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Components of Basic and Diluted Earnings Per Share (Detail) - USD ($) 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 attributable to AVD	$ 5,599	$ 4,304	$ 10,254	$ 7,756
Denominator:
Weighted average shares outstanding—basic	29,330	29,050	29,309	28,999
Dilutive effect of stock options and grants	860	555	804	562
Weighted average shares outstanding-assuming dilution	30,190	29,605	30,113	29,561

X

- Definition

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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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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