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Components of Basic and Diluted Earnings Per Share (Detail) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Numerator:
Net income	$ 3,071	$ 520
Denominator:
Weighted average shares outstanding-basic	29,737	29,288
Dilutive effect of stock options and grants	786	660
Weighted average shares outstanding-diluted	30,523	29,948

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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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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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