CALCULATION OF WEIGHTED AVERAGE SHARES OUTSTANDING FOR EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended						6 Months Ended
	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021
Earnings Per Share [Abstract]
Net income	$ 47,965	$ 43,963	$ 49,927	$ 49,884	$ 54,382	$ 46,855	$ 91,928	$ 101,237
Basic weighted average shares outstanding	34,307,001				34,736,639		34,303,889	34,854,357
Dilutive effect of unvested restricted stock	144,739				197,075		229,046	295,629
Diluted weighted shares outstanding	34,451,740				34,933,714		34,532,935	35,149,986
Earnings per common share
Basic	$ 1.40				$ 1.57		$ 2.68	$ 2.90
Diluted	$ 1.39				$ 1.56		$ 2.66	$ 2.88