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Accrued Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2019
Accrued Liabilities [Abstract] |
Carrying Value of Accrued Liabilities | The carrying values of accrued liabilities were as follows:
| December 31,
| 2019 |  | 2018
| (In thousands)
Wages, severance and related taxes | $ | 58,953 |  |  | $ | 46,674 |
Current deferred revenue | 54,255 |  |  | 62,272 |
Accrued rebates | 37,170 |  |  | 41,312 |
Accrued interest | 18,781 |  |  | 18,530 |
Employee benefits | 17,791 |  |  | 17,984 |
Lease liabilities | 14,072 |  |  | — |
Other (individual items less than 5% of total current liabilities) | 82,777 |  |  | 85,624 |
Accrued liabilities | $ | 283,799 |  |  | $ | 272,396 |

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