LEASES - Balance Sheet Information (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Operating lease, liability, current, statement of financial position [Extensible Enumeration]	Other current liabilities
Operating lease, liability, noncurrent, statement of financial position [Extensible Enumeration]	Other long-term liabilities
Finance lease, right-of-use asset, statement of financial position [Extensible Enumeration]	Property, plant and equipment, net
Operating leases:
Operating lease right-of-use assets	$ 143,782	$ 0
Operating lease liabilities, current portion	14,611	0
Long-term portion of lease obligations	169,433	0
Total operating lease liabilities	184,044
Finance leases:
Total finance lease assets	7,825
Finance lease liabilities, current portion	3,268	0
Long-term portion of lease obligations	4,687	$ 0
Total finance lease liabilities	$ 7,955