EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Numerator for basic and diluted earnings per share:
Net income	$ 116,243	$ 102,292
Numerator for basic earnings per share	116,243	102,292
Numerator for diluted earnings per share	$ 116,243	$ 102,292
Denominator:
Weighted average common shares for basic earnings per share (in shares)	57,837	57,702
Net effect of dilutive stock options, restricted stock units, restricted stock awards and stock issuable under the ESPP (in shares)	1,094	1,596
Weighted average common shares for diluted earnings per share (in shares)	58,931	59,298
Net income per share:
Basic (in usd per share)	$ 2.01	$ 1.77
Diluted (in usd per share)	$ 1.97	$ 1.73
Anti-dilutive options not included in the calculation (in shares)	363	260