SHAREHOLDERS’ EQUITY AND EARNINGS PER COMMON SHARE - Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Equity [Abstract]
Net income	$ 6,609	$ 8,617	$ 6,556	$ 4,211	$ 2,584	$ 3,632	$ 4,311	$ 4,406	$ 25,993	$ 14,933	$ 15,153
Average number of basic common shares outstanding	15,437,000	15,420,000	15,393,000	14,471,000	9,096,000	9,064,000	9,032,000	9,014,000	15,183,615	9,068,624	8,970,368
Plus: dilutive effect of stock options and awards outstanding									106,795	74,029	120,018
Average number of diluted common shares outstanding	15,537,000	15,511,000	15,506,000	14,591,000	9,215,000	9,162,000	9,129,000	9,122,000	15,290,410	9,142,653	9,090,386
Anti-dilutive options excluded from earnings calculation									8,659	90,249	129,198
Earnings Per Share, Basic and Diluted [Abstract]
Basic (in dollars per share)	$ 0.43	$ 0.56	$ 0.43	$ 0.29	$ 0.28	$ 0.40	$ 0.48	$ 0.49	$ 1.71	$ 1.65	$ 1.69
Diluted (in dollars per share)	$ 0.43	$ 0.56	$ 0.42	$ 0.29	$ 0.28	$ 0.40	$ 0.47	$ 0.48	$ 1.70	$ 1.63	$ 1.67