2.2.0.25truefalse01102 - Document - Risk/Return Summary {Unlabeled} (TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND)falsefalsetrue1falsefalseUSDtruefalse{dei_DocumentInformationDocumentAxis} : SummaryS000006455 Member {dei_LegalEntityAxis} : S000006455 Member 4/19/2011 - 4/19/2011 USD ($) $eol_0001144204-11-004672_STD_1_20110419_0_396770x-9995483_396840x-9992399http://www.sec.gov/CIK0000914243duration2011-04-19T00:00:002011-04-19T00:00:00falsefalseck0000914243_SummaryS000006455Memberdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_SummaryS000006455Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseck0000914243_S000006455Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberpureStandardhttp://www.xbrl.org/2003/instancepure0iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://www.touchstoneinvestments.com/role/riskreturn_s000006455member1falsefalsefalse00TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND (Prospectus Summary) | TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND (Prospectus Summary) | TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDfalsefalsefalsefalsefalse1falsefalseUSDtruefalse{dei_DocumentInformationDocumentAxis} : SummaryS000006455 Member {dei_LegalEntityAxis} : S000006455 Member 4/19/2011 - 4/19/2011 USD ($) $eol_0001144204-11-004672_STD_1_20110419_0_396770x-9995483_396840x-9992399http://www.sec.gov/CIK0000914243duration2011-04-19T00:00:002011-04-19T00:00:00falsefalseck0000914243_SummaryS000006455Memberdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_SummaryS000006455Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseck0000914243_S000006455Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberpureStandardhttp://www.xbrl.org/2003/instancepure0iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$OthernaNo definition available.No authoritative reference available.falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND (Prospectus Summary) | TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND3false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND SUMMARYfalsefalsefalsefalsefalseOtherxbrli: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, Heading4false0rr_ObjectiveHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00THE FUND'S INVESTMENT GOALfalsefalsefalsefalsefalseOtherxbrli: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 falsefalseInvestment Objective, Heading5false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<pre>The Touchstone Healthcare and Biotechnology Fund seeks long-term capital appreciation.</pre>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 falsefalseinvestment Objective, Primary6false0rr_ExpenseHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00THE FUND'S FEES AND EXPENSESfalsefalsefalsefalsefalseOtherxbrli: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, Heading7false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<pre>This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts for Class A shares if you and your family invest, or agree to invest in the future, at least $50,000 or more in the Touchstone Funds. More information about these and other discounts is available from your financial professional and in the section entitled "Choosing a Class of Shares" in the Fund's prospectus and in the section entitled "Purchase and Redemption of Shares" in the Fund's Statement of Additional Information.</pre>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, Narrative8false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00SHAREHOLDER FEES (FEES PAID DIRECTLY FROM YOUR INVESTMENT)falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subsection table falsefalseShareholder Fees, Caption9false0rr_ShareholderFeesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://www.TouchstoneInvestments.com/role/ShareholderFeesData_S000006455Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div>falsefalse<div style="display:none">~ http://www.TouchstoneInvestments.com/role/ShareholderFeesData_S000006455Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div>falsehttp://www.TouchstoneInvestments.com/role/ShareholderFeesData_S000006455Memberfalsefalse01103 - Schedule - Shareholder Feestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-19T00:00:002011-04-19T00:00:00falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberfalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_C000017653Memberrr_ProspectusShareClassAxisexplicitMemberTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS Aiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-19T00:00:002011-04-19T00:00:00falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberfalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_C000039640Memberrr_ProspectusShareClassAxisexplicitMemberTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - Class Ciso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 1 -Subsection table falsefalseMaximum Sales Charge Imposed on Purchases (as a percentage of offering price)0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05750.0575falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalseMaximum Sales Charge Imposed on Purchases (as a percentage of offering price)2falseRowprimaryElement*4false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph a -Clause i -Subsection instructions falsefalseMaximum Deferred Sales Charge (as a percentage of original purchase price or the amount redeemed, whichever is less)0rr_MaximumDeferredSalesChargeOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalseOthernanafalsefalseMaximum Deferred Sales Charge (as a percentage of original purchase price or the amount redeemed, whichever is less)3falseRowprimaryElement*5false0rr_RedemptionFeerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truefalsetrue1515falsefalsefalsetruefalse2truefalsetrue1515falsefalsefalsetruefalseMonetaryrr:NonPositiveMonetaryTypemonetary"Redemption Fee" (as a percentage of amount redeemed, if applicable) If the Fund is an Exchange-Traded Fund and issues or redeems shares in creation units of not less than 25,000 shares each, exclude any fees charged for the purchase and redemption of the Fund's creation units. "Redemption Fee" includes a fee charged for any redemption of the Fund's shares, but does not include a deferred sales charge (load) imposed upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 1 -Subparagraph 4 -Subsection table falsefalseWire Redemption Fee0rr_RedemptionFeetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue1515falsefalsefalsetruefalse2truefalsetrue1515falsefalsefalsetruefalseOthernanafalsefalseWire Redemption Fee23Shareholder Fees TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No authoritative reference available.falsefalseShareholder Fees [Table]10false0rr_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, Caption11false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://www.TouchstoneInvestments.com/role/OperatingExpensesData_S000006455Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div>falsefalse<div style="display:none">~ http://www.TouchstoneInvestments.com/role/OperatingExpensesData_S000006455Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * row primary compact * ~</div>falsehttp://www.TouchstoneInvestments.com/role/OperatingExpensesData_S000006455Memberfalsefalse01104 - Schedule - Annual Fund Operating Expensestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-19T00:00:002011-04-19T00:00:00falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberfalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_C000017653Memberrr_ProspectusShareClassAxisexplicitMemberTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS Aiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-19T00:00:002011-04-19T00:00:00falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberfalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_C000039640Memberrr_ProspectusShareClassAxisexplicitMemberTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - Class Ciso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01000.0100falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalseOtherrr: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_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01000.0100falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalseOthernanafalsefalseManagement Fees2falseRowprimaryElement*4false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalseOtherrr: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_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalseOthernanafalsefalseDistribution and/or Service (12b-1) Fees3falseRowprimaryElement*6false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00880.0088falsefalsefalsetruefalse2truetruetrue0.01220.0122falsefalsefalsetruefalseOtherrr: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_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00880.0088falsefalsefalsetruefalse2truetruetrue0.01220.0122falsefalsefalsetruefalseOthernanafalsefalseOther Expenses4falseRowprimaryElement*9false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.02130.0213falsefalsefalsetruefalse2truetruetrue0.03220.0322falsefalsefalsetruefalseOtherrr: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_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.02130.0213falsefalsefalsetruefalse2truetruetrue0.03220.0322falsefalsefalsetruefalseOthernanafalsefalseTotal Annual Fund Operating Expenses5falseRowprimaryElement*10false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truetruetrue0.00580.0058[1]falsefalsefalsetruefalse2truetruetrue0.00920.0092[1]falsefalsefalsetruefalseOtherrr: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 and/or Expense Reimbursement0rr_FeeWaiverOrReimbursementOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue0.00580.0058falsefalsefalsetruefalse2truetruetrue0.00920.0092falsefalsefalsetruefalseOthernanafalsefalseFee Waiver and/or Expense Reimbursement6falseRowprimaryElement*11false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.01550.0155falsefalsefalsetruefalse2truetruetrue0.02300.0230falsefalsefalsetruefalseOtherrr: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 and/or Expense Reimbursement0rr_NetExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01550.0155falsefalsefalsetruefalse2truetruetrue0.02300.0230falsefalsefalsetruefalseOthernanafalsefalseTotal Annual Fund Operating Expenses After Fee Waiver and/or Expense Reimbursement1Touchstone Advisors and the Trust have entered into an expense limitation agreement whereby Touchstone Advisors has contractually agreed to waive a portion of its fees and/or reimburse certain Fund expenses in order to limit annual fund operating expenses to 1.55% and 2.30% for Class A shares and Class C shares, respectively. This expense limitation will remain in effect until at least January 27, 2012 but can be terminated by a vote of the Board of Trustees of the Fund if they deem the termination to be beneficial to the Fund shareholders. See the discussion entitled "Contractual Fee Waiver Agreement" under the section entitled "The Funds' Management" in the Fund's prospectus for more information.26Annual Fund Operating Expenses TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxis*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]12false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00EXAMPLE.falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subsection instructions falsefalseExpense Example, Heading13false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<pre>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, except as indicated, redeem all of your shares at the end of those periods. The example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same (reflecting the one year contractual fee waiver). Although your actual costs may be higher or lower, based on these assumptions your costs would be:</pre>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, Narrative14false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://www.TouchstoneInvestments.com/role/ExpenseExample_S000006455Member column primary compact * row dei_LegalEntityAxis compact * row rr_ProspectusShareClassAxis compact * ~</div>falsefalse<div style="display:none">~ http://www.TouchstoneInvestments.com/role/ExpenseExample_S000006455Member column primary compact * row dei_LegalEntityAxis compact * row rr_ProspectusShareClassAxis compact * ~</div>truehttp://www.TouchstoneInvestments.com/role/ExpenseExample_S000006455Memberfalsefalse01105 - Schedule - Expense Example {Transposed}truefalsefalse1falseColumndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberfalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_C000017653Memberrr_ProspectusShareClassAxisexplicitMemberTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS AfalseUSDfalsefalse$2falseColumndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberfalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_C000039640Memberrr_ProspectusShareClassAxisexplicitMemberTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - Class CfalseUSDfalsefalse$1falseRowperiodPeriod*RowprimaryElement*RowunitUnit*3false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue724724falsefalsefalsetruefalse2truefalsetrue336336falsefalsefalsetruefalseMonetaryrr: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 falsefalseExpense Example, With Redemption, 1 Yearduration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700rr_ExpenseExampleYear01truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue724724falsefalsefalsetruefalse2truefalsetrue336336falsefalsefalsetruefalseOthernanafalsefalseExpense Example, With Redemption, 1 Year2falseRowperiodPeriod*RowprimaryElement*RowunitUnit*4false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue11511151falsefalsefalsetruefalse2truefalsetrue906906falsefalsefalsetruefalseMonetaryrr: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 falsefalseExpense Example, With Redemption, 3 Yearsduration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700rr_ExpenseExampleYear03truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue11511151falsefalsefalsetruefalse2truefalsetrue906906falsefalsefalsetruefalseOthernanafalsefalseExpense Example, With Redemption, 3 Years3falseRowperiodPeriod*RowprimaryElement*RowunitUnit*5false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue16031603falsefalsefalsetruefalse2truefalsetrue16041604falsefalsefalsetruefalseMonetaryrr: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 falsefalseExpense Example, With Redemption, 5 Yearsduration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700rr_ExpenseExampleYear05truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue16031603falsefalsefalsetruefalse2truefalsetrue16041604falsefalsefalsetruefalseOthernanafalsefalseExpense Example, With Redemption, 5 Years4falseRowperiodPeriod*RowprimaryElement*RowunitUnit*6false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue28522852falsefalsefalsetruefalse2truefalsetrue34593459falsefalsefalsetruefalseMonetaryrr: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 falsefalseExpense Example, With Redemption, 10 Yearsduration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700rr_ExpenseExampleYear10truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue28522852falsefalsefalsetruefalse2truefalsetrue34593459falsefalsefalsetruefalseOthernanafalsefalseExpense Example, With Redemption, 10 Years24Expense Example TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*RowperiodPeriod*RowprimaryElement*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]15false0rr_ExpenseExampleNoRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://www.TouchstoneInvestments.com/role/ExpenseExampleNoRedemption_S000006455Member column primary compact * row dei_LegalEntityAxis compact * row rr_ProspectusShareClassAxis compact * ~</div>falsefalse<div style="display:none">~ http://www.TouchstoneInvestments.com/role/ExpenseExampleNoRedemption_S000006455Member column primary compact * row dei_LegalEntityAxis compact * row rr_ProspectusShareClassAxis compact * ~</div>truehttp://www.TouchstoneInvestments.com/role/ExpenseExampleNoRedemption_S000006455Memberfalsefalse01106 - Schedule - Expense Example, No Redemption {Transposed}truefalsefalse1falseColumndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberfalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_C000039640Memberrr_ProspectusShareClassAxisexplicitMemberTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - Class CfalseUSDfalsefalse$1falseRowperiodPeriod*RowprimaryElement*RowunitUnit*3false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue233233falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalseExpense Example, No Redemption, 1 Yearduration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700rr_ExpenseExampleNoRedemptionYear01truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue233233falsefalsefalsetruefalseOthernanafalsefalseExpense Example, No Redemption, 1 Year2falseRowperiodPeriod*RowprimaryElement*RowunitUnit*4false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue906906falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 2 -Subparagraph 1 -Subsection example falsefalseExpense Example, No Redemption, 3 Yearsduration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700rr_ExpenseExampleNoRedemptionYear03truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue906906falsefalsefalsetruefalseOthernanafalsefalseExpense Example, No Redemption, 3 Years3falseRowperiodPeriod*RowprimaryElement*RowunitUnit*5false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue16041604falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalseExpense Example, No Redemption, 5 Yearsduration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700rr_ExpenseExampleNoRedemptionYear05truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue16041604falsefalsefalsetruefalseOthernanafalsefalseExpense Example, No Redemption, 5 Years4falseRowperiodPeriod*RowprimaryElement*RowunitUnit*6false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue34593459falsefalsefalsetruefalseMonetaryrr:NonNegativeMonetaryTypemonetaryYou would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Paragraph 4 -Subparagraph f -Subsection instructions falsefalseExpense Example, No Redemption, 10 Yearsduration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700rr_ExpenseExampleNoRedemptionYear10truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue34593459falsefalsefalsetruefalseOthernanafalsefalseExpense Example, No Redemption, 10 Years14Expense Example, No Redemption (USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*RowperiodPeriod*RowprimaryElement*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExampleNoRedemption.No authoritative reference available.falsefalseExpense Example, No Redemption [Table]16false0rr_PortfolioTurnoverHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PORTFOLIO TURNOVER. falsefalsefalsefalsefalseOtherxbrli: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, Heading17false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<pre>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 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 180% of the average value of its portfolio.</pre>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 Turnover18false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00THE FUND'S PRINCIPAL 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 falsefalseInvestment Strategy, Heading19false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<pre>The Touchstone Healthcare and Biotechnology Fund invests, under normal market conditions, at least 80% of its assets in common stocks of healthcare and biotechnology companies that are traded in the U.S. This is a non-fundamental investment policy that can be changed by the Fund upon 60 days' prior notice to shareholders. The Fund concentrates its investments in the healthcare and biotechnology industries. Healthcare companies include pharmaceutical companies, companies involved in research and development of pharmaceutical products and services, companies involved in the operation of healthcare facilities, and the companies that support the production, manufacturing, sale and/or distribution of medicines, medical supplies, medical services and other healthcare-related products and services. Biotechnology companies are those that engage in the research, development, and manufacture of various biotechnological products, services, and processes; manufacture and/or distribute biotechnological and biomedical products, including devices and instruments; provide or benefit significantly from scientific and technological advances in biotechnology; or provide processes or services instead of, or in addition to, products. To determine whether a potential investment is doing business in the healthcare or biotechnology sectors, the sub-advisor, Turner Investment Partners, Inc. ("TIP"), generally considers whether (i) the company earns at least 50% of its gross income from the healthcare or biotechnology sectors; (ii) at least 50% of its assets are devoted to producing revenues from the healthcare or biotechnology sectors; or (iii) the company is listed within the Healthcare Company sector universe maintained by Frank Russell &amp; Co. While the Fund typically invests in the common stocks of medium to large capitalization companies, it may invest in companies of any size in seeking to achieve its investment goal. These securities may be traded over the counter or listed on an exchange. It is not expected that the Fund will own a substantial amount of securities that pay dividends. TIP pursues a bottom-up approach that emphasizes fundamental research analysis to find growth companies that it believes have superior earnings prospects, reasonable valuations, and favorable trading-volume and price patterns. TIP generally considers selling a security when it detects a deterioration in the company's earnings potential or when other opportunities appear more attractive. The Fund is non-diversified and may invest a significant percentage of its assets in the securities of a single company. The Fund may engage in frequent and active trading of securities as part of its principal investment strategy.</pre>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 falsefalseInvestment Strategy, Narrative20false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00THE PRINCIPAL RISKSfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1 -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Paragraph 1 -Subsection b falsefalseRisk, Heading21false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<pre>The Fund's share price will fluctuate. You could lose money on your investment in the Fund and the Fund could also return less than other investments. Since it purchases common stocks, the Fund is subject to the risk that stock prices will fall over short or extended periods of time. The Fund's investment approach is intended to provide long-term capital appreciation, which carries with it the potential for price volatility associated with owning equity securities. Historically, the equity markets have moved in cycles. The value of the Fund's equity securities may fluctuate from day to day. Individual companies may report poor results or be negatively affected by industry and/or economic trends and developments. The prices of securities issued by these companies may suffer a decline in response to such developments which could result in a decline in the value of the Fund's shares. These factors contribute to price volatility, which is the principal risk of investing in the Fund. In addition, common stocks represent a share of ownership in a company, and rank after bonds and preferred stock in their claim on the company's assets in the event of liquidation. Since the Fund's investments are concentrated in the healthcare and biotechnology industries, they are subject to the risk that these industries will underperform the broader market, as well as the risk that issuers in these industries will be impacted by market conditions, legislative or regulatory changes, or competition. The competitive pressures of advancing technology and the number of companies and product offerings that continue to expand could cause healthcare and biotechnology companies to become increasingly sensitive to short product cycles and aggressive pricing. Furthermore, the types of products that are later alleged to be harmful or unsafe may be substantial, and may have a significant impact on a company's market value and/or share price. The smaller capitalization companies in which the Fund invests may be more vulnerable to adverse business or economic events than larger, more established companies. Many biotechnology companies are relatively small and have thinly traded equity securities, may not yet offer products or offer a simple product and may have persistent losses during a new product's transition from development to production or erratic revenue patterns. Furthermore, these small companies may have limited product lines, markets and financial resources, and may depend upon a relatively small management group. Therefore, small cap company stocks may be more volatile than stocks of larger companies. The Fund invests in companies that TIP believes have strong earnings growth potential. TIP's investment approach may be contrary to general investment opinion at times or otherwise fail to produce the desired results, causing the Fund to underperform funds that also seek capital appreciation but use different approaches to the security selection process. Frequent and active trading may result in greater expenses to the Fund, which may lower the Fund's performance and may generate more taxable short-term gains for shareholders. The Fund is non-diversified, which means that it may invest a greater percentage of its assets than other diversified mutual funds in the securities of a limited number of issuers. The use of a non-diversified investment strategy may increase the volatility of the Fund's investment performance, as the Fund may be more susceptible to risks associated with a single economic, political or regulatory event than a diversified fund. This Fund should only be purchased by investors seeking long-term capital appreciation who can withstand the share price volatility of focused equity investing, and who seek exposure to the healthcare and biotechnology industries. As with any mutual fund, there is no guarantee that the Fund will achieve its investment goal. You can find more information about the Fund's investments and risks under the "Investment Strategies and Risks" section of this Prospectus.</pre>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, Narrative22false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00THE FUND'S PERFORMANCEfalsefalsefalsefalsefalseOtherxbrli: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, Heading23false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<pre>The bar chart and performance table below illustrate some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual total returns for 1 year, 5 years, and since inception compare with the S&amp;P 500 Healthcare Index. The bar chart does not reflect any sales charges, which would reduce your return. The Fund's past performance (before and after taxes) does not necessarily indicate how the Fund will perform in the future. Updated performance is available at no cost by visiting www.TouchstoneInvestments.com or by calling 1.800.543.0407.</pre>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, Narrative24false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS A TOTAL RETURN AS OF DECEMBER 31falsefalsefalsefalsefalseOtherxbrli: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, Heading25false0rr_BarChartTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://www.TouchstoneInvestments.com/role/BarChartData_S000006455Member column primary compact * row dei_LegalEntityAxis compact * row rr_ProspectusShareClassAxis compact * ~</div>falsefalseBarChart1.jpg<div style="display:none">~ http://www.TouchstoneInvestments.com/role/BarChartData_S000006455Member column primary compact * row dei_LegalEntityAxis compact * row rr_ProspectusShareClassAxis compact * ~</div>falsehttp://www.TouchstoneInvestments.com/role/BarChartData_S000006455Memberfalsefalse01107 - Schedule - Annual Total Returnstruefalsefalse1falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*4false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.1998-0.1998falsefalsefalsetruefalseOtherxbrli: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 falsefalseAnnual Return 2002duration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*5false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.38090.3809falsefalsefalsetruefalseOtherxbrli: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 falsefalseAnnual Return 2003duration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*6false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.12520.1252falsefalsefalsetruefalseOtherxbrli: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 falsefalseAnnual Return 2004duration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*7false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.12750.1275falsefalsefalsetruefalseOtherxbrli: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 falsefalseAnnual Return 2005duration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$5falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*8false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.00210.0021falsefalsefalsetruefalseOtherxbrli: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 falsefalseAnnual Return 2006duration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$6falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*9false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.25510.2551falsefalsefalsetruefalseOtherxbrli: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 falsefalseAnnual Return 2007duration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$7falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*10false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.3044-0.3044falsefalsefalsetruefalseOtherxbrli: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 falsefalseAnnual Return 2008duration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$8falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*11false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.11050.1105falsefalsefalsetruefalseOtherxbrli: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 falsefalseAnnual Return 2009duration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$9falseColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*12false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.07240.0724falsefalsefalsetruefalseOtherxbrli: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 falsefalseAnnual Return 2010duration2011-04-19T00:00:002011-04-19T00:00:00iso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberfalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_C000017653Memberrr_ProspectusShareClassAxisexplicitMemberTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS A0truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.1998-0.1998falsefalsefalsetruefalse2truetruefalse0.38090.3809falsefalsefalsetruefalse3truetruefalse0.12520.1252falsefalsefalsetruefalse4truetruefalse0.12750.1275falsefalsefalsetruefalse5truetruefalse0.00210.0021falsefalsefalsetruefalse6truetruefalse0.25510.2551falsefalsefalsetruefalse7truetruefalse-0.3044-0.3044falsefalsefalsetruefalse8truetruefalse0.11050.1105falsefalsefalsetruefalse9truetruefalse0.07240.0724falsefalsefalsetruefalseOthernanafalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS A91Annual Total Returns UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*ColumnprimaryElement*ColumnunitUnit*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to BarChartData.No authoritative reference available.falsefalseBar Chart [Table]26false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<pre>Best Quarter: 2nd Quarter 2003 +12.52% Worst Quarter: 4th Quarter 2008 -20.26%</pre>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, Closing27false0rr_PerformanceTableNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<pre>After-tax returns are calculated using the highest individual federal income tax rate and do not reflect the impact of state and local taxes. Your after-tax returns may differ from those shown and depend on your tax situation. The after-tax returns do not apply to shares held in an IRA, 401(k) or other tax-deferred account. The after-tax returns shown in the table are for Class A shares only. The after-tax returns for other classes of shares offered by the Fund will differ from the Class A after-tax returns. The Class C inception date is November 20, 2006. The Class C shares performance was calculated using the historical performance of the Class A shares for the period from February 28, 2001 to November 20, 2006. Performance for this period has been restated to reflect the impact of Class C shares fees and expenses.</pre>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, Narrative28false0rr_AverageAnnualReturnCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00AVERAGE ANNUAL TOTAL RETURNS FOR THE PERIOD ENDED DECEMBER 31, 2010falsefalsefalsefalsefalseOtherxbrli: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 5 -Subsection b falsefalseAverage Annual Returns, Caption29false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="display:none">~ http://www.TouchstoneInvestments.com/role/PerformanceTableData_S000006455Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~</div>falsefalse<div style="display:none">~ http://www.TouchstoneInvestments.com/role/PerformanceTableData_S000006455Member column dei_LegalEntityAxis compact * column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~</div>truehttp://www.TouchstoneInvestments.com/role/PerformanceTableData_S000006455Memberfalsefalse01108 - Schedule - Average Annual Total Returns {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_AverageAnnualReturnLabelrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00CLASS A Return Before Taxesfalsefalsefalsetruefalse2falsetruefalse00CLASS A Return After Taxes on Distributions falsefalsefalsetruefalse3falsetruefalse00CLASS A Return After Taxes on Distributions and Sale of Fund Shares falsefalsefalsetruefalse4falsetruefalse00CLASS C Return Before Taxesfalsefalsefalsetruefalse5falsetruefalse00S & P 500 HEALTHCARE INDEX (reflects no deductions for fees, expenses or taxes)falsefalsefalsetruefalseOtherxbrli: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 falsefalseAverage Annual Returns, LabelfalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01040.0104falsefalsefalsetruefalse2truetruetrue0.01010.0101falsefalsefalsetruefalse3truetruetrue0.00720.0072falsefalsefalsetruefalse4truetruetrue0.06430.0643falsefalsefalsetruefalse5truetruetrue0.02900.0290falsefalsefalsetruefalseOtherxbrli: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 falsefalseAverage Annual Returns, 1 YearfalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0036-0.0036falsefalsefalsetruefalse2truetruetrue-0.0091-0.0091falsefalsefalsetruefalse3truetruetrue-0.0038-0.0038falsefalsefalsetruefalse4truetruetrue0.00080.0008falsefalsefalsetruefalse5truetruetrue0.01840.0184falsefalsefalsetruefalseOtherxbrli: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 falsefalseAverage Annual Returns, 5 YearsfalseUSDfalsefalse$4falseColumnprimaryElement*7false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.05350.0535falsefalsefalsetruefalse2truetruetrue0.04910.0491falsefalsefalsetruefalse3truetruetrue0.04590.0459falsefalsefalsetruefalse4truetruetrue0.00200.0020falsefalsefalsetruefalse5truetruetrue-0.0105-0.0105falsefalsefalsetruefalseOtherxbrli: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 falsefalseAverage Annual Returns, Since InceptionfalseUSDfalsefalse$5falseColumnprimaryElement*8false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse002001-02-28falsefalsetruetruefalse2falsetruefalse002001-02-28falsefalsetruetruefalse3falsetruefalse002001-02-28falsefalsetruetruefalse4falsetruefalse002001-02-28falsefalsetruetruefalse5falsetruefalse002001-02-28falsefalsetruetruefalseOtherxbrli: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 falsefalseAverage Annual Returns, Inception DatefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-19T00:00:002011-04-19T00:00:00falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberfalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_C000017653Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS ABefore Taxesiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00CLASS A Return Before TaxesCLASS A Return Before Taxesfalsefalsefalsetruefalse2truetruetrue0.01040.0104falsefalsefalsetruefalse3truetruetrue-0.0036-0.0036falsefalsefalsetruefalse4truetruetrue0.05350.0535falsefalsefalsetruefalse5falsetruefalse002001-02-282001-02-28falsefalsetruetruefalseOthernanafalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS A2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-19T00:00:002011-04-19T00:00:00falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberfalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_C000017653Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS AAfter Taxes on DistributionsStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00CLASS A Return After Taxes on Distributions CLASS A Return After Taxes on Distributionsfalsefalsefalsetruefalse2truetruetrue0.01010.0101falsefalsefalsetruefalse3truetruetrue-0.0091-0.0091falsefalsefalsetruefalse4truetruetrue0.04910.0491falsefalsefalsetruefalse5falsetruefalse002001-02-282001-02-28falsefalsetruetruefalseOthernanafalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS A After Taxes on Distributions3falseRowperiodPeriod*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-19T00:00:002011-04-19T00:00:00falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberfalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_C000017653Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributions and Salesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS AAfter Taxes on Distributions and SalesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00CLASS A Return After Taxes on Distributions and Sale of Fund Shares CLASS A Return After Taxes on Distributions and Sale of Fund Sharesfalsefalsefalsetruefalse2truetruetrue0.00720.0072falsefalsefalsetruefalse3truetruetrue-0.0038-0.0038falsefalsefalsetruefalse4truetruetrue0.04590.0459falsefalsefalsetruefalse5falsetruefalse002001-02-282001-02-28falsefalsetruetruefalseOthernanafalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - CLASS A After Taxes on Distributions and Sales4falseRowperiodPeriod*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-19T00:00:002011-04-19T00:00:00falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMemberfalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_C000039640Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - Class CBefore Taxesiso4217_USDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00CLASS C Return Before TaxesCLASS C Return Before Taxesfalsefalsefalsetruefalse2truetruetrue0.06430.0643falsefalsefalsetruefalse3truetruetrue0.00080.0008falsefalsefalsetruefalse4truetruetrue0.00200.0020falsefalsefalsetruefalse5falsetruefalse002001-02-282001-02-28falsefalsetruetruefalseOthernanafalsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND - Class C5falseRowperiodPeriod*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-19T00:00:002011-04-19T00:00:00falsefalseTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_S000006455Memberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseS & P 500 HEALTHCARE INDEXrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldick0000914243_RRINDEX00005Memberrr_PerformanceMeasureAxisexplicitMemberTOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDShare ClassesS & P 500 HEALTHCARE INDEXStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00S & P 500 HEALTHCARE INDEX (reflects no deductions for fees, expenses or taxes)S & P 500 HEALTHCARE INDEX (reflects no deductions for fees, expenses or taxes)falsefalsefalsetruefalse2truetruetrue0.02900.0290falsefalsefalsetruefalse3truetruetrue0.01840.0184falsefalsefalsetruefalse4truetruetrue-0.0105-0.0105falsefalsefalsetruefalse5falsetruefalse002001-02-282001-02-28falsefalsetruetruefalseOthernanafalsefalseS & P 500 HEALTHCARE INDEX55Average Annual Total Returns TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUNDUnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalsePerformance [Table]128Risk/Return Summary (TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND) (TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND (Prospectus Summary), TOUCHSTONE HEALTHCARE AND BIOTECHNOLOGY FUND)UnKnownUnKnownUnKnownUnKnownfalsetrue