STOCKHOLDERS’ EQUITY - Stock Repurchase Program (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Stock Repurchase Program, Increase (Decrease) [Roll Forward]
Amount available for repurchase - beginning of period	$ 191,659	$ 9,837	$ 86,831	$ 0
Additional amount authorized for repurchase	0	0	250,000	100,000
Amount repurchased at cost	(91,659)	0	(236,831)	(90,163)
Amount available for repurchase — end of period	$ 100,000	$ 9,837	$ 100,000	$ 9,837