EARNINGS PER SHARE (Details) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Jul. 31, 2020	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) $ / shares shares
Basic earnings per share:
Net income | $		$ 164,413	$ 71,176	$ 193,468
Weighted-average common shares		60,327,000	59,657,000	58,534,000
Basic earnings per share | $ / shares		$ 2.73	$ 1.19	$ 3.31
Diluted earnings per share:
Net income | $		$ 164,413	$ 71,176	$ 193,468
Weighted-average common shares		60,327,000	59,657,000	58,534,000
Effect of dilutive awards:
Employee stock plans		1,140,000	1,188,000	1,098,000
Diluted weighted-average common shares		61,467,000	60,845,000	59,632,000
Diluted earnings per share | $ / shares		$ 2.67	$ 1.17	$ 3.24
Stock split ratio	2
Stock awards excluded in the computation of diluted earnings per share		0	0	0