LEASES - Additional Information (Details) - USD ($)	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Apr. 02, 2018
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset	$ 45,053,000		$ 0
Operating lease, liability	57,775,000
Liabilities, current	(130,360,000)		$ (141,310,000)
Finance lease, right-of-use asset	14,400,000
Secured Debt | Morgan Stanley Senior Funding, Inc.
Lessee, Lease, Description [Line Items]
Face amount				$ 980,000,000.0
Secured Debt | Morgan Stanley Senior Funding, Inc. | Line of Credit
Lessee, Lease, Description [Line Items]
Face amount	$ 1,000,000.0
Minimum
Lessee, Lease, Description [Line Items]
Term of contract	1 year
Maximum
Lessee, Lease, Description [Line Items]
Term of contract	10 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset		$ 34,800,000
Operating lease, liability		40,500,000
Liabilities, current		2,100,000
Liabilities, noncurrent		$ 3,600,000