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EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share [Abstract]
Net income	$ 7,812	$ 4,211
Average number of basic common shares outstanding (in shares)	15,448,338	14,471,147
Plus: dilutive effect of stock options and awards outstanding (in shares)	104,631	120,126
Average number of diluted common shares outstanding (in shares)	15,552,969	14,591,273
Anti-dilutive options excluded from earnings calculation (in shares)	1,230	0
Earnings per share:
Basic (in dollars per share)	$ 0.51	$ 0.29
Diluted (in dollars per share)	$ 0.50	$ 0.29

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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