EARNINGS PER COMMON SHARE - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Numerator for basic and diluted earnings per share -income available to common shareholders:
Net income	$ 63,061	$ 55,705	$ 199,131	$ 148,526
Denominator for basic earnings per share - weighted average shares	94,030,275	93,582,250	93,896,716	93,507,831
Effect of dilutive securities -
Employee stock awards	1,095,994	1,211,516	1,189,155	996,622
Denominator for diluted earnings per share - adjusted weighted average shares	95,126,269	94,793,766	95,085,871	94,504,453
Basic	$ 0.67	$ 0.60	$ 2.12	$ 1.59
Diluted	$ 0.66	$ 0.59	$ 2.09	$ 1.57