EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Basic
Net income, basic	$ 5,049	$ 8,938	$ 10,234	$ 16,455
Weighted average basic shares outstanding	21,751	21,700	21,738	21,692
Earnings per share (in dollars per share)	$ 0.23	$ 0.41	$ 0.47	$ 0.76
Diluted
Net income, diluted	$ 5,049	$ 8,938	$ 10,234	$ 16,455
Weighted average basic shares outstanding	21,751	21,700	21,738	21,692
Dilutive effect of stock-based awards (in shares)	139	90	136	76
Weighted average diluted shares outstanding	21,890	21,790	21,874	21,768
Earnings per share (in dollars per share)	$ 0.23	$ 0.41	$ 0.47	$ 0.76
Anti-dilutive shares excluded from calculation	115	251	113	304

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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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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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units 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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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders.

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Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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