OTHER LONG-TERM LIABILITIES (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Long-term deferred rent	$ 5,793	$ 6,755
Long-term accrued restructuring	1,513	647
Long-term deferred compensation	6,286	7,309
Total long-term liabilities	$ 13,592	$ 14,711