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Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Numerator:
Net income	$ 6,835	$ 1,230	$ 12,479	$ 2,430
Denominator:
Weighted average common shares outstanding	16,455	16,312	16,388	16,237
Weighted average dilutive securities	137	191	167	239
Weighted average common shares outstanding, diluted	16,592	16,503	16,555	16,476
Income per common share, basic	$ 0.42	$ 0.08	$ 0.76	$ 0.15
Income per common share, diluted	$ 0.41	$ 0.07	$ 0.75	$ 0.15

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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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