COMMITMENTS AND CONTINGENCIES - Additional Information (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Operating lease right-of-use assets	$ 129,837	$ 126,444
Additional amount to be recognized at lease commencement for the lease liability	134,700	126,600
Operating lease liability, current	10,746	7,891
Operating lease liability, noncurrent	$ 124,007	118,665
Operating lease, weighted average discount rate	6.83%
Operating lease, weighted average lease term remaining	8 years 11 months 12 days
Finance lease, right-of-use asset	$ 16,900	300
Finance lease liability	16,900	200
Finance lease liability, current	$ 4,000	32
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:OtherAssets
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent
Finance lease liability, noncurrent	$ 12,900	$ 200
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent
Finance lease, weighted average discount rate	5.87%
Finance lease, weighted average remaining lease term	3 years 10 months 9 days