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Stock Based Compensation Expense - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended | 3 Months Ended | 9 Months Ended |  | 9 Months Ended
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Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Sep. 30, 2013 Stock Options | Sep. 30, 2012 Stock Options | Sep. 30, 2013 Stock Options | Sep. 30, 2012 Stock Options | Sep. 30, 2013 Restricted Stock | Sep. 30, 2012 Restricted Stock | Sep. 30, 2013 Restricted Stock | Sep. 30, 2012 Restricted Stock | Sep. 30, 2013 Restricted Stock Vested immediately | Sep. 30, 2012 Restricted Stock Vested immediately | Sep. 30, 2013 Restricted Stock Cliff Vest Four Hundred Fifty Days | Sep. 30, 2013 Restricted Stock Cliff Vest After Three Years | Sep. 30, 2012 Restricted Stock Cliff Vest After Three Years | Sep. 30, 2012 Restricted Stock Cliff Vest Ninety Days | Sep. 30, 2013 Performance Shares | Jun. 30, 2013 Performance Shares | Sep. 30, 2013 Performance Shares | Sep. 30, 2013 Performance Shares Maximum | Sep. 30, 2013 Performance Shares Performance based shares based upon net income and net sales for the period commencing April 1, 2013 and ending December 31, 2015 | Sep. 30, 2013 Performance Shares Performance based shares based upon AVD stock price appreciation over the course of the period commencing June 6, 2013 and ending on December 31, 2015 | Sep. 30, 2013 Performance Shares Cliff Vest After Three Years
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation expense |  |  |  | $ 201 | $ 236 | $ 624 | $ 668 | $ 856 | $ 589 | $ 2,153 | $ 1,188 |  |  |  |  |  |  | $ 92 |  | $ 118 |  |  |  |
Nonvested unamortized stock-based compensation expense, value |  |  |  | 186 |  | 186 |  | 6,370 |  | 6,370 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Nonvested unamortized stock-based compensation expense, contractual term |  |  |  |  |  | 3 months 18 days |  |  |  | 2 years 1 month 6 days |  |  |  |  |  |  |  |  |  | 2 years 8 months 12 days |  |  |  |
Number of Shares, Granted | 4,500 | 8,230 | 145,884 |  |  |  |  |  |  | 158,614 | 247,536 |  |  |  |  |  |  |  | 24,637 |  |  |  |  | 24,637
Number of shares vested | 5,000 | 8,230 |  |  |  |  |  |  |  | 13,230 | 99,992 | 8,230 | 13,352 |  |  |  |  |  |  |  |  |  |  |
Number of shares expected to vest |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,500 | 148,884 | 227,184 | 7,000 |  |  |  |  |  |  |
Expenses recognized period |  |  |  |  |  |  |  |  |  |  |  |  |  | 450 days | 3 years | 3 years | 90 days |  |  |  |  |  |  | 3 years
Weighted Average Grant-Date Fair Value, Granted | $ 24.27 | $ 30.19 | $ 31.27 |  |  |  |  |  |  | $ 31.06 | $ 21.24 |  |  |  |  |  |  |  | $ 30.13 |  |  | $ 30.13 | $ 15.31 |
Weighted Average Grant-Date Fair Value, Vested | $ 8.32 | $ 30.37 |  |  |  |  |  |  |  | $ 22.04 | $ 14.13 |  |  |  |  |  |  |  |  |  |  |  |  |
Average vest date value Restricted share |  |  |  |  |  |  |  |  |  | $ 24.01 | $ 19.29 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of Shares, Forfeited |  |  | 8,000 |  |  |  |  |  |  | 8,000 | 1,367 |  |  |  |  |  |  |  |  |  |  |  |  |
Weighted Average Grant-Date Fair Value, Forfeited |  |  | $ 22.17 |  |  |  |  |  |  | $ 22.17 | $ 20.47 |  |  |  |  |  |  |  |  |  |  |  |  |
Percentage of shares vesting based on Performance |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 80.00% | 20.00% |
Targeted performance percentage |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 200.00% |  |  |
Unamortized stock-based compensation expense |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 623 |  | $ 623 |  |  |  |

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- Definition Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 14.F) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 -Section F + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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