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EARNING PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Earnings Per Share [Abstract]
Net income	$ 8,481	$ 7,721	$ 6,117	$ 7,281	$ 16,202	$ 13,398
Average number of basic common shares outstanding (in shares)	15,423,997		15,538,282		15,500,033	15,530,893
Plus: dilutive effect of stock options and awards outstanding (in shares)	17,281		47,299		22,960	51,340
Average number of diluted common shares outstanding (in shares)	15,441,278		15,585,581		15,522,993	15,582,233
Earnings Per Share, Basic and Diluted [Abstract]
Earnings Per Share, Basic	$ 0.55		$ 0.39		$ 1.05	$ 0.86
Earnings Per Share, Diluted	$ 0.55		$ 0.39		$ 1.04	$ 0.86

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