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Other Non-Current Liabilities | 12 Months Ended
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Dec. 31, 2020
Other Liabilities Disclosure [Abstract] |
Other Non-Current Liabilities | 15. Other Non-Current Liabilities The composition of other non-current liabilities was as follows:
|  | December 31 |
(In thousands) |  | 2020 |  |  | 2019 |
Deferred revenue |  | $ | 11,276 |  |  | $ | 891 |
Environmental and legal matters |  |  | 17,921 |  |  |  | 12,023 |
Deferred compensation liability |  |  | 51,508 |  |  |  | 49,835 |
Pension liability |  |  | 17,229 |  |  |  | 19,407 |
Other non-current liabilities |  |  | 16,359 |  |  |  | 14,024 |
Total other non-current liabilities |  | $ | 114,293 |  |  | $ | 96,180 |

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- Definition The entire disclosure for other liabilities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.20,24) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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