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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Earnings Per Share [Abstract]
Net income	$ 9,480	$ 7,721
Average number of basic common shares outstanding (in shares)	14,933,554	15,558,132
Plus: dilutive effect of stock options and awards outstanding (in shares)	73,161	34,463
Average number of diluted common shares outstanding (in shares)	15,006,715	15,592,595
Earnings per share:
Basic (in dollars per share)	$ 0.63	$ 0.50
Diluted (in dollars per share)	$ 0.63	$ 0.50

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