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Summary of Business Sales Segmentation as per Product (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Sales:
Total crop									$ 267,710us-gaap_SalesRevenueGoodsNet	$ 346,514us-gaap_SalesRevenueGoodsNet	$ 329,540us-gaap_SalesRevenueGoodsNet
Non-crop									30,924avd_SalesOfNonCropProducts	34,507avd_SalesOfNonCropProducts	36,650avd_SalesOfNonCropProducts
Net sales	77,591us-gaap_SalesRevenueNet	71,635us-gaap_SalesRevenueNet	68,313us-gaap_SalesRevenueNet	81,095us-gaap_SalesRevenueNet	75,522us-gaap_SalesRevenueNet	97,201us-gaap_SalesRevenueNet	86,761us-gaap_SalesRevenueNet	121,537us-gaap_SalesRevenueNet	298,634us-gaap_SalesRevenueNet	381,021us-gaap_SalesRevenueNet	366,190us-gaap_SalesRevenueNet
Gross profit	31,238us-gaap_GrossProfit	28,293us-gaap_GrossProfit	26,060us-gaap_GrossProfit	28,905us-gaap_GrossProfit	32,341us-gaap_GrossProfit	43,159us-gaap_GrossProfit	42,066us-gaap_GrossProfit	53,781us-gaap_GrossProfit	114,496us-gaap_GrossProfit	171,347us-gaap_GrossProfit	161,125us-gaap_GrossProfit
Crop
Net Sales:
Gross profit									101,633us-gaap_GrossProfit / us-gaap_MajorCustomersAxis = avd_SegmentOneMember	155,275us-gaap_GrossProfit / us-gaap_MajorCustomersAxis = avd_SegmentOneMember	142,019us-gaap_GrossProfit / us-gaap_MajorCustomersAxis = avd_SegmentOneMember
Non-crop
Net Sales:
Gross profit									12,863us-gaap_GrossProfit / us-gaap_MajorCustomersAxis = avd_SegmentTwoMember	16,072us-gaap_GrossProfit / us-gaap_MajorCustomersAxis = avd_SegmentTwoMember	19,106us-gaap_GrossProfit / us-gaap_MajorCustomersAxis = avd_SegmentTwoMember
Insecticides
Net Sales:
Total crop									135,705us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = avd_AmountOfInsecticidesSoldMember	193,623us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = avd_AmountOfInsecticidesSoldMember	194,060us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = avd_AmountOfInsecticidesSoldMember
Herbicides/Soil Fumigants/Fungicides
Net Sales:
Total crop									101,785us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = avd_AmountOfHerbicidesSoldMember	121,042us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = avd_AmountOfHerbicidesSoldMember	89,899us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = avd_AmountOfHerbicidesSoldMember
Other, Including Plant Growth Regulators
Net Sales:
Total crop									$ 30,220us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember	$ 31,849us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember	$ 45,581us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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