OTHER LONG-TERM LIABILITIES (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Other Liabilities Disclosure [Abstract]
Long-term deferred rent	$ 7,216	$ 6,755
Long-term accrued restructuring	537	647
Income tax payable	2,711	0
Long-term deferred compensation	6,879	7,309
Total long-term liabilities	$ 17,343	$ 14,711