EARNINGS PER COMMON SHARE - Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator for basic and diluted earnings per share -income available to common shareholders:
Net income	$ 28,628	$ 45,839
Denominator for basic earnings per share - weighted average shares	97,736,690	97,926,088
Effect of dilutive securities -
Employee stock awards	619,524	510,223
Denominator for diluted earnings per share - adjusted weighted average shares	98,356,214	98,436,311
Basic	$ 0.29	$ 0.47
Diluted	$ 0.29	$ 0.47