SEGMENT INFORMATION - Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment information
Operating income (loss)	$ 399,489	$ 414,146
Stock-based compensation expense	16,300	18,400
Corporate and Unallocated
Segment information
Operating income (loss)	(108,443)	(97,606)
Payroll costs	68,100	65,100
Stock-based compensation expense	16,200	18,300
Professional service expenses	26,400	20,400
Other operating expenses	$ 13,900	$ 12,100