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Other Long-Term Liabilities (Tables) | 9 Months Ended
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Sep. 30, 2021
Other Liabilities Disclosure [Abstract] |
Schedule of Other Long-Term Liabilities | Other long-term liabilities consisted of the following (in thousands):
| September 30, 2021 |  | December 31, 2020
Deferred compensation plan | $ | 38,749 |  |  | $ | 34,501 |
Supplemental executive retirement plan (1) | — |  |  | 20,628 |
Operating lease liabilities | 12,712 |  |  | 14,692 |
Interest rate swap derivative instruments | 296 |  |  | 1,774 |
Other long-term liabilities (2) | 19,321 |  |  | 19,353 |
Total Other long-term liabilities | $ | 71,078 |  |  | $ | 90,948 |
(1) The Company terminated its supplemental executive retirement plan on April 30, 2021 and expects to pay out the obligation in July 2022. The obligation, as of September 30, 2021, is included as part of Accrued liabilities under Current Liabilities in Note G - Current Liabilities, above. (2) As a result of the application of the Coronavirus Aid, Relief and Economic Security Act (the “CARES Act”), we have approxima tely $19.3 million in payroll tax deferrals recorded within Other long-term liabilities as of September 30, 2021 and December 31, 2020 (expected to be paid by December 31, 2022).

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- Definition Tabular disclosure of other noncurrent liabilities. + References No definition available. + Details
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