EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Numerator for basic and diluted earnings per share:
Net income	$ 88,026	$ 73,482	$ 98,645	$ 116,243	$ 161,508	$ 214,888
Numerator for basic earnings per share	88,026		98,645		161,508	214,888
Numerator for diluted earnings per share	$ 88,026		$ 98,645		$ 161,508	$ 214,888
Denominator:
Weighted average common shares for basic earnings per share (in shares)	56,319		57,594		56,548	57,716
Net effect of dilutive stock options, restricted stock units, restricted stock awards and stock issuable under the ESPP (in shares)	217		555		350	824
Weighted average common shares for diluted earnings per share (in shares)	56,536		58,149		56,898	58,540
Net income per share:
Basic (in usd per share)	$ 1.56		$ 1.71		$ 2.86	$ 3.72
Diluted (in usd per share)	$ 1.56		$ 1.70		$ 2.84	$ 3.67
Anti-dilutive options not included in the calculation (in shares)	1,409		1,379		1,199	871