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, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Numerator for basic and diluted earnings per share -income available to common shareholders:
Net income	$ 55,705	$ 60,012	$ 148,526	$ 158,215
Denominator for basic earnings per share - weighted average shares	93,582,250	94,289,097	93,507,831	95,752,759
Effect of dilutive securities -
Employee stock awards	1,211,516	854,833	996,622	864,841
Denominator for diluted earnings per share - adjusted weighted average shares	94,793,766	95,143,930	94,504,453	96,617,600
Basic	$ 0.60	$ 0.64	$ 1.59	$ 1.65
Diluted	$ 0.59	$ 0.63	$ 1.57	$ 1.64