EARNINGS PER SHARE (Computation of Basic and Diluted Earnings per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Basic
Net income per consolidated statements of income	$ 10,811	$ 6,057	$ 16,908	$ 14,588
Less: Earnings allocated to participating securities	(95)	(107)	(164)	(243)
Net income available to common stockholder	$ 10,716	$ 5,950	$ 16,744	$ 14,345
Weighted average common shares outstanding including participating securities	8,294,801	8,320,036	8,299,503	8,310,071
Less: Weighted average participating securities	(73,053)	(146,549)	(80,650)	(138,711)
Weighted average common shares outstanding	8,221,748	8,173,487	8,218,853	8,171,360
Basic earnings per common share (in dollars per share)	$ 1.30	$ 0.73	$ 2.04	$ 1.76
Diluted
Net income allocated to common shareholders	$ 10,716	$ 5,950	$ 16,744	$ 14,345
Weighted average common shares outstanding for basic earnings per common share	8,221,748	8,173,487	8,218,853	8,171,360
Average shares and dilutive potential common shares	8,359,450	8,336,064	8,391,514	8,320,866
Diluted earnings per common share (in dollars per share)	$ 1.28	$ 0.71	$ 2.00	$ 1.72
Stock Option
Diluted
Add: Dilutive effects of assumed exercise of stock options	74,597	126,491	108,905	121,022
Restricted stock
Calculations of basic and diluted earnings per share
Number of antidilutive shares not considered in computing diluted earnings per share	52,197		52,197
Diluted
Dilutive effects of assumed exercise of stock options/vesting of performance based restricted stock	63,105	36,086	63,756	28,484