2.2.0.25truefalse0100007 - Document - Risk Return Summary - Artio US Midcap Fund {Unlabeled}falsefalsetrue1falsefalsetruefalse{dei_DocumentInformationDocumentAxis} : Artio U.S. Midcap Fund 3/2/2010 - 3/1/2011 TwelveMonthsEnded_01Mar2011_S000012857_Memberhttp://www.sec.gov/CIK0000887210duration2010-03-02T00:00:002011-03-01T00:00:00falsefalseagif887210_S000012857Memberdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_S000012857Memberdei_DocumentInformationDocumentAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli03false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Artio US Midcap FundfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 falsefalseRisk/Return [Heading]4false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Investment ObjectivefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalseObjective [Heading]5false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The investment objective of the Artio US Midcap Fund is the long term growth of capital.falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a falsefalseObjective, Primary [Text Block]6false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Fees and Expenses of the FundfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph d -Subsection instructions falsefalseExpense [Heading]7false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00This table describes the fees and expenses that you may pay if you buy and hold shares of Fund.falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph b -Subsection instructions falsefalseExpense Narrative [Text Block]8false0rr_OperatingExpensesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 7 -Subsection table falsefalseOperating Expenses Caption [Text]9false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div> &lt;div style="display:none;" &gt;~ http://artioglobal.com/role/AnnualFundOperatingExpensesArtioUSMidcapFund column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row rr_DocumentInformationDocumentAxis compact agif887210 _S000012857_Member * ~&lt;/div&gt; </div></div>falsefalse<div><div> &lt;div style="display:none;" &gt;~ http://artioglobal.com/role/AnnualFundOperatingExpensesArtioUSMidcapFund column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row rr_DocumentInformationDocumentAxis compact agif887210 _S000012857_Member * ~&lt;/div&gt; </div></div>falsehttp://artioglobal.com/role/AnnualFundOperatingExpensesArtioUSMidcapFundfalsefalse0200207 - Schedule - Annual Fund Operating Expenses - Artio US Midcap Fundtruefalsefalse1falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-03-02T00:00:002011-03-01T00:00:00falsefalseArtio U.S. Midcap Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_S000012857Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, Artio US Midcap Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_C000034770Memberrr_ProspectusShareClassAxisexplicitMemberArtio U.S. Midcap FundClass A, Artio US Midcap FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-03-02T00:00:002011-03-01T00:00:00falsefalseArtio U.S. Midcap Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_S000012857Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass I, Artio US Midcap Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_C000034771Memberrr_ProspectusShareClassAxisexplicitMemberArtio U.S. Midcap FundClass I, Artio US Midcap FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*4false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.00800.0080falsefalsefalsetruefalse2truetruetrue0.00800.0080falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph a -Subsection instructions falsefalseManagement Fees0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00800.0080falsefalsefalsetruefalse2truetruetrue0.00800.0080falsefalsefalsetruefalseOthernanafalsefalseManagement Fees2falseRowprimaryElement*5false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 9 -Subsection table falsefalseDistribution and/or Service (12b-1) Fees0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalseDistribution and/or Service (12b-1) Fees3falseRowprimaryElement*6false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.01980.0198falsefalsefalsetruefalse2truetruetrue0.01790.0179falsefalsefalsetruefalseOtherrr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph c -Clause i -Subsection instructions falsefalseOther Expenses0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01980.0198falsefalsefalsetruefalse2truetruetrue0.01790.0179falsefalsefalsetruefalseOthernanafalsefalseOther Expenses4falseRowprimaryElement*7false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.03030.0303[2]falsefalsefalsetruefalse2truetruetrue0.02590.0259[2]falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subparagraph d -Subsection instructions falsefalseTotal Annual Fund Operating Expenses0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue0.03030.0303falsefalsefalsetruefalse2truetruetrue0.02590.0259falsefalsefalsetruefalseOthernanafalsefalseTotal Annual Fund Operating Expenses5falseRowprimaryElement*8false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue-0.0168-0.0168falsefalsefalsetruefalse2truetruetrue-0.0154-0.0154falsefalsefalsetruefalseOtherrr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalseFee Waiver/Expense Reimbursement0rr_FeeWaiverOrReimbursementOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0168-0.0168falsefalsefalsetruefalse2truetruetrue-0.0154-0.0154falsefalsefalsetruefalseOthernanafalsefalseFee Waiver/Expense Reimbursement6falseRowprimaryElement*9false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.01350.0135[1]falsefalsefalsetruefalse2truetruetrue0.01050.0105[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 11 -Subsection table falsefalseTotal Annual Fund Operating Expenses After Fee Waiver/Expense Reimbursement0rr_NetExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[2]1truetruetrue0.01350.0135falsefalsefalsetruefalse2truetruetrue0.01050.0105falsefalsefalsetruefalseOthernanafalsefalseTotal Annual Fund Operating Expenses After Fee Waiver/Expense Reimbursement1Total Annual Fund Operating Expenses shown in the table above may not correspond to the ratio of net expenses to the average net assets in the "Financial Highlights" section of this Prospectus to the extent that Acquired Fund Fees and Expenses are included in the table above.2The Adviser has contractually agreed to reimburse certain expenses of the Fund through February 29, 2012 (the "Expense Limitation"). Net operating expenses of the Fund, based on the average daily net assets are limited to 1.35% for Class A shares and 1.05% for Class I shares. Acquired Fund Fees and Expenses are excluded from this calculation. This arrangement does not cover interest, taxes, brokerage commissions, and extraordinary expenses. The Fund has agreed to repay the Adviser for expenses reimbursed to the Fund provided that repayment does not cause the Fund's annual operating expenses to exceed the Expense Limitation. Any such repayment must be made within three years after the year in which the Adviser incurred the expense.26Annual Fund Operating Expenses - Artio US Midcap Fund Artio U.S. Midcap FundUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalseAnnual Fund Operating Expenses [Table]10false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Expense ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalseExpense Example [Heading]11false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods. While your return may vary, the example also assumes that your investment has a 5% return each year, all dividends and capital gains distributions are reinvested and the Fund’s operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection example falsefalseExpense Example Narrative [Text Block]12false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div> &lt;div style="display:none;"&gt;~ http://artioglobal.com/role/ExpenseExampleArtioUSMidcapFund column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact agif887210 _S000012857_Member * ~&lt;/div&gt; </div></div>falsefalse<div><div> &lt;div style="display:none;"&gt;~ http://artioglobal.com/role/ExpenseExampleArtioUSMidcapFund column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_DocumentInformationDocumentAxis compact agif887210 _S000012857_Member * ~&lt;/div&gt; </div></div>truehttp://artioglobal.com/role/ExpenseExampleArtioUSMidcapFundfalsefalse0200307 - Schedule - Expense Example - Artio US Midcap Fund {Transposed}truefalsefalse1falseColumnprimaryElement*4false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue137137falsefalsefalsetruefalse2truefalsetrue107107falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalse1 YearfalseUSDfalsefalse$2falseColumnprimaryElement*5false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue778778falsefalsefalsetruefalse2truefalsetrue659659falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse3 YearsfalseUSDfalsefalse$3falseColumnprimaryElement*6false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue14441444falsefalsefalsetruefalse2truefalsetrue12371237falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse5 YearsfalseUSDfalsefalse$4falseColumnprimaryElement*7false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue32273227falsefalsefalsetruefalse2truefalsetrue28102810falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 2 -Subsection example falsefalse10 YearsfalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-03-02T00:00:002011-03-01T00:00:00falsefalseArtio U.S. Midcap Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_S000012857Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, Artio US Midcap Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_C000034770Memberrr_ProspectusShareClassAxisexplicitMemberArtio U.S. Midcap FundClass A, Artio US Midcap FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue137137falsefalsefalsetruefalse2truefalsetrue778778falsefalsefalsetruefalse3truefalsetrue14441444falsefalsefalsetruefalse4truefalsetrue32273227falsefalsefalsetruefalseOthernanafalsefalseClass A, Artio US Midcap Fund2falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-03-02T00:00:002011-03-01T00:00:00falsefalseArtio U.S. Midcap Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_S000012857Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass I, Artio US Midcap Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_C000034771Memberrr_ProspectusShareClassAxisexplicitMemberArtio U.S. Midcap FundClass I, Artio US Midcap FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue107107falsefalsefalsetruefalse2truefalsetrue659659falsefalsefalsetruefalse3truefalsetrue12371237falsefalsefalsetruefalse4truefalsetrue28102810falsefalsefalsetruefalseOthernanafalsefalseClass I, Artio US Midcap Fund42Expense Example - Artio US Midcap Fund Artio U.S. Midcap Fund (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalseExpense Example, With Redemption [Table]13false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Portfolio TurnoverfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 5 -Subsection instructions falsefalsePortfolio Turnover [Heading]14false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The Fund pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund’s performance. During the most recent fiscal year, the Fund’s portfolio turnover rate was 141% of the average value of its portfolio.falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 3 -Subsection example falsefalsePortfolio Turnover [Text Block]15false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Principal Investment StrategiesfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalseStrategy [Heading]16false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>The Fund normally invests in equity securities of U.S. companies which are between small and large size. The Fund generally invests in forty to seventy companies. The Adviser generally selects securities using a “bottom-up” approach that focuses on company-specific factors.</p><p>• Under normal circumstances, the Fund will invest at least 80% of its net assets (including equity related futures, options, swaps and other instruments as well as borrowings for investment purposes) in equity securities of U.S. mid-capitalization or “midcap” companies, as determined at the time of purchase. The Fund will provide shareholders with at least 60 days notice prior to any changes in this policy.</p><p>• Generally, the Adviser will select securities of companies whose market capitalization at the time of purchase falls (i) within the market capitalization range of companies within the Russell Midcap Index or (ii) within the range of the three year average minimum and maximum market capitalizations of companies in the Russell Midcap Index as of December 31 of the three preceding years. As of December 31, 2010, the capitalization range of the Russell Midcap Index was $231.81 million to $22.07 billion and the three year average market capitalization range of the Russell Midcap Index was $107.45 million to $17.48 billion.</p><p>• Invests in “growth” and “value” securities. Growth securities are those whose earnings are expected to grow at an above average rate relative to the market. Value securities appear undervalued and thus trade at a lower price relative to their fundamentals.</p><p>• The Fund may engage in active and frequent trading of portfolio securities to achieve its investment objective.</p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a falsefalseStrategy Narrative [Text Block]17false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Principal Investment RisksfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalseRisk [Heading]18false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>Recent events witnessed within markets and economies worldwide have led to significant volatility within the U.S. securities markets, increasing the risks associated with an investment in the Fund. Investments in the Fund carry a certain amount of risk and the Fund cannot guarantee that it will achieve its investment objective. You may lose money by investing in the Fund. Below are the principal risks of investing in the Fund:</p><p><b>• Stock Market Risk:</b> The Fund will invest in equity securities that may lose value because of declines in the stock market and may be adversely affected by market conditions and factors related to a particular company or industry. Companies in developing industries tend to be more vulnerable to adverse developments.</p><p><b>• Medium-Sized Companies Risk:</b> Stocks of medium-sized companies or midcap companies tend to be more volatile and less liquid than stocks of larger companies. Compared to larger companies, medium-sized companies typically have analyst coverage by fewer Wall Street firms and may trade less frequently and be more susceptible to fluctuations in both stock price and company performance than larger companies as they may trade at prices that reflect incomplete or inaccurate information.</p><p><b>• Liquidity Risk:</b> Particular investments may be difficult to purchase or sell. The Fund may make investments that may become less liquid in response to market developments or adverse investor perceptions, which may reduce the returns of the Fund because it may be unable to sell the illiquid securities at an advantageous time or price.</p><p><b>• Active Trading Risk:</b> The Fund may engage in active and frequent trading of portfolio securities to achieve its investment objective. If a Fund does trade this way, it may incur increased costs, which can lower the actual return of the Fund. Active trading may also increase short term gains and losses, which may affect taxes that must be paid.</p><p><b>• Redemption Risk:</b> The Fund may need to sell its portfolio holdings in order to meet shareholder redemption requests. In selling its holdings to meet redemption requests, the Fund could experience a loss if the redemption requests are unusually large or frequent, occur in times of overall market turmoil, or declining prices for the securities sold, or when the securities the Fund wishes to or is required to sell are illiquid.</p><p>Further information about the Fund’s strategies and risks is provided in the section, <i>Fund Strategies and Risks.</i></p><p>An investment in the Fund is not a bank deposit or obligation of any bank and is not endorsed or guaranteed by any bank and is not insured or guaranteed by the U.S. government, the Federal Deposit Insurance Corporation, the Federal Reserve Board or any other governmental agency.</p><p>You could lose money investing in the Fund.</p><p>Further information about the Fund’s strategies and risks is provided in the section, <i>Fund Strategies and Risks.</i></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subparagraph i -Clause instruction -Subsection b falsefalseRisk Narrative [Text Block]19false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PerformancefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalseBar Chart and Performance Table [Heading]20false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The Calendar Year Total Returns Chart below demonstrates the risks of investing in the Fund by showing how Fund’s performance has varied from year to year. The table demonstrates these risks by showing how the Fund’s annual returns of Class A shares compare to the performance of a broad-based market index over various periods of time. The Fund’s average annual return figures for the one-year, five-year and ten-year/since inception periods are net of applicable fee waivers and/or certain expense offset arrangements. The Fund’s average annual return figures without fee waivers and expense offset arrangements would have been lower. You cannot invest directly in an index. Unlike a mutual fund, an index does not incur expenses. If expenses were deducted, actual returns of the index would be lower. Returns (before and after taxes) are based on past results and are not an indication of future performance. Returns for Class I shares will differ to the extent that Class I has lower expenses. Updated performance information is available at the Fund’s website: www.artiofunds.com.falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalsePerformance Narrative [Text Block]21false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Calendar Year Total Returns for Class A SharesfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subsection b falsefalseBar Chart [Heading]22false0rr_BarChartTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div style="display:none">~ http://artioglobal.com/role/AnnualTotalReturnsBarChartArtioUSMidcapFund column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact agif887210 _S000012857_Member * ~</div></div>falsefalseBarChart7.jpg<div><div style="display:none">~ http://artioglobal.com/role/AnnualTotalReturnsBarChartArtioUSMidcapFund column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact agif887210 _S000012857_Member * ~</div></div>falsehttp://artioglobal.com/role/AnnualTotalReturnsBarChartArtioUSMidcapFundfalsefalse0200507 - Schedule - Annual Total Returns (Bar Chart) - Artio US Midcap Fundtruefalsefalse1falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-03-02T00:00:002011-03-01T00:00:00falsefalseArtio U.S. Midcap Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_S000012857Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseClass A, Artio US Midcap Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_C000034770Memberrr_ProspectusShareClassAxisexplicitMemberArtio U.S. Midcap FundClass A, Artio US Midcap FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*4false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.02870.0287falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse20070rr_AnnualReturn2007truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.02870.0287falsefalsefalsetruefalseOthernanafalsefalse20072falseRowprimaryElement*5false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse-0.4583-0.4583falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse20080rr_AnnualReturn2008truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.4583-0.4583falsefalsefalsetruefalseOthernanafalsefalse20083falseRowprimaryElement*6false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.49290.4929falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a -Subsection b falsefalse20090rr_AnnualReturn2009truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.49290.4929falsefalsefalsetruefalseOthernanafalsefalse20094falseRowprimaryElement*7false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.25340.2534falsefalsefalsetruefalseOtherxbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalse20100rr_AnnualReturn2010truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.25340.2534falsefalsefalsetruefalseOthernanafalsefalse201014Annual Total Returns (Bar Chart) - Artio US Midcap Fund UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to BarChartData.No authoritative reference available.falsefalseBar Chart [Table]23false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p><i>Highest quarterly return: 21.76% (for the quarter ended June 30, 2009)</i></p><p><i>Lowest quarterly return: -32.05% (for the quarter ended December 31, 2008)</i></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph ii -Subsection b falsefalseBar Chart Closing [Text Block]24false0rr_PerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Average Annual Total Returns (for the periods ended December 31, 2010)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit c -Subsection b falsefalsePerformance Table Heading25false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div><div style="display: none">~ http://artioglobal.com/role/AverageAnnualTotalReturnsArtioUSMidcapFund row period compact * row primary compact * column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row dei_DocumentInformationDocumentAxis compact agif887210 _S000012857_Member * ~ Rows and columns are reversed here due to transposition</div></div>falsefalse<div><div style="display: none">~ http://artioglobal.com/role/AverageAnnualTotalReturnsArtioUSMidcapFund row period compact * row primary compact * column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row dei_DocumentInformationDocumentAxis compact agif887210 _S000012857_Member * ~ Rows and columns are reversed here due to transposition</div></div>truehttp://artioglobal.com/role/AverageAnnualTotalReturnsArtioUSMidcapFundfalsefalse0200607 - Schedule - Average Annual Total Returns - Artio US Midcap Fund {Transposed}truefalsefalse1falseColumnprimaryElement*4false0rr_AverageAnnualReturnLabelrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Class A –Return Before Taxesfalsefalsefalsetruefalse2falsetruefalse00Class I–Return Before Taxesfalsefalsefalsetruefalse3falsetruefalse00Class A–Return After Taxes on Distributionsfalsefalsefalsetruefalse4falsetruefalse00Class A–Return After Taxes on Distributions and Sale of Fund Sharesfalsefalsefalsetruefalse5falsetruefalse00Russell Midcap IndexfalsefalsefalsetruefalseOtherxbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalseLabelfalseUSDfalsefalse$2falseColumnprimaryElement*5false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002006-07-24falsefalsetruetruefalse2falsetruefalse002006-07-24falsefalsetruetruefalse3falsetruefalse002006-07-24falsefalsetruetruefalse4falsetruefalse002006-07-24falsefalsetruetruefalse5falsetruefalse00falsefalsetruetruefalseOtherxbrli:dateItemTypedateReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph instructions -Clause 4 -Subsection b falsefalseInception DatefalseUSDfalsefalse$3falseColumnprimaryElement*6false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.25340.2534falsefalsefalsetruefalse2truetruetrue0.2570.257falsefalsefalsetruefalse3truetruetrue0.25340.2534falsefalsefalsetruefalse4truetruetrue0.16470.1647falsefalsefalsetruefalse5truetruetrue0.25470.2547falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsePast 1 YearfalseUSDfalsefalse$4falseColumnprimaryElement*7false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.04880.0488falsefalsefalsetruefalse2truetruetrue0.05210.0521falsefalsefalsetruefalse3truetruetrue0.0430.043falsefalsefalsetruefalse4truetruetrue0.03950.0395falsefalsefalsetruefalse5truetruetrue0.04950.0495falsefalsefalsetruefalseOtherxbrli:pureItemTypepureReturn Before Taxes.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 -Subsection b falsefalsePast 10 Years/Since InceptionfalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-03-02T00:00:002011-03-01T00:00:00falsefalseArtio U.S. Midcap Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_S000012857Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseReturn Before Taxesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_ReturnBeforeTaxesMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, Artio US Midcap Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_C000034770Memberrr_ProspectusShareClassAxisexplicitMemberArtio U.S. Midcap FundReturn Before TaxesClass A, Artio US Midcap FundStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Class A –Return Before TaxesClass A –Return Before Taxesfalsefalsefalsetruefalse2falsetruefalse002006-07-242006-07-24falsefalsetruetruefalse3truetruetrue0.25340.2534falsefalsefalsetruefalse4truetruetrue0.04880.0488falsefalsefalsetruefalseOthernanafalsefalseArtio U.S. Midcap Fund Return Before Taxes Class A, Artio US Midcap Fund2falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-03-02T00:00:002011-03-01T00:00:00falsefalseArtio U.S. Midcap Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_S000012857Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseReturn Before Taxesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_ReturnBeforeTaxesMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass I, Artio US Midcap Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_C000034771Memberrr_ProspectusShareClassAxisexplicitMemberArtio U.S. Midcap FundReturn Before TaxesClass I, Artio US Midcap FundStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Class I–Return Before TaxesClass I–Return Before Taxesfalsefalsefalsetruefalse2falsetruefalse002006-07-242006-07-24falsefalsetruetruefalse3truetruetrue0.2570.257falsefalsefalsetruefalse4truetruetrue0.05210.0521falsefalsefalsetruefalseOthernanafalsefalseArtio U.S. Midcap Fund Return Before Taxes Class I, Artio US Midcap Fund3falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-03-02T00:00:002011-03-01T00:00:00falsefalseArtio U.S. Midcap Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_S000012857Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseReturn After Taxes on Distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, Artio US Midcap Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_C000034770Memberrr_ProspectusShareClassAxisexplicitMemberArtio U.S. Midcap FundReturn After Taxes on DistributionsClass A, Artio US Midcap FundStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Class A–Return After Taxes on DistributionsClass A–Return After Taxes on Distributionsfalsefalsefalsetruefalse2falsetruefalse002006-07-242006-07-24falsefalsetruetruefalse3truetruetrue0.25340.2534falsefalsefalsetruefalse4truetruetrue0.0430.043falsefalsefalsetruefalseOthernanafalsefalseArtio U.S. Midcap Fund Return After Taxes on Distributions Class A, Artio US Midcap Fund4falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-03-02T00:00:002011-03-01T00:00:00falsefalseArtio U.S. Midcap Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_S000012857Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseReturn After Taxes on Distributions and Sale of Fund Sharesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberfalsefalseClass A, Artio US Midcap Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_C000034770Memberrr_ProspectusShareClassAxisexplicitMemberArtio U.S. Midcap FundReturn After Taxes on Distributions and Sale of Fund SharesClass A, Artio US Midcap FundStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Class A–Return After Taxes on Distributions and Sale of Fund SharesClass A–Return After Taxes on Distributions and Sale of Fund Sharesfalsefalsefalsetruefalse2falsetruefalse002006-07-242006-07-24falsefalsetruetruefalse3truetruetrue0.16470.1647falsefalsefalsetruefalse4truetruetrue0.03950.0395falsefalsefalsetruefalseOthernanafalsefalseArtio U.S. Midcap Fund Return After Taxes on Distributions and Sale of Fund Shares Class A, Artio US Midcap Fund5falseRowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-03-02T00:00:002011-03-01T00:00:00falsefalseRussell Midcap Indexdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldiagif887210_RussellMidcapIndexMemberdei_DocumentInformationDocumentAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberRussell Midcap IndexBefore TaxesShare ClassesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Russell Midcap IndexRussell Midcap Indexfalsefalsefalsetruefalse2falsefalsefalse00falsefalsefalsefalsefalse3truetruetrue0.25470.2547falsefalsefalsetruefalse4truetruetrue0.04950.0495falsefalsefalsetruefalseOthernanafalsefalseRussell Midcap Index45Average Annual Total Returns - Artio US Midcap Fund UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalsePerformance [Table]26false0rr_PerformanceTableNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00After-tax returns are calculated using the historical highest individual federal marginal income tax rates during the respective periods, and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown, and the after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts. After-tax returns are shown only for Class A shares, and after-tax returns for Class I shares will differ. Past performance, before and after taxes, is not necessarily an indication of how the Fund will perform in the future.falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a table showing the Fund's (A) average annual total return; (B) average annual total return (after taxes on distributions); and (C) average annual total return (after taxes on distributions and redemption). A Money Market Fund should show only the returns described in clause (A) of the preceding sentence. All returns should be shown for 1-, 5-, and 10- calendar year periods ending on the date of the most recently completed calendar year (or for the life of the Fund, if shorter), but only for periods subsequent to the effective date of the Fund's registration statement. The table also shouldshow the returns of an appropriate broadbased securities market index as defined in Instruction 5 to Item 22(b)(7) for the same periods. A Fund that has been in existence for more than 10 years also may include returns for the life of the Fund. A Money Market Fund may provide the Fund's 7-day yield ending on the date of the most recent calendar year or disclose a toll-free (or collect) telephone number that investors can use to obtain the Fund's current 7-day yield. For a Fund (other than a Money Market Fund or a Fund described in General Instruction C.3.(d)(iii)), provide the information in the following table with the specified captions AVERAGE ANNUAL TOTAL RETURNS (For the periods ended December 31, _____). For a Fund that provides annual total returns for only one calendar year or for a Fund that does not include the bar chart because it does not have annual returns for a full calendar year, modify, as appropriate, the narrative explanation required by paragraph (c)(2)(i) (e.g., by stating that the information gives some indication of the risks of an investment in the Fund by comparing the Fund's performance with a broad measure of market performance).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 2 -Subparagraph iv -Subsection b falsefalsePerformance Table Narrative124Risk Return Summary - Artio US Midcap Fund (Artio U.S. Midcap Fund)UnKnownUnKnownUnKnownUnKnownfalsetrue