EARNINGS PER SHARE (Basic and Diluted) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Basic, numerator:
Net income	$ 1,233	$ 15,777	$ 11,187	$ 8,370
Effect of unvested restricted stock unit awards	(4)	(65)	(31)	(50)
Adjusted net income	$ 1,229	$ 15,712	$ 11,156	$ 8,320
Basic, denominator:
Weighted-average shares	25,670,325	25,767,791	25,656,674	25,726,363
Earnings per common share (in dollars per share)	$ 0.05	$ 0.61	$ 0.43	$ 0.32
Diluted, numerator:
Net income	$ 1,233	$ 15,777	$ 11,187	$ 8,370
Effect of unvested restricted stock unit awards	(4)	(64)	(30)	(50)
Adjusted net income	$ 1,229	$ 15,713	$ 11,157	$ 8,320
Diluted, denominator:
Weighted-average shares	25,670,325	25,767,791	25,656,674	25,726,363
Effect of dilutive securities	1,029,224	523,850	996,608	652,073
Adjusted weighted-average shares and assumed conversions	26,699,549	26,291,641	26,653,282	26,378,436
Earnings per common share (in dollars per share)	$ 0.05	$ 0.60	$ 0.42	$ 0.32