Components of Basic and Diluted Earnings Per Share (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Numerator:
Net income attributable to AVD	$ 51us-gaap_NetIncomeLoss	$ 2,159us-gaap_NetIncomeLoss
Denominator:
Weighted averages shares outstanding-basic	28,527	28,401
Dilutive effect of stock options and grants	312	487
Weighted average shares outstanding-assuming dilution	28,839	28,888

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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