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Other Long-Term Liabilities (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
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Other Long-Term Liabilities [Abstract] |  |
Contract liabilities, net of current portion | $ 20,315 | $ 21,033
Deferred rent and other facility costs | 6,957 | 7,113
Deferred payments related to acquisitions | 6,020 | 6,385
Loss on facilities not in use | 5,091 | 5,652
Lease incentives | 2,857 | 2,832
Total other long-term liabilities | $ 41,240 | $ 43,015

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- Definition Aggregated carrying amounts of obligations as of the balance sheet date, excluding long-term debt, incurred as part of the normal operations that are expected to be paid after one year or beyond the normal operating cycle, if longer. Alternate captions include Total Deferred Credits and Other Liabilities. + References No definition available. + Details
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