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Other Long-Term Liabilities (Tables) | 12 Months Ended
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Dec. 31, 2019
Other Liabilities, Noncurrent [Abstract] |
Schedule of Other Long-Term Liabilities | Other long-term liabilities consist of the following as of December 31, 2018 and 2019 (in thousands):
| 2018 |  | 2019
Contract liabilities, net of current portion | $ | 23,880 |  |  | $ | 30,925 |
Deferred payments related to acquisitions | 5,904 |  |  | 4,963 |
Deferred rent and other facility costs | 6,837 |  |  | 1,961 |
Employee separation costs | 6,800 |  |  | 1,838 |
Loss on facilities not in use | 4,332 |  |  | — |
Lease incentives | 2,300 |  |  | — |
Other | 1,263 |  |  | 1,764 |
Other long-term liabilities | $ | 51,316 |  |  | $ | 41,451 |

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