DERIVATIVE CONTRACTS AND COLLATERALIZED INDEBTEDNESS - Settlements of Collateralized Indebtedness (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended
	Jan. 31, 2021	Mar. 31, 2021	Mar. 31, 2020
Derivative [Line Items]
Number of shares (in shares)	5,337,750
Notes Payable that will be reclassed to collateralized debt upon maturity		$ 59,451
Proceeds from Issuance of Secured Debt		185,105	$ 0
Comcast Synthetic Monetization Closeout
Derivative [Line Items]
Proceeds from Issuance of Secured Debt		$ 185,102