RESTRUCTURING - Schedule of Restructuring Liabilities (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Restructuring Reserve [Roll Forward]
Restructuring liabilities - beginning of period	$ 0	$ 23,939,000	$ 54,000	$ 0
Restructuring charges excluding non-cash items	21,708,000	1,532,000	21,708,000	25,471,000
Cash payments	(4,141,000)	(23,766,000)	(4,195,000)	(23,766,000)
Restructuring liabilities - end of period	17,567,000	1,705,000	17,567,000	1,705,000
Non-cash items, net	1,500,000		1,500,000	1,400,000
Stock-based compensation expense reversal	(57,013,000)	$ (71,376,000)	(120,709,000)	(125,195,000)
2024 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring liabilities - end of period	17,600,000		17,600,000
Accelerated stock-based compensation expense	3,200,000		3,200,000
2023 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring liabilities - end of period	0		0
Accelerated stock-based compensation expense				3,400,000
Unvested Restricted Stock Award | 2024 Restructuring Plan
Restructuring Reserve [Roll Forward]
Stock-based compensation expense reversal	$ 4,700,000		$ 4,700,000
Unvested Restricted Stock Award | 2023 Restructuring Plan
Restructuring Reserve [Roll Forward]
Stock-based compensation expense reversal				$ 4,800,000