EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Computation of Basic and Diluted Shares
Net income	$ 5,368	$ 4,132	$ 21,338	$ 17,092
Weighted average shares outstanding - basic (shares)	8,402,697	8,171,809	8,359,088	8,136,350
Dilutive potential shares from unvested restricted shares (shares)	195,533	248,940	202,830	214,576
Weighted average shares outstanding - diluted (shares)	8,598,230	8,420,749	8,561,918	8,350,926
Earnings per share:
Basic (dollars per share)	$ 0.64	$ 0.51	$ 2.55	$ 2.10
Diluted (dollars per share)	$ 0.62	$ 0.49	$ 2.49	$ 2.05