OTHER LONG-TERM LIABILITIES (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Long-term deferred rent	$ 5,458	$ 6,755
Long-term accrued restructuring	1,256	647
Long-term deferred compensation	5,464	7,309
Total long-term liabilities	$ 12,178	$ 14,711