ACCRUED EXPENSES (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
ACCRUED EXPENSES [Abstract]
Accrued compensation and benefits	$ 6,526	$ 5,787
Accrued rent and real estate taxes	1,928	3,251
Other accrued expenses	3,703	4,827
Accrued expenses	$ 12,157	$ 13,865