XML 47 R114.htm IDEA: XBRL DOCUMENT v2.4.1.9
Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Lazard Emerging Markets Multi Asset Portfolio
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Portfolio seeks total return from current income and capital appreciation.

Expense [Heading] rr_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio.

Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination 2025-05-01
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Portfolio 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 Portfolio shares are held in a taxable account. These costs, which are not reflected in annual portfolio operating expenses or in the Example, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 122% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 122.00%rr_PortfolioTurnoverRate
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds.


The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then hold or 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 Portfolio’s operating expenses remain the same, giving effect to the fee waiver and expense reimbursement arrangement described above. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Investment Manager allocates the Portfolio’s assets among various emerging markets equity, debt and currency investment strategies managed by the Investment Manager in proportions consistent with the Investment Manager’s evaluation of various economic and other factors through quantitative and qualitative analysis. These proportions are changed from time to time without notice to shareholders, and at any given time the allocation to one strategy (other than currency investments) may comprise a substantial percentage of the Portfolio’s assets or, conversely, there may be no allocation to such strategy. The Investment Manager will make allocation decisions among the strategies based on quantitative and qualitative analysis using a number of different tools, including proprietary software models. Quantitative analysis includes statistical analysis of portfolio risks, factor dependencies and trading tendencies. Qualitative analysis includes analysis of the global economic environment as well as internal and external research on individual securities, portfolio holdings, attribution factors, behavioral patterns and overall market views and scenarios.


The Portfolio may invest in:


 

•

 

equity securities, including common stocks and depositary receipts and shares

 

•

 

debt securities issued or guaranteed by governments, government agencies or supranational bodies or companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds (“junk bonds”), convertible securities, commercial paper, collateralized debt obligations (“CDOs”), short- and medium-term obligations and other fixed-income obligations

 

•

 

emerging markets currencies and related instruments (primarily forward currency contracts) and structured notes


The securities in which the Portfolio invests may be denominated in the US dollar, the Canadian dollar, the Euro, the Japanese yen, the Pound Sterling, or the local currency of the issuer. Under normal circumstances, the Portfolio invests at least 80% of its assets in securities and other investments that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the MSCI World Index. The allocation of the Portfolio’s assets among countries and regions may vary from time to time based on the Investment Manager’s judgment and its analysis of market conditions.


The Portfolio may invest without limitation in securities rated below investment grade (e.g., lower than Baa by Moody’s Investors Service, Inc. (“Moody’s”) or lower than BBB by Standard & Poor’s Ratings Group (“S&P”)) (“junk bonds”) or securities that are unrated. Additionally, the Portfolio is not restricted to investments in debt securities of any particular maturity or duration. Duration is an estimate of the sensitivity of the price (the value of principal) of a fixed-income security to a change in interest rates. Generally, the longer the duration, the higher the expected volatility. For example, the market price of a fixed-income security with a duration of three years would be expected to decline 3% if interest rates rose 1%. Conversely, the market price of the same security would be expected to increase 3% if interest rates fell 1%.


The Portfolio’s currency strategy uses forward currency contracts, options on currencies and structured notes, although the Portfolio may not allocate assets to the currency strategy at all times, and there may be no allocation to currency investments for significant periods of time. The Portfolio also may, but is not required to, enter into forward foreign currency contracts, purchase options on currencies and enter into currency swaps to hedge the foreign currency exposure associated with equity or debt investment strategies. The Portfolio also may enter into credit default swaps and other types of swaps, for hedging purposes or to seek to increase returns.

Risk [Heading] rr_RiskHeading Principal Investment Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

The value of your investment in the Portfolio will fluctuate, which means you could lose money.


Allocation Risk. The Portfolio’s ability to achieve its investment objective depends in part on the Investment Manager’s skill in determining the Portfolio’s allocation among the investment strategies. The Investment Manager’s evaluations and assumptions underlying its allocation decisions may differ from actual market conditions.


Market Risk. Market risks, including political, regulatory, market and economic developments, and developments that impact specific economic sectors, industries or segments of the market, can affect the value of the Portfolio’s investments. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect the Portfolio.


Issuer Risk. The value of a security may decline for a number of reasons which directly relate to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods or services, as well as the historical and prospective earnings of the issuer and the value of its assets or factors unrelated to the issuer’s value, such as investor perception.


Non-US Securities Risk. The Portfolio’s performance will be influenced by political, social and economic factors affecting the non-US countries and companies in which the Portfolio invests. Non-US securities carry special risks, such as less developed or less efficient trading markets, political instability, a lack of company information, differing auditing and legal standards, and, potentially, less liquidity.


Emerging Market Risk. Emerging market countries can generally have economic structures that are less diverse and mature, and political systems that are less stable, than those of developed countries. The economies of countries with emerging markets may be based predominantly on only a few industries, may be highly vulnerable to changes in local or global trade conditions, and may suffer from extreme debt burdens or volatile inflation rates. The securities markets of emerging market countries have historically been extremely volatile. These market conditions may continue or worsen. Significant devaluation of emerging market currencies against the US dollar may occur subsequent to acquisition of investments denominated in emerging market currencies.


Foreign Currency Risk. Investments denominated in currencies other than US dollars may experience a decline in value, in US dollar terms, due solely to fluctuations in currency exchange rates. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.


Value Investing and Growth Investing Risks. The Portfolio may invest a portion of its assets in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The Portfolio also may invest a portion of its assets in stocks believed by the Investment Manager to have the potential for growth, but that may not realize such perceived potential for extended periods of time or may never realize such perceived growth potential. Such stocks may be more volatile than other stocks because they can be more sensitive to investor perceptions of the issuing company’s growth potential. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.


Quantitative Model Risk. The success of the Portfolio depends upon effectiveness of the Investment Manager’s quantitative model. A quantitative model, such as the risk and other models used by the Investment Manager requires adherence to a systematic, disciplined process. The Investment Manager’s ability to monitor and, if necessary, adjust its quantitative model could be adversely affected by various factors, including incorrect or outdated market and other data inputs. Factors that affect a security’s value can change over time, and these changes may not be reflected in the quantitative model. In addition, the factors used in quantitative analysis and the weight placed on those factors may not be predictive of a security’s value.


Small and Mid Cap Companies Risk. Small and mid cap companies carry additional risks because their earnings tend to be less predictable, their share prices more volatile and their securities less liquid than larger, more established companies. The shares of small and mid cap companies tend to trade less frequently than those of larger companies, which can have an adverse effect on the pricing of these securities and on the ability to sell these securities when the Investment Manager deems it appropriate.


Fixed-Income and Debt Securities Risk. The market value of a debt security may decline due to general market conditions that are not specifically related to a particular company, such as real or perceived adverse economic conditions, changes in the outlook for corporate earnings, changes in interest or currency rates or adverse investor sentiment generally. The debt securities market can be susceptible to increases in volatility and decreases in liquidity. Prices of bonds and other debt securities tend to move inversely with changes in interest rates. Increases in volatility and decreases in liquidity may be caused by a rise in interest rates (or the expectation of a rise in interest rates). Interest rate risk is usually greater for fixed-income securities with longer maturities or durations.


The Portfolio’s investments in lower-rated, higher-yielding securities (“junk bonds”) are subject to greater credit risk than its higher rated investments. Credit risk is the risk that the issuer will not make interest or principal payments, or will not make payments on a timely basis. Non-investment grade securities tend to be more volatile, less liquid and are considered speculative. If there is a decline, or perceived decline, in the credit quality of a debt security (or any guarantor of payment on such security), the security’s value could fall, potentially lowering the Portfolio’s share price. The prices of non-investment grade securities, unlike investment grade debt securities, may fluctuate unpredictably and not necessarily inversely with changes in interest rates. The market for these securities may be less liquid and therefore these securities may be harder to value or sell at an acceptable price, especially during times of market volatility or decline. Liquidity can decline unpredictably in response to overall economic conditions or credit tightening.


Some debt securities may give the issuer the option to call, or redeem, the securities before their maturity, and, during a time of declining interest rates, the Portfolio may have to reinvest the proceeds in an investment offering a lower yield (and the Portfolio may not benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).


Structured notes are privately negotiated debt instruments where the principal and/or interest is determined by reference to a specified asset, market or rate, or the differential performance of two assets or markets. Structured notes can have risks of both debt securities and derivatives transactions.


Liquidity Risk. The lack of a readily available market may limit the ability of the Portfolio to sell certain securities at the time and price it would like. The size of certain securities offerings of emerging markets issuers may be relatively smaller in size than offerings in more developed markets and, in some cases, the Portfolio, by itself or together with other Portfolios or other accounts managed by the Investment Manager, may hold a position in a security that is large relative to the typical trading volume for that security; these factors can make it difficult for the Portfolio to dispose of the position at the desired time or price.


Forward Currency Contracts and Other Derivatives Risk. Forward currency contracts and other derivatives transactions, including those entered into for hedging purposes, may reduce returns or increase volatility, perhaps substantially. Forward currency contracts, over-the-counter options on currencies, structured notes, swap agreements and other over-the-counter derivatives transactions are subject to the risk of default by the counterparty and can be illiquid. These derivatives transactions, as well as the exchange-traded options in which the Portfolio may invest, are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related currency, security or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions, even if entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.


High Portfolio Turnover Risk. The Portfolio’s investment strategy may involve high portfolio turnover (such as 100% or more). A portfolio turnover rate of 100%, for example, is equivalent to the Portfolio buying and selling all of its securities once during the course of the year. A high portfolio turnover rate could result in high transaction costs and an increase in taxable capital gains distributions to the Portfolio’s shareholders, which will reduce returns to shareholders.

Risk Lose Money [Text] rr_RiskLoseMoney The value of your investment in the Portfolio will fluctuate, which means you could lose money.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Multi Asset Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to that of a broad measure of market performance. The bar chart shows how the performance of the Portfolio’s Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Multi Asset Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to that of a broad measure of market performance.
Performance Availability Phone [Text] rr_PerformanceAvailabilityPhone (800) 823-6300
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.LazardNet.com
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

 

 

 

 

Best Quarter:
3/31/12  12.14%
 
Worst Quarter:
6/30/13  -7.19%

 

Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2012
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 12.14%rr_BarChartHighestQuarterlyReturn
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Jun. 30, 2013
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (7.19%)rr_BarChartLowestQuarterlyReturn
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (for the periods ended December 31, 2014)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate After-tax returns are calculated using the historical highest individual marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred The after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns are shown only for Institutional Shares. After-tax returns of the Portfolio’s other share classes will vary.
Performance Table Narrative rr_PerformanceTableNarrativeTextBlock

After-tax returns are shown only for Institutional Shares. After-tax returns of the Portfolio’s other share classes will vary. After-tax returns are calculated using the historical highest individual marginal income tax rates and do not reflect the impact of state and local taxes. Actual after-tax returns depend on the investor’s tax situation and may differ from those shown. The after-tax returns shown are not relevant to investors who hold their shares through tax-deferred arrangements such as 401(k) plans or individual retirement accounts. Returns shown below for the Portfolio’s R6 Shares (which were not operational as of December 31, 2014) reflect the performance of the Portfolio’s Institutional Shares. R6 Shares would have had substantially similar returns as Institutional Shares because the share classes are invested in the same portfolio of securities, and the returns would differ only to the extent that the classes do not have the same expenses.

MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (2.19%)rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_PerformanceMeasureAxis
= cik0000874964_index_MSCI_Emerging_Markets_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember
Life of Portfolio rr_AverageAnnualReturnSinceInception (2.76%)rr_AverageAnnualReturnSinceInception
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_PerformanceMeasureAxis
= cik0000874964_index_MSCI_Emerging_Markets_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember
Institutional Shares
  
Risk/Return: rr_RiskReturnAbstract  
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (1.00%)rr_RedemptionFeeOverRedemption
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Management Fees rr_ManagementFeesOverAssets 1.00%rr_ManagementFeesOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.28%rr_OtherExpensesOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 1.28%rr_ExpensesOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets    [1]
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 1.28%rr_NetExpensesOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member		 [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 130rr_ExpenseExampleYear01
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 406rr_ExpenseExampleYear03
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 702rr_ExpenseExampleYear05
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,545rr_ExpenseExampleYear10
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Annual Return 2012 rr_AnnualReturn2012 14.02%rr_AnnualReturn2012
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Annual Return 2013 rr_AnnualReturn2013 (2.41%)rr_AnnualReturn2013
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Annual Return 2014 rr_AnnualReturn2014 (5.57%)rr_AnnualReturn2014
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
1 Year rr_AverageAnnualReturnYear01 (5.57%)rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Life of Portfolio rr_AverageAnnualReturnSinceInception (2.60%)rr_AverageAnnualReturnSinceInception
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 2011
Institutional Shares | After Taxes on Distributions
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (6.01%)rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_PerformanceMeasureAxis
= rr_AfterTaxesOnDistributionsMember
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Life of Portfolio rr_AverageAnnualReturnSinceInception (2.89%)rr_AverageAnnualReturnSinceInception
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_PerformanceMeasureAxis
= rr_AfterTaxesOnDistributionsMember
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Institutional Shares | After Taxes on Distributions and Sale of Portfolio Shares
  
Risk/Return: rr_RiskReturnAbstract  
1 Year rr_AverageAnnualReturnYear01 (2.78%)rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_PerformanceMeasureAxis
= rr_AfterTaxesOnDistributionsAndSalesMember
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Life of Portfolio rr_AverageAnnualReturnSinceInception (1.92%)rr_AverageAnnualReturnSinceInception
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_PerformanceMeasureAxis
= rr_AfterTaxesOnDistributionsAndSalesMember
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098749Member
Open Shares
  
Risk/Return: rr_RiskReturnAbstract  
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (1.00%)rr_RedemptionFeeOverRedemption
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098748Member
Management Fees rr_ManagementFeesOverAssets 1.00%rr_ManagementFeesOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098748Member
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%rr_DistributionAndService12b1FeesOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098748Member
Other Expenses rr_OtherExpensesOverAssets 0.98%rr_OtherExpensesOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098748Member
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 2.23%rr_ExpensesOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098748Member
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.63%)rr_FeeWaiverOrReimbursementOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098748Member		 [1]
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 1.60%rr_NetExpensesOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098748Member		 [1]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 163rr_ExpenseExampleYear01
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098748Member
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 505rr_ExpenseExampleYear03
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098748Member
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 871rr_ExpenseExampleYear05
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098748Member
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,900rr_ExpenseExampleYear10
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098748Member
1 Year rr_AverageAnnualReturnYear01 (5.89%)rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098748Member
Life of Portfolio rr_AverageAnnualReturnSinceInception (2.91%)rr_AverageAnnualReturnSinceInception
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000098748Member
Inception Date rr_AverageAnnualReturnInceptionDate Mar. 31, 2011
R6 Shares
  
Risk/Return: rr_RiskReturnAbstract  
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (1.00%)rr_RedemptionFeeOverRedemption
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000134200Member
Management Fees rr_ManagementFeesOverAssets 1.00%rr_ManagementFeesOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000134200Member
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.28%rr_OtherExpensesOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000134200Member		 [2]
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 1.28%rr_ExpensesOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000134200Member
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.03%)rr_FeeWaiverOrReimbursementOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000134200Member		 [1]
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 1.25%rr_NetExpensesOverAssets
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000134200Member		 [1]
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates “Other Expenses” are based on estimated amounts for the current fiscal year, using “Other Expenses” for Institutional Shares from the last fiscal year.
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 127rr_ExpenseExampleYear01
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000134200Member
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 397rr_ExpenseExampleYear03
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000134200Member
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 686rr_ExpenseExampleYear05
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000134200Member
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,511rr_ExpenseExampleYear10
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000134200Member
1 Year rr_AverageAnnualReturnYear01 (5.57%)rr_AverageAnnualReturnYear01
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000134200Member
Life of Portfolio rr_AverageAnnualReturnSinceInception (2.60%)rr_AverageAnnualReturnSinceInception
/ dei_LegalEntityAxis
= cik0000874964_S000031729Member
/ rr_ProspectusShareClassAxis
= cik0000874964_C000134200Member
[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through May 1, 2025, to the extent Total Annual Portfolio Operating Expenses exceed 1.30%, 1.60% and 1.25% of the average daily net assets of the Portfolio's Institutional Shares, Open Shares and R6 Shares, respectively, exclusive of taxes, brokerage, interest on borrowings, fees and expenses of "Acquired Funds" and extraordinary expenses, and excluding shareholder redemption fees or other transaction fees. This agreement can only be amended by agreement of the Fund, upon approval by the Board, and the Investment Manager to lower the net amount shown and will terminate automatically in the event of termination of the Investment Management Agreement between the Investment Manager and the Fund, on behalf of the Portfolio.
[2] "Other Expenses" are based on estimated amounts for the current fiscal year, using "Other Expenses" for Institutional Shares from the last fiscal year.