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OTHER LONG-TERM LIABILITIES Long-Term Liabilities (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Long-term deferred rent $ 0 $ 5,100 $ 5,122
Long-term accrued restructuring 125   188
Long-term deferred compensation 4,596   4,992
Other Accrued Liabilities, Noncurrent 360   0
Other long-term liabilities $ 5,081   $ 10,302