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EARNINGS PER SHARE - Schedule of Earnings Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Earnings Per Share [Abstract]
Net income	$ 8,090	$ 6,628	$ 7,874
Weighted average shares outstanding - basic (in shares)	8,070	8,059	8,107
Dilutive effect of share-based compensation (in shares)	156	86	35
Weighted average shares outstanding - diluted (in shares)	8,226	8,145	8,142
Per share information:
Basic earnings per share (in dollars per share)	$ 1.00	$ 0.82	$ 0.97
Diluted earnings per share (in dollars per share)	$ 0.98	$ 0.81	$ 0.97

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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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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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