REVENUE - Contract Assets and Contract Liabilities (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Contract asset (current)	$ 14,787	$ 16,878
Increase / (decrease) in contract asset (current)	(2,091)
Contract liability (current)	94,667	86,340
Increase / (decrease) in contract liability (current)	8,327
Contract liability (long-term)	20,254	$ 21,905
Increase / (decrease) in contract liability (long-term)	(1,651)
Revenue recognized previously included in current contract liabilities	51,600
Revenue recognized previously included in current contract liabilities at the beginning of the year	$ 33,200