EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Basic EPS Calculation
Net income available for common stock	$ 231,232	$ 221,742	$ 206,434
Weighted Average Number of Shares Outstanding, Basic	55,600	54,207	53,575
Earnings Per Share, Basic	$ 4.16	$ 4.09	$ 3.85
Diluted EPS Calculation
Net Income (Loss) Available to Common Stockholders, Diluted	$ 231,232	$ 221,742	$ 206,434
Effect of dilutive securities on shares	260	131	99
Weighted Average Number of Shares Outstanding, Diluted	55,860	54,338	53,674
Earnings Per Share, Diluted	$ 4.14	$ 4.08	$ 3.85