EARNINGS PER SHARE (Basic and Diluted) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Basic, numerator:
Net income	$ 15,777	$ 10,231	$ 8,370	$ 4,128
Effect of unvested restricted stock unit awards	(65)	(81)	(50)	(38)
Adjusted net income	$ 15,712	$ 10,150	$ 8,320	$ 4,090
Basic, denominator:
Weighted-average shares	25,767,791	25,791,026	25,726,363	25,806,774
Earnings per common share (in dollars per share)	$ 0.61	$ 0.39	$ 0.32	$ 0.16
Diluted, numerator:
Net income	$ 15,777	$ 10,231	$ 8,370	$ 4,128
Effect of unvested restricted stock unit awards	(64)	(80)	(50)	(38)
Adjusted net income	$ 15,713	$ 10,151	$ 8,320	$ 4,090
Diluted, denominator:
Weighted-average shares	25,767,791	25,791,026	25,726,363	25,806,774
Effect of dilutive securities	523,850	455,842	652,073	488,909
Adjusted weighted-average shares and assumed conversions	26,291,641	26,246,868	26,378,436	26,295,683
Earnings per common share (in dollars per share)	$ 0.60	$ 0.39	$ 0.32	$ 0.16