OTHER LONG-TERM LIABILITIES (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Long-term deferred rent	$ 7,643	$ 6,755
Long-term accrued restructuring	568	647
Income tax payable	1,543	0
Long-term deferred compensation	6,425	7,309
Total long-term liabilities	$ 16,179	$ 14,711