,835 |  |  |  | 43,819 |
Pension liability |  |  | 19,407 |  |  |  | 26,722 |
Other non-current liabilities |  |  | 14,024 |  |  |  | 11,704 |
Total other non-current liabilities |  | $ | 96,180 |  |  | $ | 103,864 |

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