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EARNINGS PER SHARE (Basic and Diluted) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Basic, numerator:
Net income	$ 14,788	$ 12,940	$ 23,158	$ 17,068
Effect of unvested restricted stock unit awards	(44)	(89)	(106)	(132)
Adjusted net income	$ 14,744	$ 12,851	$ 23,052	$ 16,936
Basic, denominator:
Weighted-average shares	25,671,535	25,724,550	25,699,306	25,779,166
Earnings per common share (in dollars per share)	$ 0.57	$ 0.50	$ 0.90	$ 0.66
Diluted, numerator:
Net income	$ 14,788	$ 12,940	$ 23,158	$ 17,068
Effect of unvested restricted stock unit awards	(43)	(87)	(104)	(131)
Adjusted net income	$ 14,745	$ 12,853	$ 23,054	$ 16,937
Diluted, denominator:
Weighted-average shares	25,671,535	25,724,550	25,699,306	25,779,166
Effect of dilutive securities	721,824	486,974	674,076	484,566
Adjusted weighted-average shares and assumed conversions	26,393,359	26,211,524	26,373,382	26,263,732
Earnings per common share (in dollars per share)	$ 0.56	$ 0.49	$ 0.87	$ 0.64

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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