EARNINGS PER SHARE - Reconciliation of Basic and Diluted Earnings Per Share Computations (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator for basic and diluted earnings per share:
Net income, basic	$ 115,766	$ 148,157	$ 188,167	$ 193,471
Net income, diluted	$ 115,766	$ 148,157	$ 188,167	$ 193,471
Denominator:
Weighted-average basic shares outstanding (in shares)	54,092	54,318	54,084	54,362
Dilutive effect of outstanding stock awards (in shares)	356	279	338	277
Dilutive shares outstanding (in shares)	54,448	54,597	54,422	54,639
Basic earnings per share (in dollars per share)	$ 2.14	$ 2.73	$ 3.48	$ 3.56
Diluted earnings per share (in dollars per share)	$ 2.13	$ 2.71	$ 3.46	$ 3.54