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, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Net income	$ 54,382	$ 46,855	$ 38,957	$ 36,548	$ 23,541	$ 16,882	$ 101,237	$ 40,423
Basic weighted average shares outstanding	34,736,639				35,189,260		34,854,357	35,326,401
Dilutive effect of unvested restricted stock	197,075				94,430		295,629	218,685
Diluted weighted shares outstanding	34,933,714				35,283,690		35,149,986	35,545,086
Earnings per common share
Basic	$ 1.57				$ 0.67		$ 2.90	$ 1.14
Diluted	$ 1.56				$ 0.67		$ 2.88	$ 1.14