2.2.0.25truefalse0100042 - Document - Risk/Return Summary - Sterling Capital National Tax-Free Money Market Fund (Class Institutional){Unlabeled}falsefalsetrue1falsefalsetruefalse{dei_DocumentInformationDocumentAxis} : Sterling Capital National Tax-Free Money Market Fund
{dei_LegalEntityAxis} : Prospectus, Institutional Class
2/2/2010 - 2/1/2011
TwelveMonthsEnded_01Feb2011_S000012847_Member_Prospectus_Two_Institutional_Class_Memberhttp://www.sec.gov/CIK0000889284duration2010-02-02T00:00:002011-02-01T00:00:00falsefalsebicax_S000012847Memberdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldibicax_S000012847Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalsebicax_ProspectusTwoInstitutionalClassMemberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldibicax_ProspectusTwoInstitutionalClassMemberdei_LegalEntityAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli01false0natruenanaNo definition available.falsetruefalsefalsefalsefalsefalsefalsefalsefalsehttp://bbtfunds.com/role/riskreturnsummarysterlingcapitalnationaltaxfreemoneymarketfundclassinstitutional1falsefalsefalse00Sterling Capital National Tax-Free Money Market Fund | Prospectus, Institutional ClassSterling Capital National Tax-Free Money Market Fund | Prospectus, Institutional Classfalsefalsefalsefalsefalse1falsefalsetruefalse{dei_DocumentInformationDocumentAxis} : Sterling Capital National Tax-Free Money Market Fund
{dei_LegalEntityAxis} : Prospectus, Institutional Class
2/2/2010 - 2/1/2011
TwelveMonthsEnded_01Feb2011_S000012847_Member_Prospectus_Two_Institutional_Class_Memberhttp://www.sec.gov/CIK0000889284duration2010-02-02T00:00:002011-02-01T00:00:00falsefalsebicax_S000012847Memberdei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldibicax_S000012847Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalsebicax_ProspectusTwoInstitutionalClassMemberdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldibicax_ProspectusTwoInstitutionalClassMemberdei_LegalEntityAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0OthernaNo definition available.No authoritative reference available.falsefalse3false0rr_RiskReturnHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Summary Sterling Capital National Tax-Free Money Market Fund (formerly BB&T National Tax-Free Money Market Fund)falsefalsefalsefalsefalseOtherxbrli: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.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00The Fund seeks to provide dividend income exempt from federal regular income tax consistent with stability of principal.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.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Fee TablefalsefalsefalsefalsefalseOtherxbrli: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.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00This table describes the fees and expenses that you may pay if you buy and hold shares of the Fund.falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown.The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 3
-Paragraph 1
-Subparagraph b
-Subsection instructions
falsefalse8false0rr_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
falsefalse9false0rr_ShareholderFeesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div style="display:none;" >~ http://bbtfunds.com/role/ShareholderFeesSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact bicax_S000012847_Member * row rr_DocumentInformationDocumentAxis compact bicax_Prospectus_Two_Institutional_Class_Member * ~</div> </div>falsefalse<div> <div style="display:none;" >~ http://bbtfunds.com/role/ShareholderFeesSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact bicax_S000012847_Member * row rr_DocumentInformationDocumentAxis compact bicax_Prospectus_Two_Institutional_Class_Member * ~</div> </div>falsehttp://bbtfunds.com/role/ShareholderFeesSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutionalfalsefalse0200142 - Schedule - Shareholder Fees - Sterling Capital National Tax-Free Money Market Fund (Class Institutional)truefalsefalse1falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-02T00:00:002011-02-01T00:00:00falsefalseSterling Capital National Tax-Free Money Market Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldibicax_S000012847Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseProspectus, Institutional Classdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldibicax_ProspectusTwoInstitutionalClassMemberdei_LegalEntityAxisexplicitMemberfalsefalseClass Institutional, Sterling Capital National Tax-Free Money Market Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldibicax_C000034744Memberrr_ProspectusShareClassAxisexplicitMemberSterling Capital National Tax-Free Money Market FundProspectus, Institutional ClassClass Institutional, Sterling Capital National Tax-Free Money Market FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*4false0rr_ShareholderFeesColumnNamerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Institutional SharesfalsefalsefalsetruefalseOtherus-types:textBlockItemTypestringShareholder 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
falsefalse0rr_ShareholderFeesColumnNametruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Institutional SharesInstitutional SharesfalsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*5false0rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPricerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr: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_MaximumSalesChargeImposedOnPurchasesOverOfferingPricetruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*6false0rr_MaximumDeferredSalesChargeOverOtherrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseterselabel1truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureMaximum Deferred Sales Charge (Load) (as a percentage of ____) "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). 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_MaximumDeferredSalesChargeOverOthertruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*7false0rr_RedemptionFeeOverRedemptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsetruenegated1truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr:NonPositivePure4Typepure"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 2
-Subparagraph b
-Subsection instructions
falsefalse0rr_RedemptionFeeOverRedemptiontruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse14Shareholder Fees - Sterling Capital National Tax-Free Money Market Fund (Class Institutional)
UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*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.falsefalse10false0rr_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
falsefalse11false0rr_AnnualFundOperatingExpensesTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div style="display:none;" >~ http://bbtfunds.com/role/AnnualFundOperatingExpensesSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact bicax_Prospectus_Two_Institutional_Class_Member * row rr_DocumentInformationDocumentAxis compact bicax_S000012847_Member * ~</div>falsefalse<div> <div style="display:none;" >~ http://bbtfunds.com/role/AnnualFundOperatingExpensesSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact bicax_Prospectus_Two_Institutional_Class_Member * row rr_DocumentInformationDocumentAxis compact bicax_S000012847_Member * ~</div>falsehttp://bbtfunds.com/role/AnnualFundOperatingExpensesSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutionalfalsefalse0200242 - Schedule - Annual Fund Operating Expenses - Sterling Capital National Tax-Free Money Market Fund (Class Institutional)truefalsefalse1falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-02T00:00:002011-02-01T00:00:00falsefalseSterling Capital National Tax-Free Money Market Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldibicax_S000012847Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseProspectus, Institutional Classdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldibicax_ProspectusTwoInstitutionalClassMemberdei_LegalEntityAxisexplicitMemberfalsefalseClass Institutional, Sterling Capital National Tax-Free Money Market Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldibicax_C000034744Memberrr_ProspectusShareClassAxisexplicitMemberSterling Capital National Tax-Free Money Market FundProspectus, Institutional ClassClass Institutional, Sterling Capital National Tax-Free Money Market FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*4false0rr_OperatingExpensesColumnNamerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Institutional SharesfalsefalsefalsetruefalseOtherus-types:textBlockItemTypestringAnnual 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
falsefalse0rr_OperatingExpensesColumnNametruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Institutional SharesInstitutional SharesfalsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*5false0rr_ManagementFeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.00250.0025falsefalsefalsetruefalseOtherrr: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_ManagementFeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00250.0025falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*6false0rr_DistributionAndService12b1FeesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.00000.0000falsefalsefalsetruefalseOtherrr: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_DistributionAndService12b1FeesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00000.0000falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*7false0rr_OtherExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.00230.0023falsefalsefalsetruefalseOtherrr: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_OtherExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00230.0023falsefalsefalsetruefalseOthernanafalsefalse5falseRowprimaryElement*9false0rr_ExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.00480.0048falsefalsefalsetruefalseOtherrr: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_ExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruetrue0.00480.0048falsefalsefalsetruefalseOthernanafalsefalse6falseRowprimaryElement*10false0rr_FeeWaiverOrReimbursementOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue-0.0005-0.0005[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
falsefalse0rr_FeeWaiverOrReimbursementOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue-0.0005-0.0005falsefalsefalsetruefalseOthernanafalsefalse7falseRowprimaryElement*11false0rr_NetExpensesOverAssetsrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruetrue0.00430.0043[1]falsefalsefalsetruefalseOtherrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 3
-Paragraph 1
-Subparagraph 11
-Subsection table
falsefalse0rr_NetExpensesOverAssetstruefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse[1]1truetruetrue0.00430.0043falsefalsefalsetruefalseOthernanafalsefalse1The Adviser has contractually agreed to limit the advisory fees paid by the Fund to 0.20% (the "Advisory Fee Limit") for the period from March 1, 2009 through February 29, 2012. From March 1, 2010 through February 29, 2012 the Adviser may recoup from the Fund all or a portion of the advisory fees that it voluntarily waives beyond the Advisory Fee Limit during the period from March 1, 2009 through February 29, 2012 (the "Recoupment Amount"), subject to certain limitations. The Adviser may not recoup any amount from the Fund if the Recoupment Amount plus the Advisory Fee Limit would exceed the Management Fee noted above. This contractual limitation will automatically terminate upon termination of the Investment Advisory Agreement or the Administration Agreement between the Fund and the Adviser/Administrator. 17Annual Fund Operating Expenses - Sterling Capital National Tax-Free Money Market Fund (Class Institutional)
UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*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.falsefalse12false0rr_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
falsefalse13false0rr_ExpenseExampleNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>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 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, except for the expiration of the current advisory fee limitation on February 29, 2012. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</p>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
falsefalse14false0rr_ExpenseExampleWithRedemptionTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div style="display:none;" >~ http://bbtfunds.com/role/ExpenseExampleSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact bicax_Prospectus_Two_Institutional_Class_Member * row rr_DocumentInformationDocumentAxis compact bicax_S000012847_Member * ~</div>falsefalse<div> <div style="display:none;" >~ http://bbtfunds.com/role/ExpenseExampleSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact bicax_Prospectus_Two_Institutional_Class_Member * row rr_DocumentInformationDocumentAxis compact bicax_S000012847_Member * ~</div>truehttp://bbtfunds.com/role/ExpenseExampleSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutionalfalsefalse0200342 - Schedule - Expense Example - Sterling Capital National Tax-Free Money Market Fund (Class Institutional){Transposed}truefalsefalse1falseColumnprimaryElement*4false0rr_ExpenseExampleByYearColumnNamerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Institutional SharesfalsefalsefalsetruefalseOtherus-types:textBlockItemTypestringThe 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$2falseColumnprimaryElement*5false0rr_ExpenseExampleYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue4444falsefalsefalsetruefalseMonetaryrr: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$3falseColumnprimaryElement*6false0rr_ExpenseExampleYear03rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue149149falsefalsefalsetruefalseMonetaryrr: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*7false0rr_ExpenseExampleYear05rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue264264falsefalsefalsetruefalseMonetaryrr: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$5falseColumnprimaryElement*8false0rr_ExpenseExampleYear10rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truefalsetrue599599falsefalsefalsetruefalseMonetaryrr: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_DocumentInformationDocumentAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2010-02-02T00:00:002011-02-01T00:00:00falsefalseSterling Capital National Tax-Free Money Market Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldibicax_S000012847Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseProspectus, Institutional Classdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldibicax_ProspectusTwoInstitutionalClassMemberdei_LegalEntityAxisexplicitMemberfalsefalseClass Institutional, Sterling Capital National Tax-Free Money Market Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldibicax_C000034744Memberrr_ProspectusShareClassAxisexplicitMemberSterling Capital National Tax-Free Money Market FundProspectus, Institutional ClassClass Institutional, Sterling Capital National Tax-Free Money Market FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso421700truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Institutional SharesInstitutional Sharesfalsefalsefalsetruefalse2truefalsetrue4444falsefalsefalsetruefalse3truefalsetrue149149falsefalsefalsetruefalse4truefalsetrue264264falsefalsefalsetruefalse5truefalsetrue599599falsefalsefalsetruefalseOthernanafalsefalse51Expense Example - Sterling Capital National Tax-Free Money Market Fund (Class Institutional)
(USD $)UnKnownUnKnownUnKnownUnKnownfalsetrueColumnprimaryElement*RowperiodPeriod*Rowdei_DocumentInformationDocumentAxisAxis*Rowdei_LegalEntityAxisAxis*Rowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No authoritative reference available.falsefalse15false0rr_StrategyHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Principal StrategyfalsefalsefalsefalsefalseOtherxbrli: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
falsefalse16false0rr_StrategyNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>To pursue its investment objective, the Fund invests, under normal circumstances, at least 80% of its net assets plus borrowings for investment purposes in investments, the income of which is exempt from federal income tax. The Fund invests, under normal market conditions, primarily in a portfolio of short-term, high-quality, tax-exempt securities issued by states and political subdivisions, industrial and economic development authorities, school and college authorities, housing authorities, healthcare facility authorities, municipal utilities, transportation authorities and other public agencies. The Fund will principally invest in the following securities: (a) tax-exempt securities such as the following types, some of which may be subject to credit enhancement: variable rate demand instruments, municipal notes, general obligation bonds, special revenue bonds, private activity bonds, and tax-exempt commercial paper; and (b) interests in securities of other investment companies. The Fund will invest its assets so that, normally, distributions of annual interest income are exempt from federal regular income tax and the federal alternative minimum tax for individuals and corporations. The Fund also may invest in securities of other investment companies.</p><p>The Fund will maintain a dollar-weighted average maturity of 90 days or less and will limit the maturity of each security in its portfolio to 397 days or less.</p><p>The Fund generally holds portfolio securities until such securities mature, but may dispose of securities (1) that fail to meet the investment adviser’s credit quality criteria, (2) to effect greater overall diversification of the Fund’s portfolio, or (3) to the extent required by Rule 2a-7 under the Investment Company Act of 1940.</p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 4
-Subsection a
falsefalse17false0rr_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
falsefalse18false0rr_RiskNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>Below are all of the principal risks of investing in the Fund.</p>
<p><b>Interest Rate Risk:</b> The possibility that the value of the Fund’s investments will decline due to an increase in interest rates. Interest rate risk is generally high for longer-term bonds and low for shorter-term bonds. Certain of the Fund’s investments may be valued, in part, by reference to the relative relationship between interest rates on tax-exempt securities and taxable securities, respectively. When the market for tax-exempt securities underperforms (or outperforms) the market for taxable securities, the value of these investments may be negatively affected (or positively affected). Certain factors, such as the presence of call features, also may cause a particular security invested in by the Fund, or the Fund as a whole, to exhibit less sensitivity to changes in interest rates.</p>
<p><b>Credit Risk:</b> The possibility that an issuer cannot make timely interest and principal payments on its debt securities, such as bonds. The lower a security’s rating, the greater its credit risk. Credit ratings do not provide assurance against default or other loss of money. If a security has not received a rating, the Fund must rely entirely upon the adviser’s or sub-adviser’s credit assessment.</p>
<p><b>Tax Risk:</b> The risk that the issuer of the securities will fail to comply with certain requirements of the Internal Revenue Code, which would cause adverse tax consequences. Changes or proposed changes in federal or state tax laws may cause the prices of tax-exempt securities to fall and/or may affect the tax-exempt status of the securities in which the Fund invests.</p>
<p><b>Counterparty Risk:</b> The possibility that a counterparty to a contract will default or otherwise become unable to honor a financial obligation. This could cause the Fund to lose the benefit of a transaction or prevent the Fund from selling or buying other securities to implement its investment strategies.</p>
<p><b>Prepayment/Call Risk:</b> When mortgages and other obligations are prepaid and when securities are called, the Fund may have to reinvest in securities with a lower yield or fail to recover additional amounts (<i>i.e.</i>, premiums) paid for securities with higher interest rates, resulting in an unexpected capital loss. Some of these securities may receive little or no collateral protection from the underlying assets and are thus subject to the risk of default described under “Credit Risk”. The risk of such defaults is generally higher in the case of mortgage-backed investments that include so-called “sub-prime” mortgages. Also, when interest rates fall, the price of municipal mortgage-backed securities may not rise to as great an extent as that of other fixed-income securities. The structure of some of these securities may be complex and there may be less available information than other types of debt securities. In both cases, investors receive their principal back and are typically forced to reinvest it in bonds that pay lower interest rates or that have greater credit risk or other less favorable characteristics. Rapid changes in prepayment and call rates can cause bond prices and yields to be volatile.</p>
<p><b>Sector Risks:</b> A substantial part of the Fund’s portfolio may be comprised of securities credit enhanced by companies in similar businesses or with similar characteristics. As a result, the Fund will be more susceptible to any economic, business, political or other developments which generally affect these companies. Developments affecting these companies might include changes in interest rates, changes in economic cycles affecting credit losses and regulatory changes.</p>
<p><b>Credit Enhancement Risk:</b> The securities in which the Fund invests may be subject to credit enhancement (for example, guarantees, letters of credit or bond insurance). If the credit quality of the credit enhancement provider (for example, a bank or bond insurer) is downgraded, the rating on a security credit enhanced by such credit enhancement provider also may be downgraded. Having multiple securities credit-enhanced by the same enhancement provider will increase the adverse effects on the Fund that are likely to result from a downgrading of, or a default by, such an enhancement provider. Adverse developments in the banking or bond insurance industries also may negatively affect the Fund.</p>
<p><b>Risks Associated with Investing Share Proceeds:</b> On days during which there are net purchases of Fund shares, the Fund must invest the proceeds at prevailing market yields or hold cash. If the Fund holds cash, or if the yield of the securities purchased is less than that of the securities already in the portfolio, the Fund’s yield will likely decrease. Conversely, net purchases on days on which short term yields rise will cause the Fund’s yield to increase. The larger the amount that must be invested or the greater the difference between the yield of the securities purchased and the yield of existing investments, the greater the impact will be on the yield of the Fund. In the event of significant changes in short term yields or significant net purchases, the Fund retains the discretion to close to new investments. However, the Fund is not required to close, and no assurance can be given that this will be done in any given circumstance.</p>
<p><b>Risks Associated with the Use of Amortized Cost:</b> In the unlikely event that the Fund’s Board of Trustees (“Board”) were to determine, pursuant to Rule 2a-7 of the Investment Company Act of 1940, that the extent of the deviation between the Fund’s amortized cost per share and its market-based net asset value per share may result in material dilution or other unfair results to shareholders, the Board will cause the Fund to take such action as it deems appropriate to eliminate or reduce, to the extent reasonably practicable, such dilution or unfair results, including, but not limited to, considering suspending redemption of shares and liquidating the Fund.</p>
<p><b>Changing Distribution Levels Risk:</b> There is no guarantee that the Fund will provide a certain level of income or that any such income will exceed the rate of inflation. Further, the Fund’s yield will vary. A low interest rate environment may prevent the Fund from providing a positive yield or paying Fund expenses out of current income and could impair the Fund’s ability to maintain a stable net asset value.</p>
<p>For more information about the Fund’s risks, please see the Fund’s prospectus or statement of additional information.</p>
<p><b>An investment in the Fund is not a deposit or an obligation of Branch Banking and Trust Company, BB&T Corporation, their affiliates, or any bank. Also, your investment is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Although the Fund seeks to preserve the value of your investment at $1 per share, it is possible to lose money by investing in the Fund.</b></p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 4
-Paragraph 1
-Subparagraph i
-Clause instruction
-Subsection b
falsefalse19false0rr_BarChartAndPerformanceTableHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00PerformancefalsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 4
-Paragraph 2
-Subsection b
falsefalse20false0rr_PerformanceNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>The following bar chart and table provide some indication of the risks of investing in the Fund. The bar chart shows changes in the Fund’s performance from year to year. The table shows the Fund’s average annual returns for 1 year and since the Fund’s inception. The Fund’s past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. <i>Updated performance information is available at no cost by visiting www.sterlingcapitalfunds.com or by calling 1-800-228-1872.</i></p>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
falsefalse21false0rr_BarChartHeadingrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Institutional Shares Annual Total Returns for years ended 12/31falsefalsefalsefalsefalseOtherxbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 4
-Paragraph 2
-Subsection b
falsefalse22false0rr_BarChartTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div style="display:none;" >~ http://bbtfunds.com/role/AnnualTotalReturnsBarChartSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact bicax_Prospectus_Two_Institutional_Class_Member * row rr_DocumentInformationDocumentAxis compact bicax_S000012847_Member * ~</div>falsefalseBarChart43.jpg<div> <div style="display:none;" >~ http://bbtfunds.com/role/AnnualTotalReturnsBarChartSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutional column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact bicax_Prospectus_Two_Institutional_Class_Member * row rr_DocumentInformationDocumentAxis compact bicax_S000012847_Member * ~</div>falsehttp://bbtfunds.com/role/AnnualTotalReturnsBarChartSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutionalfalsefalse0200542 - Schedule - Annual Total Returns (Bar Chart) - Sterling Capital National Tax-Free Money Market Fund (Class Institutional)truefalsefalse1falseColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2010-02-02T00:00:002011-02-01T00:00:00falsefalseSterling Capital National Tax-Free Money Market Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldibicax_S000012847Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseProspectus, Institutional Classdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldibicax_ProspectusTwoInstitutionalClassMemberdei_LegalEntityAxisexplicitMemberfalsefalseClass Institutional, Sterling Capital National Tax-Free Money Market Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldibicax_C000034744Memberrr_ProspectusShareClassAxisexplicitMemberSterling Capital National Tax-Free Money Market FundProspectus, Institutional ClassClass Institutional, Sterling Capital National Tax-Free Money Market FundUSDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170falseUSDfalsefalse$1falseRowprimaryElement*4false0rr_AnnualReturn2007rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.03310.0331falsefalsefalsetruefalseOtherxbrli: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_AnnualReturn2007truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.03310.0331falsefalsefalsetruefalseOthernanafalsefalse2falseRowprimaryElement*5false0rr_AnnualReturn2008rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.02100.0210falsefalsefalsetruefalseOtherxbrli: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_AnnualReturn2008truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.02100.0210falsefalsefalsetruefalseOthernanafalsefalse3falseRowprimaryElement*6false0rr_AnnualReturn2009rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.00540.0054falsefalsefalsetruefalseOtherxbrli: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_AnnualReturn2009truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.00540.0054falsefalsefalsetruefalseOthernanafalsefalse4falseRowprimaryElement*7false0rr_AnnualReturn2010rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1truetruefalse0.00020.0002falsefalsefalsetruefalseOtherxbrli: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_AnnualReturn2010truefalsefalsefalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.00020.0002falsefalsefalsetruefalseOthernanafalsefalse14Annual Total Returns (Bar Chart) - Sterling Capital National Tax-Free Money Market Fund (Class Institutional)
UnKnownUnKnownUnKnownUnKnownfalsetrueColumnperiodPeriod*Columndei_DocumentInformationDocumentAxisAxis*Columndei_LegalEntityAxisAxis*Columnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to BarChartData.No authoritative reference available.falsefalse23false0rr_BarChartClosingTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<p>Best quarter: 0.84% 9/30/07 </p>
<p>Worst quarter: 0% 9/30/10 </p>falsefalsefalsefalsefalseOtherus-types:textBlockItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: 1
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 4
-Paragraph 2
-Subparagraph ii
-Subsection b
falsefalse24false0rr_PerformanceTableTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<div> <div style="display:none;" >~ http://bbtfunds.com/role/AverageAnnualTotalReturnsSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutional row period compact * row primary compact * column dei_LegalEntityAxis compact bicax_S000012847_Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row rr_DocumentInformationDocumentAxis compact bicax_Prospectus_Two_Institutional_Class_Member ~</div> </div>falsefalse<div> <div style="display:none;" >~ http://bbtfunds.com/role/AverageAnnualTotalReturnsSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutional row period compact * row primary compact * column dei_LegalEntityAxis compact bicax_S000012847_Member column rr_ProspectusShareClassAxis compact * column rr_PerformanceMeasureAxis compact * row rr_DocumentInformationDocumentAxis compact bicax_Prospectus_Two_Institutional_Class_Member ~</div> </div>truehttp://bbtfunds.com/role/AverageAnnualTotalReturnsSterlingCapitalNationalTaxFreeMoneyMarketFundClassInstitutional2.2.0.25truefalse0200642 - Schedule - Average Annual Total Returns - Sterling Capital National Tax-Free Money Market Fund (Class Institutional) {Transposed}truefalsefalse1falsefalsetruefalse{dei_DocumentInformationDocumentAxis} : Sterling Capital National Tax-Free Money Market Fund
{dei_LegalEntityAxis} : Prospectus, Institutional Class
2/2/2010 - 2/1/2011
TwelveMonthsEnded_01Feb2011_S000012847_Member_Prospectus_Two_Institutional_Class_Memberhttp://www.sec.gov/CIK0000889284duration2010-02-02T00:00:002011-02-01T00:00:00falsefalseSterling Capital National Tax-Free Money Market Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldibicax_S000012847Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseProspectus, Institutional Classdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldibicax_ProspectusTwoInstitutionalClassMemberdei_LegalEntityAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli02falsefalseUSDtruefalse{dei_DocumentInformationDocumentAxis} : Sterling Capital National Tax-Free Money Market Fund
{dei_LegalEntityAxis} : Prospectus, Institutional Class
{rr_ProspectusShareClassAxis} : Class Institutional, Sterling Capital National Tax-Free Money Market Fund
2/2/2010 - 2/1/2011
USD ($)
$TwelveMonthsEnded_01Feb2011_S000012847_Member_Prospectus_Two_Institutional_Class_Member_C000034744_Memberhttp://www.sec.gov/CIK0000889284duration2010-02-02T00:00:002011-02-01T00:00:00falsefalseSterling Capital National Tax-Free Money Market Funddei_DocumentInformationDocumentAxisxbrldihttp://xbrl.org/2006/xbrldibicax_S000012847Memberdei_DocumentInformationDocumentAxisexplicitMemberfalsefalseProspectus, Institutional Classdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldibicax_ProspectusTwoInstitutionalClassMemberdei_LegalEntityAxisexplicitMemberfalsefalseClass Institutional, Sterling Capital National Tax-Free Money Market Fundrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldibicax_C000034744Memberrr_ProspectusShareClassAxisexplicitMemberPureStandardhttp://www.xbrl.org/2003/instancepurexbrli0USDStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$1false1false0natruenanaNo definition available.truefalsefalsefalsefalsefalsefalsefalsefalsefalsehttp://bbtfunds.com/role/averageannualtotalreturnssterlingcapitalnationaltaxfreemoneymarketfundclassinstitutional1falsefalsefalse00falsefalsefalsetruefalse2falsefalsefalse00falsefalsefalsetruefalseOthernaNo definition available.No authoritative reference available.falsefalse0natruenanaNo definition available.truefalsefalsefalsefalsefalsefalsefalsefalsefalsehttp://bbtfunds.com/role/averageannualtotalreturnssterlingcapitalnationaltaxfreemoneymarketfundclassinstitutional1falsefalsefalse00falsefalsefalsetruefalse2falsefalsefalse00falsefalsefalsetruefalseOthernaNo definition available.No authoritative reference available.falsefalse3true3true0rr_AverageAnnualReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruefalse00falsefalsefalsetruefalse2falsetruefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse0rr_AverageAnnualReturnAbstractrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruefalse00falsefalsefalsetruefalse2falsetruefalse00falsefalsefalsetruefalseOtherxbrli:stringItemTypestringNo definition available.falsefalse4false4false0rr_AverageAnnualReturnCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Average Annual Total Returns as of December 31, 2010falsefalsefalsetruefalse2falsetruefalse00falsefalsefalsetruefalseOtherxbrli: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
falsefalse0rr_AverageAnnualReturnCaptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00Average Annual Total Returns as of December 31, 2010Average Annual Total Returns as of December 31, 2010falsefalsefalsetruefalse2falsetruefalse00falsefalsefalsetruefalseOtherxbrli: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
falsefalse5false5false0rr_AverageAnnualReturnColumnNamerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsetruefalse2falsetruefalse00Institutional SharesfalsefalsefalsetruefalseOtherus-types:textBlockItemTypestringThis 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 1
-Subsection b
falsefalse0rr_AverageAnnualReturnColumnNamerrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsefalsetruefalse2falsetruefalse00Institutional SharesInstitutional SharesfalsefalsefalsetruefalseOtherus-types:textBlockItemTypestringThis 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 1
-Subsection b
falsefalse6false6false0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruetrue00falsefalsefalsetruefalse2truetruetrue0.00020.0002falsefalsefalsetruefalseOtherxbrli: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
falsefalse0rr_AverageAnnualReturnYear01rrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalseverboselabel1falsetruetrue00falsefalsefalsetruefalse2truetruetrue0.00020.0002falsefalsefalsetruefalseOtherxbrli: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
falsefalse7false7false0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00falsefalsefalsetruefalse2truetruetrue0.01650.0165falsefalsefalsetruefalseOtherxbrli: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
falsefalse0rr_AverageAnnualReturnSinceInceptionrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruetrue00falsefalsefalsetruefalse2truetruetrue0.01650.0165falsefalsefalsetruefalseOtherxbrli: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
falsefalse8false8false0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsetruetruefalse2falsetruefalse002006-08-01falsefalsetruetruefalseOtherxbrli: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
falsefalse0rr_AverageAnnualReturnInceptionDaterrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsetruefalse00falsefalsetruetruefalse2falsetruefalse002006-08-012006-08-01falsefalsetruetruefalseOtherxbrli: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
falsefalse27Average Annual Total Returns - Sterling Capital National Tax-Free Money Market Fund (Class Institutional)UnKnownUnKnownUnKnownUnKnowntruetrueColumnperiodPeriod*ColumnprimaryElement*Columnrr_DocumentInformationDocumentAxisAxisbicax_Prospectus_Two_Institutional_Class_MemberRowdei_LegalEntityAxisAxisbicax_S000012847_MemberRowrr_ProspectusShareClassAxisAxis*Rowrr_PerformanceMeasureAxisAxis*Rowdei_DocumentInformationDocumentAxisAxis*RowunitUnit*falsefalsefalseOtherus-types:textBlockItemTypestringContains a command for the SEC Viewer for the role corresponding to PerformanceTableData.No authoritative reference available.falsefalse25false0rr_PerformanceTableNarrativeTextBlockrrfalsenadurationNo definition available.falsefalsefalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00As of December 31, 2010, the Fund’s 7-day yield for Institutional Shares was 0.08%. For current yield information on the Fund, call 1-800-228-1872.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
falsefalse124Risk/Return Summary - Sterling Capital National Tax-Free Money Market Fund (Class Institutional) (Sterling Capital National Tax-Free Money Market Fund, Prospectus, Institutional Class)UnKnownUnKnownUnKnownUnKnownfalsetrue