EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income (Numerator)
Income available to common stockholders, basic	$ 244,097	$ 214,040	$ 242,202
Income available to common stockholders, diluted	$ 244,097	$ 214,040	$ 242,202
Shares (Denominator)
Basic (in shares)	65,663	64,418	63,574
Total average equivalent shares (in shares)	67,682	66,657	66,150
Per Share Amount
Net income per share, basic (in dollars per share)	$ 3.72	$ 3.32	$ 3.81
Net income per share, diluted (in dollars per share)	$ 3.61	$ 3.21	$ 3.66
Stock options
Shares (Denominator)
Effect of dilutive stock based compensation (in shares)	1,600	1,800	2,344
Restricted stock
Shares (Denominator)
Effect of dilutive stock based compensation (in shares)	419	439	232