COMMITMENTS AND CONTINGENCIES - Additional Information (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Right-of-use assets	$ 132,751	$ 126,444
Additional amount to be recognized at lease commencement for the lease liability	136,500	126,600
Operating lease liabilities, current portion	9,871	7,891
Operating lease liabilities, less current portion	$ 126,630	$ 118,665
Weighted average discount rate	6.83%
Weighted average lease term remaining on lease liabilities	9 years 2 months 12 days