2.2.0.25truefalse010000 - Document - Risk/Return Summary {Unlabeled}falsefalsetrue1falsefalseUSDtruefalse{dei_LegalEntityAxis} : TAX-FREE FUND OF COLORADO
4/24/2011 - 4/24/2011
USD ($)
$c1_S000009141Memberhttp://www.sec.gov/CIK0000811239duration2011-04-24T00:00:002011-04-24T00:00:00falsefalsetffc_S000009141Memberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170ratioStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDUSD$3false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00RISK/RETURNfalsefalsefalsefalsefalseOtherxbrli: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
falsefalse4false0rr_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
falsefalse5false0rr_ObjectivePrimaryTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The Fund’s objective is to provide you as high a level of current income exempt from Colorado state and regular Federal income taxes as is consistent with preservation of capital.</font></div>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
falsefalse6false0rr_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
falsefalse7false0rr_ExpenseNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">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 if you and your immediate family invest, or agree to invest in the future, at least $25,000 in the Fund or in other funds in the Aquila Group of Funds. More information about these and other discounts, as well as eligibility requirements for each share class, is available from your financial advisor and in “Alternative Purchase Plans” on page 18 of the Fund’s Prospectus, “What are the sales charges for purchases of Class A Shares” on page 19 of the Prospectus and “Reduced Sales Charges for Certain Purchases of Class A Shares” on page 21 of the Prospectus. No Class I Shares are currently outstanding.</font></div>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
falsefalse8false0rr_ShareholderFeesCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00fees paid directly from your investmentfalsefalsefalsefalsefalseOtherxbrli: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
falsefalse9false0rr_ShareholderFeesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact tffc_S000009141Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ShareholderFeesData column dei_LegalEntityAxis compact tffc_S000009141Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/ShareholderFeesDatafalsefalse020010 - Schedule - Shareholder Feestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxistffc_S000009141MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024860Memberrr_ProspectusShareClassAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxistffc_S000009141MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024861Memberrr_ProspectusShareClassAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_LegalEntityAxisAxistffc_S000009141MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024862Memberrr_ProspectusShareClassAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columndei_LegalEntityAxisAxistffc_S000009141MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024863Memberrr_ProspectusShareClassAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.04000.0400falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr: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
falsefalse0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.04000.0400falsefalsefalsetruefalse2truetruetrue0.00000.0000falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_MaximumDeferredSalesChargeOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000[1]falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr: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 2
-Subparagraph a
-Clause i
-Subsection instructions
falsefalse0rr_MaximumDeferredSalesChargeOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000[1]falsefalsefalsetruefalse2truetruetrue0.01000.0100falsefalsefalsetruefalse3truetruetrue0.00000.0000falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse1Purchases of $1 million or more have no sales charge but a contingent deferred sales charge of up to 1% for redemptions within two years of purchase and up to 0.50 of 1% for redemptions during the third and fourth years after purchase.42Shareholder Fees
TAX-FREE FUND OF COLORADOUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxistffc_S000009141MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No authoritative reference available.falsefalse10false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact tffc_S000009141Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/OperatingExpensesData column dei_LegalEntityAxis compact tffc_S000009141Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsehttp://xbrl.sec.gov/rr/role/OperatingExpensesDatafalsefalse020020 - Schedule - Annual Fund Operating Expensestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxistffc_S000009141MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024860Memberrr_ProspectusShareClassAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxistffc_S000009141MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024861Memberrr_ProspectusShareClassAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$3falseColumnperiodPeriod*Columndei_LegalEntityAxisAxistffc_S000009141MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024862Memberrr_ProspectusShareClassAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$4falseColumnperiodPeriod*Columndei_LegalEntityAxisAxistffc_S000009141MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024863Memberrr_ProspectusShareClassAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*3false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00500.0050falsefalsefalsetruefalse2truetruetrue0.00500.0050falsefalsefalsetruefalse3truetruetrue0.00500.0050falsefalsefalsetruefalse4truetruetrue0.00500.0050falsefalsefalsetruefalseOtherrr: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
falsefalse0rr_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00500.0050falsefalsefalsetruefalse2truetruetrue0.00500.0050falsefalsefalsetruefalse3truetruetrue0.00500.0050falsefalsefalsetruefalse4truetruetrue0.00500.0050falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00050.0005falsefalsefalsetruefalse2truetruetrue0.00750.0075falsefalsefalsetruefalse3truetruetrue0.00150.0015falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr: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
falsefalse0rr_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00050.0005falsefalsefalsetruefalse2truetruetrue0.00750.0075falsefalsefalsetruefalse3truetruetrue0.00150.0015falsefalsefalsetruefalse4truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*5false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00180.0018falsefalsefalsetruefalse2truetruetrue0.00420.0042falsefalsefalsetruefalse3truetruetrue0.00370.0037falsefalsefalsetruefalse4truetruetrue0.00170.0017falsefalsefalsetruefalseOtherrr: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
falsefalse0rr_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00180.0018falsefalsefalsetruefalse2truetruetrue0.00420.0042falsefalsefalsetruefalse3truetruetrue0.00370.0037falsefalsefalsetruefalse4truetruetrue0.00170.0017falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*6false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00730.0073falsefalsefalsetruefalse2truetruetrue0.01670.0167falsefalsefalsetruefalse3truetruetrue0.01020.0102falsefalsefalsetruefalse4truetruetrue0.00670.0067falsefalsefalsetruefalseOtherrr: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
falsefalse0rr_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00730.0073falsefalsefalsetruefalse2truetruetrue0.01670.0167falsefalsefalsetruefalse3truetruetrue0.01020.0102falsefalsefalsetruefalse4truetruetrue0.00670.0067falsefalsefalsetruefalseOthernanafalsefalse44Annual Fund Operating Expenses
TAX-FREE FUND OF COLORADOUnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxistffc_S000009141MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No authoritative reference available.falsefalse11false0rr_ExpenseExampleHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00ExamplefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringHeading for Expense Example.Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 3
-Paragraph 4
-Subsection instructions
falsefalse12false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.</font></div> <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">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.  The Example also assumes that your investment has a 5% return each year and that the Fund’s operating expenses remain the same. Six years after the date of purchase, Class C Shares automatically convert to Class A Shares. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</font></div>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
falsefalse13false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact tffc_S000009141Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ExpenseExample column dei_LegalEntityAxis compact tffc_S000009141Member column rr_ProspectusShareClassAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/ExpenseExamplefalsefalse020030 - Schedule - Expense Example {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue472472falsefalsefalsetruefalse2truefalsetrue270270falsefalsefalsetruefalse3truefalsetrue104104falsefalsefalsetruefalse4truefalsetrue6868falsefalsefalsetruefalseMonetaryrr: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
falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue624624falsefalsefalsetruefalse2truefalsetrue526526falsefalsefalsetruefalse3truefalsetrue325325falsefalsefalsetruefalse4truefalsetrue214214falsefalsefalsetruefalseMonetaryrr: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
falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue790790falsefalsefalsetruefalse2truefalsetrue907907falsefalsefalsetruefalse3truefalsetrue563563falsefalsefalsetruefalse4truefalsetrue373373falsefalsefalsetruefalseMonetaryrr: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
falsefalsefalseUSDfalsefalse$4falseColumnprimaryElement*6false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue12701270falsefalsefalsetruefalse2truefalsetrue14941494falsefalsefalsetruefalse3truefalsetrue12481248falsefalsefalsetruefalse4truefalsetrue835835falsefalsefalsetruefalseMonetaryrr: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
falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024860Memberrr_ProspectusShareClassAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class AusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue472472falsefalsefalsetruefalse2truefalsetrue624624falsefalsefalsetruefalse3truefalsetrue790790falsefalsefalsetruefalse4truefalsetrue12701270falsefalsefalsetruefalseOthernanafalsefalse2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024861Memberrr_ProspectusShareClassAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue270270falsefalsefalsetruefalse2truefalsetrue526526falsefalsefalsetruefalse3truefalsetrue907907falsefalsefalsetruefalse4truefalsetrue14941494falsefalsefalsetruefalseOthernanafalsefalse3falseRowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024862Memberrr_ProspectusShareClassAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class IusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue104104falsefalsefalsetruefalse2truefalsetrue325325falsefalsefalsetruefalse3truefalsetrue563563falsefalsefalsetruefalse4truefalsetrue12481248falsefalsefalsetruefalseOthernanafalsefalse4falseRowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024863Memberrr_ProspectusShareClassAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class YusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue6868falsefalsefalsetruefalse2truefalsetrue214214falsefalsefalsetruefalse3truefalsetrue373373falsefalsefalsetruefalse4truefalsetrue835835falsefalsefalsetruefalseOthernanafalsefalse44Expense Example
TAX-FREE FUND OF COLORADO
(USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalse14false0rr_ExpenseExampleNoRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact tffc_S000009141Member column rr_ProspectusShareClassAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemption column dei_LegalEntityAxis compact tffc_S000009141Member column rr_ProspectusShareClassAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/ExpenseExampleNoRedemptionfalsefalse020040 - Schedule - Expense Example, No Redemption {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_ExpenseExampleNoRedemptionYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue170170falsefalsefalsetruefalseMonetaryrr: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
falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_ExpenseExampleNoRedemptionYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue526526falsefalsefalsetruefalseMonetaryrr: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
falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_ExpenseExampleNoRedemptionYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue907907falsefalsefalsetruefalseMonetaryrr: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
falsefalsefalseUSDfalsefalse$4falseColumnprimaryElement*6false0rr_ExpenseExampleNoRedemptionYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truefalsetrue14941494falsefalsefalsetruefalseMonetaryrr: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
falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024861Memberrr_ProspectusShareClassAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class CusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue170170falsefalsefalsetruefalse2truefalsetrue526526falsefalsefalsetruefalse3truefalsetrue907907falsefalsefalsetruefalse4truefalsetrue14941494falsefalsefalsetruefalseOthernanafalsefalse41Expense Example, No Redemption
(USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExampleNoRedemption.No authoritative reference available.falsefalse15false0rr_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
falsefalse16false0rr_PortfolioTurnoverTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The 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 14.44 % of the average value of its portfolio.</font></div>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
falsefalse17false0rr_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
falsefalse18false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The Fund invests in tax-free municipal obligations which pay interest exempt from Colorado state and regular Federal income taxes. We call these “Colorado Obligations.” In general, all or almost all of these obligations are issued by the State of Colorado, its counties and various other local authorities. At least 80% of the Fund’s assets will always consist of Colorado obligations of these issuers. These obligations can be of any maturity, but the Fund’s average portfolio maturity has traditionally been between 6 and 12 years.</font></div> <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">At the time of purchase, the Fund’s Colorado Obligations must be of investment grade quality. This means that they must either</font></div> <table cellpadding="0" cellspacing="0" id="list" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr valign="top"> <td align="right" style="WIDTH: 54pt"> <div><font style="display: inline; font-size: 10pt; font-family: Symbol, serif;">·  </font></div> </td> <td> <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">be rated within the four highest credit ratings assigned by nationally recognized statistical rating organizations or,</font></div> </td> </tr> </table> <table cellpadding="0" cellspacing="0" id="list-0" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr valign="top"> <td align="right" style="WIDTH: 54pt"> <div><font style="display: inline; font-size: 10pt; font-family: Symbol, serif;">·  </font></div> </td> <td> <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: times new roman">if unrated, be determined to be of comparable quality by the Fund’s Sub-Adviser, Davidson Fixed Income Management, Inc. doing business as Kirkpatrick Pettis Capital Management (the “Sub-Adviser”).</font></div> </td> </tr> </table> <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The Sub-Adviser selects obligations for the Fund’s portfolio to best achieve the Fund’s objective by considering various characteristics including quality, maturity and coupon rate.</font></div>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
falsefalse19false0rr_RiskHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Principal RisksfalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 4
-Paragraph 1
-Subsection b
falsefalse20false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The Fund’s assets, being primarily or entirely Colorado issues, are subject to economic and other conditions affecting Colorado. Adverse local events, such as the current downturn in the Colorado economy and continued high unemployment, could affect the value of the Fund’s portfolio. (See “What are the main risk factors and special considerations specifically relating to investment in Colorado Issuers?” in the Fund’s Prospectus.)</font></div> <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">There are two types of risk associated with any fixed-income debt securities such as Colorado Obligations: interest rate risk and credit risk.</font></div> <table cellpadding="0" cellspacing="0" id="list-1" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr valign="top"> <td align="right" style="WIDTH: 54pt"> <div><font style="display: inline; font-size: 10pt; font-family: Symbol, serif;">·  </font></div> </td> <td> <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Interest rate risk relates to fluctuations in market value arising from changes in prevailing interest rates. If interest rates rise, the value of debt securities, including Colorado Obligations, will normally decline. If the value of Colorado Obligations held by the Fund declines, the net asset value of your shares in the Fund will also decline. Colorado Obligations with longer maturities generally have a more pronounced reaction to interest rate changes than shorter-term securities.</font></div> </td> </tr> </table> <table cellpadding="0" cellspacing="0" id="list-2" width="100%" style="FONT-SIZE: 10pt; FONT-FAMILY: times new roman; FONT-SIZE: 10pt; FONT-FAMILY: times new roman"> <tr valign="top"> <td align="right" style="WIDTH: 54pt"> <div><font style="display: inline; font-size: 10pt; font-family: Symbol, serif;">·  </font></div> </td> <td> <div style="MARGIN-LEFT: 0pt; TEXT-INDENT: 0pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Credit risk relates to the ability of the particular issuers of the Colorado Obligations the Fund owns to make periodic interest payments as scheduled and ultimately repay principal at maturity.</font></div> </td> </tr> </table> <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The Fund is classified as a “non-diversified” investment company under the Investment Company Act of 1940 (the “1940 Act”). Thus, compared with “diversified” funds, it may invest a greater percentage of its assets in obligations of a particular issuer. In general, the more the Fund invests in the securities of specific issuers, the more the Fund is exposed to risks associated with investments in those issuers.</font></div> <div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">Loss of money is a risk of investing in the Fund.</font></div>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
falsefalse21false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Fund 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
falsefalse22false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">The following bar chart and table provide 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 returns for the designated periods compare with those of a broad measure of market performance. The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Updated performance information is available at <font style="DISPLAY: inline; TEXT-DECORATION: underline">www.aquilafunds.com</font> or by calling <font style="DISPLAY: inline; FONT-WEIGHT: bold">800-437-1020 (toll-free).</font></font></div>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
falsefalse23false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00ANNUAL TOTAL RETURNS Class Y Shares 2001 - 2010falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 4
-Paragraph 2
-Subsection b
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-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 4
-Paragraph 2
-Subparagraph ii
-Subsection b
falsefalse0rr_AnnualReturn2001truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.04590.0459falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*4false0rr_AnnualReturn2002rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.09500.0950falsefalsefalsetruefalseOtherxbrli: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
falsefalse0rr_AnnualReturn2002truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.09500.0950falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*5false0rr_AnnualReturn2003rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.04370.0437falsefalsefalsetruefalseOtherxbrli: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
falsefalse0rr_AnnualReturn2003truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.04370.0437falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*6false0rr_AnnualReturn2004rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.02730.0273falsefalsefalsetruefalseOtherxbrli: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
falsefalse0rr_AnnualReturn2004truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.02730.0273falsefalsefalsetruefalseOthernanafalsefalse5falseRowprimaryElement*7false0rr_AnnualReturn2005rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.01490.0149falsefalsefalsetruefalseOtherxbrli: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
falsefalse0rr_AnnualReturn2005truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.01490.0149falsefalsefalsetruefalseOthernanafalsefalse6falseRowprimaryElement*8false0rr_AnnualReturn2006rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.03260.0326falsefalsefalsetruefalseOtherxbrli: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
falsefalse0rr_AnnualReturn2006truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.03260.0326falsefalsefalsetruefalseOthernanafalsefalse7falseRowprimaryElement*9false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.03170.0317falsefalsefalsetruefalseOtherxbrli: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
falsefalse0rr_AnnualReturn2007truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.03170.0317falsefalsefalsetruefalseOthernanafalsefalse8falseRowprimaryElement*10false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.00630.0063falsefalsefalsetruefalseOtherxbrli: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
falsefalse0rr_AnnualReturn2008truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.00630.0063falsefalsefalsetruefalseOthernanafalsefalse9falseRowprimaryElement*11false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.09470.0947falsefalsefalsetruefalseOtherxbrli: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
falsefalse0rr_AnnualReturn2009truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.09470.0947falsefalsefalsetruefalseOthernanafalsefalse10falseRowprimaryElement*12false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.01440.0144falsefalsefalsetruefalseOtherxbrli: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
falsefalse0rr_AnnualReturn2010truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.01440.0144falsefalsefalsetruefalseOthernanafalsefalse110Annual Total Returns
UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_LegalEntityAxisAxistffc_S000009141MemberColumnrr_ProspectusShareClassAxisAxistffc_C000024860MemberColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to BarChartData.No authoritative reference available.falsefalse25false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="left"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">During the period shown in the bar chart, the highest return for a quarter was 4.37% (quarter ended September 30, 2009) and the lowest return for a quarter was –2.39% (quarter ended June 30, 2004).</font></div>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
falsefalse26false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact tffc_S000009141Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~falsefalse~ http://xbrl.sec.gov/rr/role/PerformanceTableData column dei_LegalEntityAxis compact tffc_S000009141Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row primary compact * ~truehttp://xbrl.sec.gov/rr/role/PerformanceTableDatafalsefalse020060 - Schedule - Average Annual Total Returns {Transposed}truefalsefalse1falseColumnprimaryElement*3false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0264-0.0264falsefalsefalsetruefalse2truetruetrue-0.0058-0.0058falsefalsefalsetruefalse3truetruetrue0.01440.0144falsefalsefalsetruefalse4truetruetrue0.01440.0144falsefalsefalsetruefalse5truetruetrue0.02320.0232falsefalsefalsetruefalse6truetruetrue0.03210.0321falsefalsefalsetruefalseOtherxbrli: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
falsefalsefalseUSDfalsefalse$2falseColumnprimaryElement*4false0rr_AverageAnnualReturnYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.02660.0266falsefalsefalsetruefalse2truetruetrue0.02510.0251falsefalsefalsetruefalse3truetruetrue0.03550.0355falsefalsefalsetruefalse4truetruetrue0.03500.0350falsefalsefalsetruefalse5truetruetrue0.03580.0358falsefalsefalsetruefalse6truetruetrue0.04730.0473falsefalsefalsetruefalseOtherxbrli: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
falsefalsefalseUSDfalsefalse$3falseColumnprimaryElement*5false0rr_AverageAnnualReturnYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03550.0355falsefalsefalsetruefalse2truetruetrue0.02980.0298falsefalsefalsetruefalse3truetruetrue0.04020.0402falsefalsefalsetruefalse4truetruetrue0.03960.0396falsefalsefalsetruefalse5truetruetrue0.03990.0399falsefalsefalsetruefalse6truetruetrue0.04760.0476falsefalsefalsetruefalseOtherxbrli: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
falsefalsefalseUSDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Arr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024860Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class ABefore TaxesusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0264-0.0264falsefalsefalsetruefalse2truetruetrue0.02660.0266falsefalsefalsetruefalse3truetruetrue0.03550.0355falsefalsefalsetruefalseOthernanafalsefalse2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Crr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024861Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class CBefore TaxesusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue-0.0058-0.0058falsefalsefalsetruefalse2truetruetrue0.02510.0251falsefalsefalsetruefalse3truetruetrue0.02980.0298falsefalsefalsetruefalseOthernanafalsefalse3falseRowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024863Memberrr_ProspectusShareClassAxisexplicitMembertruefalseBefore Taxesrr_PerformanceMeasureAxisrr_PerformanceMeasureDomainrr_PerformanceMeasureAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class YBefore TaxesusdStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01440.0144falsefalsefalsetruefalse2truetruetrue0.03550.0355falsefalsefalsetruefalse3truetruetrue0.04020.0402falsefalsefalsetruefalseOthernanafalsefalse4falseRowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024863Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributionsrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsMemberrr_PerformanceMeasureAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class YAfter Taxes on DistributionsStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.01440.0144falsefalsefalsetruefalse2truetruetrue0.03500.0350falsefalsefalsetruefalse3truetruetrue0.03960.0396falsefalsefalsetruefalseOthernanafalsefalse5falseRowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMemberfalsefalseTax-Free Fund of Colorado Class Yrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrlditffc_C000024863Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributions and Salesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberTAX-FREE FUND OF COLORADOTax-Free Fund of Colorado Class YAfter Taxes on Distributions and SalesStandard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.02320.0232falsefalsefalsetruefalse2truetruetrue0.03580.0358falsefalsefalsetruefalse3truetruetrue0.03990.0399falsefalsefalsetruefalseOthernanafalsefalse6falseRowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*duration2011-04-24T00:00:002011-04-24T00:00:00falsefalseTAX-FREE FUND OF COLORADOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrlditffc_S000009141Memberdei_LegalEntityAxisexplicitMembertruefalseShare Classesrr_ProspectusShareClassAxisrr_ShareClassDomainrr_ProspectusShareClassAxisexplicitMemberfalsefalseBarclays Capital Quality Intermediate Municipal Bond Index (This index is unmanaged and does not reflect deductions for fund operating expenses or sales charges.)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrlditffc_Barclays_Capital_Quality_Intermediate_Municipal_Bond_Index_This_index_is_unmanaged_and_does_not_reflect_deductions_for_fund_operating_expenses_or_sales_chargesMemberrr_PerformanceMeasureAxisexplicitMemberTAX-FREE FUND OF COLORADOShare ClassesBarclays Capital Quality Intermediate Municipal Bond Index (This index is unmanaged and does not reflect deductions for fund operating expenses or sales charges.)Standard00truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.03210.0321falsefalsefalsetruefalse2truetruetrue0.04730.0473falsefalsefalsetruefalse3truetruetrue0.04760.0476falsefalsefalsetruefalseOthernanafalsefalse36Average Annual Total Returns
TAX-FREE FUND OF COLORADOUnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxistffc_S000009141MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalse27false0rr_PerformanceTableClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div style="DISPLAY: block; MARGIN-LEFT: 0pt; TEXT-INDENT: 36pt; MARGIN-RIGHT: 0pt" align="justify"><font style="DISPLAY: inline; FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman">These returns are calculated using the highest individual Federal income and capital gains tax rates in effect at the time of each distribution and redemption, but do not reflect state and local taxes.  Actual after-tax returns will depend on your specific situation and may differ from those shown.  The after-tax returns shown will be irrelevant to investors owning shares through tax-deferred accounts, such as IRAs or 401(k) plans.  The total returns reflect reinvestment of dividends and distributions.</font></div> 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, _____)Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 4
-Paragraph 2
-Subparagraph iii
-Subsection b
falsefalse125Risk/Return Summary (TAX-FREE FUND OF COLORADO)UnKnownUnKnownUnKnownUnKnownfalsetrue