0000930413-13-003745.txt : 20130710 0000930413-13-003745.hdr.sgml : 20130710 20130710152207 ACCESSION NUMBER: 0000930413-13-003745 CONFORMED SUBMISSION TYPE: 485BPOS PUBLIC DOCUMENT COUNT: 6 FILED AS OF DATE: 20130710 DATE AS OF CHANGE: 20130710 EFFECTIVENESS DATE: 20130710 FILER: COMPANY DATA: COMPANY CONFORMED NAME: LAZARD FUNDS INC CENTRAL INDEX KEY: 0000874964 IRS NUMBER: 000000000 STATE OF INCORPORATION: MD FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 485BPOS SEC ACT: 1933 Act SEC FILE NUMBER: 033-40682 FILM NUMBER: 13961813 BUSINESS ADDRESS: STREET 1: 30 ROCKEFELLER PLAZA CITY: NEW YORK STATE: NY ZIP: 10112 BUSINESS PHONE: 2126326000 MAIL ADDRESS: STREET 1: 30 ROCKEFELLER PLAZA CITY: NEW YORK STATE: NY ZIP: 10112 FILER: COMPANY DATA: COMPANY CONFORMED NAME: LAZARD FUNDS INC CENTRAL INDEX KEY: 0000874964 IRS NUMBER: 000000000 STATE OF INCORPORATION: MD FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 485BPOS SEC ACT: 1940 Act SEC FILE NUMBER: 811-06312 FILM NUMBER: 13961814 BUSINESS ADDRESS: STREET 1: 30 ROCKEFELLER PLAZA CITY: NEW YORK STATE: NY ZIP: 10112 BUSINESS PHONE: 2126326000 MAIL ADDRESS: STREET 1: 30 ROCKEFELLER PLAZA CITY: NEW YORK STATE: NY ZIP: 10112

0000874964 S000010265 Lazard US Corporate Income Portfolio

C000028362 Open Shares LZHOX

C000028363 Institutional Shares LZHYX

0000874964 S000031124 Lazard US Short Duration Fixed Income Portfolio

C000096533 Institutional Shares UMNIX

C000096534 Open Shares UMNOX

0000874964 S000041253 Lazard Explorer Total Return Portfolio

C000127908 Institutional Shares LETIX

C000127909 Open Shares LETOX

485BPOS 1 c73363_485bpos.htm

Securities Act File No. 33-40682
Investment Company Act File No. 811-06312

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933		/X/
	Post-Effective Amendment No. 75	/X/
	and
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940		/X/
	Amendment No. 75	/X/

(Check appropriate box or boxes)

THE LAZARD FUNDS, INC.

(Exact Name of Registrant as Specified in Charter)

(212) 632-6000

(Registrant's Telephone Number, including Area Code)

30 Rockefeller Plaza, New York, New York 10112

(Address of Principal Executive: Number, Street, City, State, Zip Code)

Nathan A. Paul, Esq.
30 Rockefeller Plaza
New York, New York 10112
(Name and Address of Agent for Services)

Copy to:
Janna Manes, Esq.
Stroock & Stroock & Lavan LLP
180 Maiden Lane
New York, New York 10038-4982

It is proposed that this filing will become effective (check appropriate box)

X	immediately upon filing pursuant to paragraph (b)
	on (DATE) pursuant to paragraph (b)
	60 days after filing pursuant to paragraph (a)(1)
	on (DATE) pursuant to paragraph (a)(1)
	75 days after filing pursuant to paragraph (a)(2)
	on (DATE) pursuant to paragraph (a)(2) of Rule 485.
If appropriate, check the following box:
	this post-effective amendment designates a new effective date for a previously filed post-effective amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for effectiveness of this Amendment to the Registration Statement under Rule 485(b) of the Securities Act of 1933 and has duly caused this Amendment to the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York, and State of New York, on the 9th day of July, 2013.

THE LAZARD FUNDS, INC.

By: /s/ Charles L. Carroll

Charles L. Carroll, Chief Executive Officer

Pursuant to the requirements of the Securities Act of 1933, this Amendment to Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.

/s/ Charles L. Carroll Charles L. Carroll	President and Director	July 10, 2013

/s/ Stephen St. Clair Stephen St. Clair	Treasurer and Chief Financial Officer	July 10, 2013

/s/ Ashish Bhutani Ashish Bhutani	Director	July 10, 2013

/s/ Kenneth S. Davidson* Kenneth S. Davidson	Director	July 10, 2013

/s/ Nancy A. Eckl* Nancy A. Eckl	Director	July 10, 2013

/s/ Lester Z. Lieberman* Lester Z. Lieberman	Director	July 10, 2013

/s/ Leon M. Pollack* Leon M. Pollack	Director	July 10, 2013

/s/ Richard Reiss, Jr.* Richard Reiss, Jr.	Director	July 10, 2013

/s/ Robert M. Solmson* Robert M. Solmson	Director	July 10, 2013

*By: /s/ Nathan A. Paul Attorney-in-fact, Nathan A. Paul

EXHIBIT INDEX

Exhibit No.	Description
EX-101.INS	XBRL Instance Document
EX-101.SCH	XBRL Taxonomy Extension Schema Document
EX-101.DEF	XBRL Taxonomy Extension Definition Linkbase
EX-101.LAB	XBRL Taxonomy Extension Labels Linkbase
EX-101.PRE	XBRL Taxonomy Extension Presentation Linkbase

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Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through June 28, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .40% and .70% of the average daily net assets of the Portfolio's Institutional Shares and Open 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 Fund's Board of Directors (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. Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through June 28, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .55% and .85% of the average daily net assets of the Portfolio's Institutional Shares and Open 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. LAZARD FUNDS INC 485BPOS false 0000874964 2012-12-31 2013-06-25 2013-06-28 2013-06-28 Lazard Explorer Total Return Portfolio Fees and Expenses This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio, a series of The Lazard Funds, Inc. (the “Fund”). -0.0100 -0.0100 0.0100 0.0100 0.0000 0.0025 0.0030 0.0035 0.0130 0.0160 ~ http://lazardnet.com/20130625/role/ScheduleShareholderFees20001 column dei_LegalEntityAxis compact cik0000874964_S000041253Member row primary compact * ~ ~ http://lazardnet.com/20130625/role/ScheduleAnnualFundOperatingExpenses20002 column dei_LegalEntityAxis compact cik0000874964_S000041253Member row primary compact * ~ Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) "Other Expenses" are based on estimated amounts for the current fiscal year. Shareholder Transaction Fees (fees paid directly from your investment) Investment Objective The Portfolio seeks total return from current income and capital appreciation. Principal Investment Strategies The Portfolio utilizes a flexible total return investment strategy. It typically invests primarily in debt securities issued or guaranteed by governments, government agencies or supranational bodies, forward contracts, including non-deliverable forward contracts, credit default swap agreements (on an index or basket of securities or a single security), interest rate swap agreements and foreign currency options, debt securities issued by companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds; short- and medium-term obligations and other fixed-income obligations. The Portfolio may also invest in certain other types of securities, such as convertible securities, commercial paper, and collateralized debt obligations. At certain times, based on the currently existing market environment, Lazard Asset Management LLC (the “Investment Manager”) may not believe it is able to find sufficient opportunities to invest in these types of securities and may determine to tactically shift the Portfolio to invest substantially in money market instruments, such as short-term US Treasury securities and certificates of deposit. The securities in which the Portfolio invests may be denominated in any currency. The Portfolio typically focuses its investments in securities of that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the Morgan Stanley Capital International (“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 is not limited to securities of any particular quality or investment grade and, as a result, the Portfolio may invest significantly in securities rated below investment grade (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 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 Investment Manager expects to actively increase and decrease the Portfolio’s exposures to emerging market securities and currencies, and to significantly utilize derivatives. The Portfolio expects to utilize the following types of derivatives: forward contracts (including non-deliverable forward contracts, which settle in cash based on the difference between the agreed upon contract price or rate and the prevailing spot price or rate on an agreed notional amount), credit default swap agreements (including credit default swap agreements on an index or basket of securities or a single security), interest rate swap agreements and foreign currency options. Derivative positions may represent a substantial investment exposure through the economic leverage embedded in these positions. Although the Portfolio does not have a history of operations, based on the portfolios of other clients of the Investment Manager managed in a strategy similar to that to be employed for the Portfolio, the aggregate notional amount of derivative positions may typically be expected to range from 20% to 70% of the Portfolio’s assets. The Investment Manager may change the Portfolio’s investment exposures frequently, and positions may be held for only a short period of time as the Investment Manager seeks to add value in different market environments in pursuit of the Portfolio’s total return objective. However, there is no guarantee that the Portfolio will achieve its investment objective, and an investment in the Portfolio involves a high degree of risk. The Portfolio is classified as “non-diversified” under the Investment Company Act of 1940, as amended (the “1940 Act”), which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund. Performance Bar Chart and Table Because the Portfolio has not commenced investment operations prior to the date of this Prospectus, no performance returns are presented. Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year. Comparison of Portfolio performance to an appropriate index indicates how the Portfolio’s average annual returns compare with those of a broad measure of market performance. After the Portfolio commences investment operations, performance information will be available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance is not necessarily an indication of how the Portfolio will perform in the future. Because the Portfolio has not commenced investment operations prior to the date of this Prospectus, no performance returns are presented. Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year. The Portfolio's past performance is not necessarily an indication of how the Portfolio will perform in the future. (800) 823-6300 www.LazardNet.com Principal Investment Risks The value of your investment in the Portfolio will fluctuate, which means you could lose money. Fixed-Income and Debt Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes 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 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. Some debt securities may give the issuer the option to call, or redeem, the securities before their maturity. If securities held by the Portfolio are called during a time of declining interest rates (which is typically the case when issuers exercise options to call outstanding securities), the Portfolio may have to reinvest the proceeds in an investment offering a lower yield (and the Portfolio may not fully benefit from any increase in the value of its portfolio holdings as a result of declining interest rates). 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. 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 exposure to less developed or less efficient trading markets, political instability, a lack of company information, differing auditing and legal standards, and, potentially, less liquidity. In addition, investments denominated in currencies other than US dollars carry the risk that such currencies will decline in value relative to the US dollar and affect the value of these investments held in the Portfolio. 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 securities markets of emerging market countries have historically been extremely volatile. However, the capital markets in the US and internationally have experienced unprecedented volatility in recent years, causing significant declines in the value and liquidity of many securities. 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. Derivatives Risk. Derivatives transactions, including those entered into for hedging purposes, may reduce returns or increase volatility, perhaps substantially. Forward currency contracts, swap agreements and over-the-counter options on securities (including options on ETFs) and currencies are subject to the risk of default by the counterparty and can be illiquid. Changes in liquidity may result in significant, rapid and unpredictable changes in the prices for derivatives. 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, interest rate or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Successful use of derivatives is subject to the Investment Manager’s ability to predict correctly movements in the direction of the relevant reference asset or market. Use of derivatives transactions may cause the Portfolio to experience significant losses. 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 debt securities offerings of emerging markets issuers may be relatively smaller in size than debt 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. Non-Diversification Risk. Because the Portfolio may invest in a smaller number of issuers than other, more diversified investment portfolios, the Portfolio’s net asset value (“NAV”) may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers. 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 brokerage costs and an increase in taxable capital gains distributions to the Portfolio’s shareholders. Because the Portfolio may invest in a smaller number of issuers than other, more diversified investment portfolios, the Portfolio's net asset value ("NAV") may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio's investments consisted of securities issued by a larger number of issuers. The value of your investment in the Portfolio will fluctuate, which means you could lose money. Portfolio Turnover 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. Because the Portfolio had not commenced investment operations prior to the date of this Prospectus, no portfolio turnover information is presented. Example 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 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. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 132 412 163 505 ~ http://lazardnet.com/20130625/role/ScheduleExpenseExampleTransposed20003 column dei_LegalEntityAxis compact cik0000874964_S000041253Member row primary compact * ~ Lazard US Short Duration Fixed Income Portfolio Fees and Expenses This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. 0.0025 0.0025 0.0000 0.0025 0.0116 0.3761 0.0141 0.3811 -0.0101 -0.3741 0.0040 0.0070 ~ http://lazardnet.com/20130625/role/ScheduleAnnualFundOperatingExpenses20006 column dei_LegalEntityAxis compact cik0000874964_S000031124Member row primary compact * ~ 2014-06-28 Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) Investment Objective The Portfolio seeks total return and preservation of capital. Performance Bar Chart and Table Total Returns for Institutional Shares As of 12/31 The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Short Duration Fixed Income Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to those of a broad measure of market performance. The bar chart shows the performance of the Portfolio’s Institutional Shares. 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. 0.0254 ~ http://lazardnet.com/20130625/role/ScheduleAnnualTotalReturnsBarChart20008 column dei_LegalEntityAxis compact cik0000874964_S000031124Member column rr_ProspectusShareClassAxis compact cik0000874964_C000096533Member row primary compact * ~ Best Quarter: 0.0122 2012-06-30 Worst Quarter: -0.0002 2012-12-31 <table cellspacing="0" style="width: 100%; margin-left: 0%; margin-right: 0%;"> <tr valign="top"> <td> </td> <td> Best Quarter: 6/30/12 1.22% Worst Quarter: 12/31/12 -0.02% </td> </tr> </table> Average Annual Total Returns (for the periods ended December 31, 2012) After-tax returns for the Open Shares vary from those of Institutional Shares. 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. As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch 1-3 Year Treasury® Index to reflect its change from a municipal fund to its current investment strategy as of such date. 0.0254 0.0381 0.0193 0.0310 0.0166 0.0286 0.0224 0.0349 0.0043 0.0107 0.0298 0.0492 2011-02-28 2011-02-28 ~ http://lazardnet.com/20130625/role/ScheduleAverageAnnualReturnsTransposed20009 column dei_LegalEntityAxis compact cik0000874964_S000031124Member column rr_PerformanceMeasureAxis compact * row primary compact * ~ 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. The Portfolio's past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future. www.LazardNet.com 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. The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Short Duration Fixed Income Portfolio by showing the Portfolio's performance for the first complete calendar year of operation compared to those of a broad measure of market performance. (reflects no deduction for fees, expenses or taxes) As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch 1-3 Year Treasury Index to reflect its change from a municipal fund to its current investment strategy as of such date. (800) 823-6300 Principal Investment Strategies Under normal circumstances, the Portfolio invests at least 80% of its assets in fixed-income securities of US issuers, including US government securities, corporate securities, mortgage-related and asset-backed securities, convertible securities, municipal securities, structured products, preferred stocks and inflation- indexed-securities. These securities may have any type of interest rate payment terms, including fixed rate, adjustable rate or zero coupon features. Under normal circumstances, the Portfolio’s investment portfolio can be expected to have an average effective duration of three years or less. 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 invests primarily in securities that are rated investment grade by one or more nationally recognized statistical rating organizations (or, if unrated, determined by the Investment Manager to be of comparable quality). Securities are evaluated based on their fundamental and structural characteristics. Valuation analysis is tailored to the specific asset class, but may include credit research and analysis of features such as prepayment or call options, maturity, duration and coupon. Principal Investment Risks The value of your investment in the Portfolio will fluctuate, which means you could lose money. 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. Fixed-Income Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes in interest rates (i.e., as interest rates go up, prices go down). Interest rate risk is usually greater for fixed-income securities with longer maturities or effective durations. Other risk factors could have an effect on the Portfolio’s performance, including: <table style="MARGIN-LEFT: 0pc; FONT-SIZE: 0.2mm" cellspacing="0" cellpadding="0"> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr> <td> </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> if an issuer fails to make timely interest or principal payments (known as credit risk) </td> </tr> <tr> <td> </td> </tr> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> if there is a decline, or a perceived decline, in the credit quality of a fixed income security (or any guarantor of payment on such security) the security’s value could fall, potentially lowering the Portfolio’s share price </td> </tr> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> during unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like </td> </tr> </table> Adjustable rate securities provide the Portfolio with a certain degree of protection against rises in interest rates, although the Portfolio will participate in any declines in interest rates as well. Certain adjustable rate securities, such as those with interest rates that fluctuate directly or indirectly based on multiples of a stated index, are designed to be highly sensitive to changes in interest rates and can subject the holders thereof to extreme reductions of yield and possibly loss of principal. Certain fixed-income securities may be issued at a discount from their face value (such as zero coupon securities) or purchased at a price less than their stated face amount or at a price less than their issue price plus the portion of “original issue discount” previously accrued thereon, i.e., purchased at a “market discount.” The amount of original issue discount and/or market discount on certain obligations may be significant, and accretion of market discount together with original issue discount will cause the Portfolio to realize income prior to the receipt of cash payments with respect to these securities. Mortgage-Related and Asset-Backed Securities Risk. Mortgage-related securities are complex instruments, subject to both credit and prepayment risk, and may be more volatile and less liquid, and more difficult to price accurately, than more traditional debt securities. Although payments relating to certain mortgage-related securities are guaranteed by a third party (such as a US Government agency or instrumentality with respect to government-related mortgage-backed securities) or otherwise similarly secured, the market value of the security, which may fluctuate, is not secured. Mortgage-related securities generally are subject to credit risks associated with the performance of the underlying mortgage properties. Prepayment risk can lead to fluctuations in value of the mortgage-related security which may be pronounced. As with other interest-bearing securities, the prices of certain mortgage-related securities are inversely affected by changes in interest rates. However, although the value of a mortgage-related security may decline when interest rates rise, the converse is not necessarily true, since during periods of declining interest rates the mortgages underlying the security are more likely to be prepaid. The risks of asset-backed securities are similar to those of mortgage-related securities. However, asset-backed securities present certain risks that are not presented by mortgage-related securities. Primarily, these securities may provide the Portfolio with a less effective security interest in the related collateral than do mortgage-related securities. Structured Products Risk. Structured notes and other structured products 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 products can have risks of both fixed-income securities and derivatives transactions. Derivatives transactions may reduce returns or increase volatility, perhaps substantially, and they are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related reference assets, markets or rates. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions. The value of your investment in the Portfolio will fluctuate, which means you could lose money. Portfolio Turnover 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 77% of the average value of its portfolio. 0.77 Example 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 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 in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be: 41 347 675 1603 72 5607 8084 9821 ~ http://lazardnet.com/20130625/role/ScheduleExpenseExampleTransposed20007 column dei_LegalEntityAxis compact cik0000874964_S000031124Member row primary compact * ~ Lazard US Corporate Income Portfolio Fees and Expenses This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. -0.0100 -0.0100 0.0055 0.0055 0.0000 0.0025 0.0016 0.0044 0.0071 0.0124 -0.0016 -0.0039 0.0055 0.0085 ~ http://lazardnet.com/20130625/role/ScheduleShareholderFees20012 column dei_LegalEntityAxis compact cik0000874964_S000010265Member row primary compact * ~ ~ http://lazardnet.com/20130625/role/ScheduleAnnualFundOperatingExpenses20013 column dei_LegalEntityAxis compact cik0000874964_S000010265Member row primary compact * ~ 2014-06-28 Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) Shareholder Transaction Fees (fees paid directly from your investment) Investment Objective The Portfolio seeks maximum total return from a combination of capital appreciation and current income. Principal Investment Strategies Under normal circumstances, the Portfolio invests at least 80% of its assets in fixed-income securities issued by corporations or other non-governmental issuers similar to corporations, which securities are tied economically to the US. The Portfolio typically will invest a substantial portion of its assets, and may invest up to 100% of its assets, in securities rated, at the time of purchase, below investment grade by S&P or Moody’s and as low as C or Ca by S&P or Moody’s, respectively, or the unrated equivalent as determined by the Investment Manager (“junk bonds”); however, the Portfolio focuses such investments in below investment grade securities that may be considered “better quality” (i.e., rated B1 or higher by Moody’s, B+ or higher by S&P or the unrated equivalent as determined by the Investment Manager). The Portfolio may invest in dollar-denominated securities of non-US companies, including, to a limited extent, in emerging market companies. Although the Portfolio may invest in fixed-income securities without regard to their maturity, the Portfolio’s average weighted maturity is expected to range between two and ten years. Securities are evaluated based on their fundamental and structural characteristics. Valuation analysis is tailored to the specific asset class, but may include credit research, prepayment or call options, maturity, duration, coupon, currency and country risks. The Portfolio is constructed using a bottom-up discipline in which the Investment Manager follows a systematic process to seek out undervalued opportunities within each sector. Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31 The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Corporate Income 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 over the past 10 calendar years. 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. 0.2458 0.0988 0.0433 0.0971 0.0363 -0.2024 0.3466 0.1178 0.0517 0.1202 ~ http://lazardnet.com/20130625/role/ScheduleAnnualTotalReturnsBarChart20015 column dei_LegalEntityAxis compact cik0000874964_S000010265Member column rr_ProspectusShareClassAxis compact cik0000874964_C000028363Member row primary compact * ~ Best Quarter: 0.1308 2009-06-30 Worst Quarter: -0.1596 2008-12-31 <table cellspacing="0" style="width: 100%; margin-left: 0%; margin-right: 0%;"> <tr valign="top"> <td> </td> <td> Best Quarter: 6/30/09 13.08% Worst Quarter: 12/31/08 -15.96% </td> </tr> </table> Average Annual Total Returns (for the periods ended December 31, 2012) After-tax returns for the Open Shares vary from those of Institutional Shares. 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. As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch BB-B US Cash Pay Non-Distressed High Yield® Index instead of the Bank of America Merrill Lynch High Yield Master II® Index, to reflect the Portfolio’s focus on higher-yielding securities that may be considered “better quality.” 0.1202 0.0718 0.0867 0.0426 0.0945 0.0442 0.0579 0.0091 0.0774 0.0444 0.0573 0.0141 0.1189 0.0691 0.0839 0.0369 0.1427 0.0778 0.0847 0.0684 0.1427 0.0778 0.0847 0.0677 0.1558 0.1001 0.1039 0.0700 0.1558 0.1001 0.1039 0.0691 1998-01-02 1998-02-24 ~ http://lazardnet.com/20130625/role/ScheduleAverageAnnualReturnsTransposed20016 column dei_LegalEntityAxis compact cik0000874964_S000010265Member column rr_PerformanceMeasureAxis compact * row primary compact * ~ 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. The Portfolio's past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future. www.LazardNet.com 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. The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Corporate Income 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. (reflects no deduction for fees, expenses or taxes) As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch BB-B US Cash Pay Non-Distressed High Yield Index instead of the Bank of America Merrill Lynch High Yield Master II Index, to reflect the Portfolio's focus on higher-yielding securities that may be considered "better quality." (800) 823-6300 Principal Investment Risks The value of your investment in the Portfolio will fluctuate, which means you could lose money. 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. Fixed-Income Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes in interest rates. Interest rate risk, the risk that securities will decline in value because of changes in market interest rates, is usually greater for fixed-income securities with longer maturities or effective durations. The Portfolio’s investments in lower-rated, higher-yielding bonds are subject to greater credit risk than its higher-rated investments. Junk bonds tend to be more volatile, less liquid and are considered speculative. Other risk factors could have an effect on the Portfolio’s performance, including: <table style="MARGIN-LEFT: 0pc; FONT-SIZE: 0.2mm" cellspacing="0" cellpadding="0"> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> if an issuer fails to make timely interest or principal payments </td> </tr> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> if there is a decline, or a perceived decline, in the credit quality of a fixed-income security (or any guarantor of payment on such security) the security’s value could fall, potentially lowering the Portfolio’s share price </td> </tr> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> during unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like </td> </tr> </table> Non-US Company Securities Risk. The Portfolio’s performance will be influenced by political, social and economic factors affecting the non-US companies in which the Portfolio invests. Investments in securities of non-US companies carry special country-related risks, such as political instability, a lack of company information, differing auditing and legal standards, and, potentially, less liquidity. 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 value of your investment in the Portfolio will fluctuate, which means you could lose money. Portfolio Turnover 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 26% of the average value of its portfolio. 0.26 Example 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 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 in year one only. 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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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 1 -Subparagraph d false0Expense [Heading]6false 4rr_ExpenseNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio, a series of The Lazard Funds, Inc. (the “Fund”). falsefalsefalsenonnum:textBlockItemTypenaThis 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 1 -Subparagraph b false0Expense Narrative [Text Block]7false 4rr_ShareholderFeesCaptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Shareholder Transaction Fees (fees paid directly from your investment)falsefalsefalsexbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 false0Shareholder Fees Caption [Text]8false 4rr_OperatingExpensesCaptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsexbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 7 false0Operating Expenses Caption [Text]9false 4rr_PortfolioTurnoverHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Portfolio Turnoverfalsefalsefalsexbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 5 false0Portfolio Turnover [Heading]10false 4rr_PortfolioTurnoverTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 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. Because the Portfolio had not commenced investment operations prior to the date of this Prospectus, no portfolio turnover information is presented. falsefalsefalsenonnum:textBlockItemTypenaDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 3 false0Portfolio Turnover [Text Block]11false 4rr_OtherExpensesNewFundBasedOnEstimatesrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00"Other Expenses" are based on estimated amounts for the current fiscal year.falsefalsefalsexbrli:stringItemTypestringThis element represents the disclosure for new funds that "Other Expenses" are based on estimated amounts for the current fiscal year.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 6 -Subparagraph a false0Other Expenses, New Fund, Based on Estimates [Text]12false 4rr_ExpenseExampleHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Examplefalsefalsefalsexbrli:stringItemTypestringHeading for Expense Example.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false0Expense Example [Heading]13false 4rr_ExpenseExampleNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 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 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. Although your actual costs may be higher or lower, based on these assumptions your costs would be: falsefalsefalsenonnum:textBlockItemTypenaThe 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 1 false0Expense Example Narrative [Text Block]14false 4rr_StrategyHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Principal Investment Strategiesfalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false0Strategy [Heading]15false 4rr_StrategyNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 The Portfolio utilizes a flexible total return investment strategy. It typically invests primarily in debt securities issued or guaranteed by governments, government agencies or supranational bodies, forward contracts, including non-deliverable forward contracts, credit default swap agreements (on an index or basket of securities or a single security), interest rate swap agreements and foreign currency options, debt securities issued by companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds; short- and medium-term obligations and other fixed-income obligations. The Portfolio may also invest in certain other types of securities, such as convertible securities, commercial paper, and collateralized debt obligations. At certain times, based on the currently existing market environment, Lazard Asset Management LLC (the “Investment Manager”) may not believe it is able to find sufficient opportunities to invest in these types of securities and may determine to tactically shift the Portfolio to invest substantially in money market instruments, such as short-term US Treasury securities and certificates of deposit. The securities in which the Portfolio invests may be denominated in any currency. The Portfolio typically focuses its investments in securities of that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the Morgan Stanley Capital International (“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 is not limited to securities of any particular quality or investment grade and, as a result, the Portfolio may invest significantly in securities rated below investment grade (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 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 Investment Manager expects to actively increase and decrease the Portfolio’s exposures to emerging market securities and currencies, and to significantly utilize derivatives. The Portfolio expects to utilize the following types of derivatives: forward contracts (including non-deliverable forward contracts, which settle in cash based on the difference between the agreed upon contract price or rate and the prevailing spot price or rate on an agreed notional amount), credit default swap agreements (including credit default swap agreements on an index or basket of securities or a single security), interest rate swap agreements and foreign currency options. Derivative positions may represent a substantial investment exposure through the economic leverage embedded in these positions. Although the Portfolio does not have a history of operations, based on the portfolios of other clients of the Investment Manager managed in a strategy similar to that to be employed for the Portfolio, the aggregate notional amount of derivative positions may typically be expected to range from 20% to 70% of the Portfolio’s assets. The Investment Manager may change the Portfolio’s investment exposures frequently, and positions may be held for only a short period of time as the Investment Manager seeks to add value in different market environments in pursuit of the Portfolio’s total return objective. However, there is no guarantee that the Portfolio will achieve its investment objective, and an investment in the Portfolio involves a high degree of risk. The Portfolio is classified as “non-diversified” under the Investment Company Act of 1940, as amended (the “1940 Act”), which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund. falsefalsefalsenonnum:textBlockItemTypenaPrincipal 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false0Strategy Narrative [Text Block]16false 4rr_RiskHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Principal Investment Risksfalsefalsefalsexbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 false0Risk [Heading]17false 4rr_RiskNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 The value of your investment in the Portfolio will fluctuate, which means you could lose money. Fixed-Income and Debt Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes 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 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. Some debt securities may give the issuer the option to call, or redeem, the securities before their maturity. If securities held by the Portfolio are called during a time of declining interest rates (which is typically the case when issuers exercise options to call outstanding securities), the Portfolio may have to reinvest the proceeds in an investment offering a lower yield (and the Portfolio may not fully benefit from any increase in the value of its portfolio holdings as a result of declining interest rates). 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. 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 exposure to less developed or less efficient trading markets, political instability, a lack of company information, differing auditing and legal standards, and, potentially, less liquidity. In addition, investments denominated in currencies other than US dollars carry the risk that such currencies will decline in value relative to the US dollar and affect the value of these investments held in the Portfolio. 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 securities markets of emerging market countries have historically been extremely volatile. However, the capital markets in the US and internationally have experienced unprecedented volatility in recent years, causing significant declines in the value and liquidity of many securities. 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. Derivatives Risk. Derivatives transactions, including those entered into for hedging purposes, may reduce returns or increase volatility, perhaps substantially. Forward currency contracts, swap agreements and over-the-counter options on securities (including options on ETFs) and currencies are subject to the risk of default by the counterparty and can be illiquid. Changes in liquidity may result in significant, rapid and unpredictable changes in the prices for derivatives. 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, interest rate or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Successful use of derivatives is subject to the Investment Manager’s ability to predict correctly movements in the direction of the relevant reference asset or market. Use of derivatives transactions may cause the Portfolio to experience significant losses. 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 debt securities offerings of emerging markets issuers may be relatively smaller in size than debt 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. Non-Diversification Risk. Because the Portfolio may invest in a smaller number of issuers than other, more diversified investment portfolios, the Portfolio’s net asset value (“NAV”) may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers. 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 brokerage costs and an increase in taxable capital gains distributions to the Portfolio’s shareholders. falsefalsefalsenonnum:textBlockItemTypenaNarrative 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 -Subparagraph i -Clause instruction false0Risk Narrative [Text Block]18false 4rr_RiskLoseMoneyrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The value of your investment in the Portfolio will fluctuate, which means you could lose money.falsefalsefalsexbrli:stringItemTypestringSummarize the principal risks of investing in the Fund, including the risks to which the Fund's portfolio as a whole is subject and the circumstances reasonably likely to affect adversely the Fund's net asset value, yield, and total return. Unless the Fund is a Money Market Fund, disclose that loss of money is a risk of investing in the Fund. 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 -Subparagraph i false0Risk Lose Money [Text]19false 4rr_RiskNondiversifiedStatusrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Because the Portfolio may invest in a smaller number of issuers than other, more diversified investment portfolios, the Portfolio's net asset value ("NAV") may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio's investments consisted of securities issued by a larger number of issuers.falsefalsefalsexbrli:stringItemTypestringIf applicable, state that the Fund is non-diversified, describe the effect of non-diversification (e.g., disclose that, compared with other funds, the Fund may invest a greater percentage of its assets in a particular issuer), and summarize the risks of investing in a non-diversified fund.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 -Subparagraph iv false0Risk Nondiversified Status [Text]20false 4rr_BarChartAndPerformanceTableHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Performance Bar Chart and Tablefalsefalsefalsexbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 false0Bar Chart and Performance Table [Heading]21false 4rr_PerformanceNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 Because the Portfolio has not commenced investment operations prior to the date of this Prospectus, no performance returns are presented. Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year. Comparison of Portfolio performance to an appropriate index indicates how the Portfolio’s average annual returns compare with those of a broad measure of market performance. After the Portfolio commences investment operations, performance information will be available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance is not necessarily an indication of how the Portfolio will perform in the future. falsefalsefalsenonnum:textBlockItemTypenaRisk/Return Bar Chart and Table.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 false0Performance Narrative [Text Block]22false 4rr_PerformanceInformationIllustratesVariabilityOfReturnsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year.falsefalsefalsexbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false0Performance Information Illustrates Variability of Returns [Text]23false 4rr_PerformanceOneYearOrLessrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Because the Portfolio has not commenced investment operations prior to the date of this Prospectus, no performance returns are presented.falsefalsefalsexbrli:stringItemTypestringFor 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 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). Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 1 -Exhibit b false0Performance One Year or Less [Text]24false 4rr_PerformanceAvailabilityPhonerr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00(800) 823-6300falsefalsefalsexbrli:stringItemTypestringIf applicable, include a statement explaining that updated performance information is available and providing a Web site address and/or toll-free (or collect) telephone number where the updated information may be obtained.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false0Performance Availability Phone [Text]25false 4rr_PerformanceAvailabilityWebSiteAddressrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00www.LazardNet.comfalsefalsefalsexbrli:stringItemTypestringIf applicable, include a statement explaining that updated performance information is available and providing a Website address and/or toll-free (or collect) telephone number where the updated information may be obtained.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false0Performance Availability Website Address [Text]26false 4rr_PerformancePastDoesNotIndicateFuturerr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The Portfolio's past performance is not necessarily an indication of how the Portfolio will perform in the future.falsefalsefalsexbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false0Performance Past Does Not Indicate Future [Text]27false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2false USDtruefalse$S000041253Member_C000127908Memberhttp://www.sec.gov/CIK0000874964duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard Explorer Total Return Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000041253Memberdei_LegalEntityAxisexplicitMemberfalsefalseInstitutional Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000127908Memberrr_ProspectusShareClassAxisexplicitMemberpureStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Institutional Shares28true 3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Risk/Return:29false 4rr_RedemptionFeeOverRedemptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue-0.0100-0.0100falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 2 -Subparagraph b false0Redemption Fee (as a percentage of Amount Redeemed)30false 4rr_ManagementFeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.01000.0100falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph a false0Management Fees31false 4rr_DistributionAndService12b1FeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00000.0000falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 9 false0Distribution and Service (12b-1) Fees32false 4rr_OtherExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00300.0030[1]falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph c -Clause i false0Other Expenses33false 4rr_ExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.01300.0130falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph d false0Total Annual Portfolio Operating Expenses34false 4rr_ExpenseExampleYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue132132USD$falsetruefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false2Expense Example, with Redemption, 1 Year35false 4rr_ExpenseExampleYear03rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue412412USD$falsefalsefalserr: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. 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"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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 2 -Subparagraph b false0Redemption Fee (as a percentage of Amount Redeemed)39false 4rr_ManagementFeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.01000.0100falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph a false0Management Fees40false 4rr_DistributionAndService12b1FeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00250.0025falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 9 false0Distribution and Service (12b-1) Fees41false 4rr_OtherExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00350.0035[1]falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph c -Clause i false0Other Expenses42false 4rr_ExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.01600.0160falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph d false0Total Annual Portfolio Operating Expenses43false 4rr_ExpenseExampleYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue163163USD$falsefalsefalserr: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. 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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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a false0Objective [Heading]4false 4rr_ObjectivePrimaryTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 The Portfolio seeks maximum total return from a combination of capital appreciation and current income. falsefalsefalsenonnum:textBlockItemTypenaInvestment 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a false0Objective, Primary [Text Block]5false 4rr_ExpenseHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Fees and Expensesfalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 1 -Subparagraph d false0Expense [Heading]6false 4rr_ExpenseNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. falsefalsefalsenonnum:textBlockItemTypenaThis 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 1 -Subparagraph b false0Expense Narrative [Text Block]7false 4rr_ShareholderFeesCaptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Shareholder Transaction Fees (fees paid directly from your investment)falsefalsefalsexbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 false0Shareholder Fees Caption [Text]8false 4rr_OperatingExpensesCaptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsexbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 7 false0Operating Expenses Caption [Text]9false 4rr_FeeWaiverOrReimbursementOverAssetsDateOfTerminationrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse002014-06-28falsefalsefalsexbrli:stringItemTypestringThis element represents the date of expected termination of any expense reimbursement or fee waiver arrangements that reduce any Fund operating expenses (SEC Form N-1A 2006-09-14 A.3.table.1.11 Total Annual Fund Operating Expenses A.3.instructions.3.e).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph e false0Fee Waiver or Reimbursement over Assets, Date of Termination10false 4rr_PortfolioTurnoverHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Portfolio Turnoverfalsefalsefalsexbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 5 false0Portfolio Turnover [Heading]11false 4rr_PortfolioTurnoverTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 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. 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A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 3 false0Portfolio Turnover [Text Block]12false 4rr_PortfolioTurnoverRaterr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.260.26falsefalsefalsexbrli:pureItemTypepureThis element represents the rate of portfolio turnover presented as a percentage (SEC Form N-1A 2006-09-14 A.3.example.3 Portfolio Turnover A.3.instructions.5 Portfolio Turnover).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 3 false0Portfolio Turnover, Rate13false 4rr_ExpenseExampleHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Examplefalsefalsefalsexbrli:stringItemTypestringHeading for Expense Example.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false0Expense Example [Heading]14false 4rr_ExpenseExampleNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 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 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 in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be: falsefalsefalsenonnum:textBlockItemTypenaThe 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 1 false0Expense Example Narrative [Text Block]15false 4rr_StrategyHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Principal Investment Strategiesfalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false0Strategy [Heading]16false 4rr_StrategyNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 Under normal circumstances, the Portfolio invests at least 80% of its assets in fixed-income securities issued by corporations or other non-governmental issuers similar to corporations, which securities are tied economically to the US. The Portfolio typically will invest a substantial portion of its assets, and may invest up to 100% of its assets, in securities rated, at the time of purchase, below investment grade by S&P or Moody’s and as low as C or Ca by S&P or Moody’s, respectively, or the unrated equivalent as determined by the Investment Manager (“junk bonds”); however, the Portfolio focuses such investments in below investment grade securities that may be considered “better quality” (i.e., rated B1 or higher by Moody’s, B+ or higher by S&P or the unrated equivalent as determined by the Investment Manager). The Portfolio may invest in dollar-denominated securities of non-US companies, including, to a limited extent, in emerging market companies. Although the Portfolio may invest in fixed-income securities without regard to their maturity, the Portfolio’s average weighted maturity is expected to range between two and ten years. Securities are evaluated based on their fundamental and structural characteristics. Valuation analysis is tailored to the specific asset class, but may include credit research, prepayment or call options, maturity, duration, coupon, currency and country risks. The Portfolio is constructed using a bottom-up discipline in which the Investment Manager follows a systematic process to seek out undervalued opportunities within each sector. falsefalsefalsenonnum:textBlockItemTypenaPrincipal 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false0Strategy Narrative [Text Block]17false 4rr_RiskHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Principal Investment Risksfalsefalsefalsexbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 false0Risk [Heading]18false 4rr_RiskNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 The value of your investment in the Portfolio will fluctuate, which means you could lose money. 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. Fixed-Income Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes in interest rates. Interest rate risk, the risk that securities will decline in value because of changes in market interest rates, is usually greater for fixed-income securities with longer maturities or effective durations. The Portfolio’s investments in lower-rated, higher-yielding bonds are subject to greater credit risk than its higher-rated investments. Junk bonds tend to be more volatile, less liquid and are considered speculative. Other risk factors could have an effect on the Portfolio’s performance, including: <table style="MARGIN-LEFT: 0pc; FONT-SIZE: 0.2mm" cellspacing="0" cellpadding="0"> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> if an issuer fails to make timely interest or principal payments </td> </tr> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> if there is a decline, or a perceived decline, in the credit quality of a fixed-income security (or any guarantor of payment on such security) the security’s value could fall, potentially lowering the Portfolio’s share price </td> </tr> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> during unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like </td> </tr> </table> Non-US Company Securities Risk. The Portfolio’s performance will be influenced by political, social and economic factors affecting the non-US companies in which the Portfolio invests. Investments in securities of non-US companies carry special country-related risks, such as political instability, a lack of company information, differing auditing and legal standards, and, potentially, less liquidity. 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. falsefalsefalsenonnum:textBlockItemTypenaNarrative 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 -Subparagraph i -Clause instruction false0Risk Narrative [Text Block]19false 4rr_RiskLoseMoneyrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The value of your investment in the Portfolio will fluctuate, which means you could lose money.falsefalsefalsexbrli:stringItemTypestringSummarize the principal risks of investing in the Fund, including the risks to which the Fund's portfolio as a whole is subject and the circumstances reasonably likely to affect adversely the Fund's net asset value, yield, and total return. Unless the Fund is a Money Market Fund, disclose that loss of money is a risk of investing in the Fund. 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 -Subparagraph i false0Risk Lose Money [Text]20false 4rr_BarChartAndPerformanceTableHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31falsefalsefalsexbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 false0Bar Chart and Performance Table [Heading]21false 4rr_PerformanceNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Corporate Income 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 over the past 10 calendar years. 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. falsefalsefalsenonnum:textBlockItemTypenaRisk/Return Bar Chart and Table.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 false0Performance Narrative [Text Block]22false 4rr_PerformanceInformationIllustratesVariabilityOfReturnsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Corporate Income 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.falsefalsefalsexbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false0Performance Information Illustrates Variability of Returns [Text]23false 4rr_PerformanceAvailabilityPhonerr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00(800) 823-6300falsefalsefalsexbrli:stringItemTypestringIf applicable, include a statement explaining that updated performance information is available and providing a Web site address and/or toll-free (or collect) telephone number where the updated information may be obtained.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false0Performance Availability Phone [Text]24false 4rr_PerformanceAvailabilityWebSiteAddressrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00www.LazardNet.comfalsefalsefalsexbrli:stringItemTypestringIf applicable, include a statement explaining that updated performance information is available and providing a Website address and/or toll-free (or collect) telephone number where the updated information may be obtained.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false0Performance Availability Website Address [Text]25false 4rr_PerformancePastDoesNotIndicateFuturerr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The Portfolio's past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.falsefalsefalsexbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false0Performance Past Does Not Indicate Future [Text]26false 4rr_BarChartClosingTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<table cellspacing="0" style="width: 100%; margin-left: 0%; margin-right: 0%;"> <tr valign="top"> <td> </td> <td> Best Quarter: 6/30/09 13.08% Worst Quarter: 12/31/08 -15.96% </td> </tr> </table>falsefalsefalsenonnum:textBlockItemTypenaIf 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Bar Chart Closing [Text Block]27false 4rr_HighestQuarterlyReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Best Quarter:falsefalsefalsexbrli:stringItemTypestringIf 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Highest Quarterly Return, Label28false 4rr_BarChartHighestQuarterlyReturnDaterr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse002009-06-30falsefalsetruexbrli:dateItemTypedateIf 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Highest Quarterly Return, Date29false 4rr_BarChartHighestQuarterlyReturnrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.13080.1308falsefalsefalsexbrli: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.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Highest Quarterly Return30false 4rr_LowestQuarterlyReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Worst Quarter:falsefalsefalsexbrli:stringItemTypestringIf 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Lowest Quarterly Return, Label31false 4rr_BarChartLowestQuarterlyReturnDaterr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse002008-12-31falsefalsetruexbrli:dateItemTypedateIf 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Lowest Quarterly Return, Date32false 4rr_BarChartLowestQuarterlyReturnrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse-0.1596-0.1596falsefalsefalsexbrli: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.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Lowest Quarterly Return33false 4rr_PerformanceTableHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Average Annual Total Returns (for the periods ended December 31, 2012) falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit c false0Performance Table Heading34false 4rr_PerformanceTableMarketIndexChangedrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch BB-B US Cash Pay Non-Distressed High Yield Index instead of the Bank of America Merrill Lynch High Yield Master II Index, to reflect the Portfolio's focus on higher-yielding securities that may be considered "better quality."falsefalsefalsexbrli:stringItemTypestringIf the Fund selects an index that is different from the index used in a table for the immediately preceding period, explain the reason(s) for the selection of a different index and provide information for both the newly selected and the former index.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 2 -Exhibit c false0Performance Table Market Index Changed35false 4rr_IndexNoDeductionForFeesExpensesTaxesrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00(reflects no deduction for fees, expenses or taxes)falsefalsefalsexbrli:stringItemTypestringThe Performance Table includes a parenthetical, indicating that the Index "(reflects no deduction for fees, expenses or taxes)". This tag is used when this is reflected in a footnote.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 5 false0Index No Deduction for Fees, Expenses, Taxes [Text]36false 4rr_PerformanceTableUsesHighestFederalRaterr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00After-tax returns are calculated using the historical highest individual marginal income tax rates and do not reflect the impact of state and local taxes.falsefalsefalsexbrli:stringItemTypestringProvide a brief explanation that after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii false0Performance Table Uses Highest Federal Rate37false 4rr_PerformanceTableNotRelevantToTaxDeferredrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The 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.falsefalsefalsexbrli:stringItemTypestringProvide a brief explanation that the actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iv -Clause B false0Performance Table Not Relevant to Tax Deferred38false 4rr_PerformanceTableNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 After-tax returns for the Open Shares vary from those of Institutional Shares. 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. As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch BB-B US Cash Pay Non-Distressed High Yield® Index instead of the Bank of America Merrill Lynch High Yield Master II® Index, to reflect the Portfolio’s focus on higher-yielding securities that may be considered “better quality.” falsefalsefalsenonnum:textBlockItemTypenaIf 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 should show the returns of an appropriate broad-based 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iv false0Performance Table Narrative39false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2false 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Non-Distressed High Yield Index Institutional Shares Comparison (reflects no deduction for fees, expenses or taxes)40true 3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Risk/Return:41false 4rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.14270.1427falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false01 Year42false 4rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.07780.0778falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false05 Years43false 4rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.08470.0847falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false010 Years44false 4rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.06840.0684falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false0Life of Portfolio45false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse3false 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Index Open Shares Comparison (reflects no deduction for fees, expenses or taxes)46true 3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Risk/Return:47false 4rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.14270.1427falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false01 Year48false 4rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.07780.0778falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false05 Years49false 4rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.08470.0847falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false010 Years50false 4rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.06770.0677falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false0Life of Portfolio51false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse4false 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4rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.10390.1039falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false010 Years56false 4rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.07000.0700falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false0Life of Portfolio57false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse5false 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3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Risk/Return:59false 4rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.15580.1558falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false01 Year60false 4rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.10010.1001falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false05 Years61false 4rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.10390.1039falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false010 Years62false 4rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.06910.0691falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false0Life of Portfolio63false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse6false USDtruefalse$S000010265Member_C000028363Memberhttp://www.sec.gov/CIK0000874964duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard US Corporate Income Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000010265Memberdei_LegalEntityAxisexplicitMemberfalsefalseInstitutional Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000028363Memberrr_ProspectusShareClassAxisexplicitMemberpureStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse0Institutional Shares64true 3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Risk/Return:65false 4rr_RedemptionFeeOverRedemptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue-0.0100-0.0100falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 2 -Subparagraph b false0Redemption Fee (as a percentage of Amount Redeemed)66false 4rr_ManagementFeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00550.0055falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph a false0Management Fees67false 4rr_DistributionAndService12b1FeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00000.0000falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 9 false0Distribution and Service (12b-1) Fees68false 4rr_OtherExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00160.0016falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph c -Clause i false0Other Expenses69false 4rr_ExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00710.0071falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph d false0Total Annual Portfolio Operating Expenses70false 4rr_FeeWaiverOrReimbursementOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue-0.0016-0.0016[1]falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Fee Waiver or Reimbursement71false 4rr_NetExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00550.0055[1]falsefalsefalserr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement72false 4rr_ExpenseExampleYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue5656USD$falsetruefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false2Expense Example, with Redemption, 1 Year73false 4rr_ExpenseExampleYear03rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue211211USD$falsefalsefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false2Expense Example, with Redemption, 3 Years74false 4rr_ExpenseExampleYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue379379USD$falsefalsefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false2Expense Example, with Redemption, 5 Years75false 4rr_ExpenseExampleYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue867867USD$falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false2Expense Example, with Redemption, 10 Years76false 4rr_AnnualReturn2003rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.24580.2458falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false0Annual Return 200377false 4rr_AnnualReturn2004rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.09880.0988falsefalsefalsexbrli: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. 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The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false0Annual Return 200478false 4rr_AnnualReturn2005rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.04330.0433falsefalsefalsexbrli: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. 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The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 200579false 4rr_AnnualReturn2006rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.09710.0971falsefalsefalsexbrli: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. 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The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 200680false 4rr_AnnualReturn2007rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.03630.0363falsefalsefalsexbrli: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. 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The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 200882false 4rr_AnnualReturn2009rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.34660.3466falsefalsefalsexbrli: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. 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"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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 2 -Subparagraph b false0Redemption Fee (as a percentage of Amount Redeemed)106false 4rr_ManagementFeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00550.0055falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph a false0Management Fees107false 4rr_DistributionAndService12b1FeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00250.0025falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 9 false0Distribution and Service (12b-1) Fees108false 4rr_OtherExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00440.0044falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph c -Clause i false0Other Expenses109false 4rr_ExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.01240.0124falsefalsefalserr: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. 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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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Fee Waiver or Reimbursement111false 4rr_NetExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00850.0085[1]falsefalsefalserr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement112false 4rr_ExpenseExampleYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue8787USD$falsefalsefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false2Expense Example, with Redemption, 1 Year113false 4rr_ExpenseExampleYear03rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue355355USD$falsefalsefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false2Expense Example, with Redemption, 3 Years114false 4rr_ExpenseExampleYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue643643USD$falsefalsefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false2Expense Example, with Redemption, 5 Years115false 4rr_ExpenseExampleYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue14661466USD$falsetruefalserr: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. 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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.falseRisk/Return Detail Data - Lazard US Corporate Income Portfolio (Lazard US Corporate Income Portfolio, USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://lazardnet.com/20130625/role/DisclosureRiskReturnDetailDataElementsLazardUSCorporateIncomePortfolio1120 XML 10 R12.xml IDEA: Risk/Return Detail Data - Lazard US Short Duration Fixed Income Portfolio 2.4.0.8020010 - Disclosure - Risk/Return Detail Data {Elements} - Lazard US Short Duration Fixed Income Portfoliotruetruefalse1false falsefalseS000031124Memberhttp://www.sec.gov/CIK0000874964duration2012-12-31T00:00:002012-12-31T00:00:00pureStandardhttp://www.xbrl.org/2003/instancepurexbrli01true 3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Risk/Return:2false 4rr_RiskReturnHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Lazard US Short Duration Fixed Income Portfoliofalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 false0Risk/Return [Heading]3false 4rr_ObjectiveHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Investment Objectivefalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a false0Objective [Heading]4false 4rr_ObjectivePrimaryTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 The Portfolio seeks total return and preservation of capital. falsefalsefalsenonnum:textBlockItemTypenaInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. 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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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 1 -Subparagraph d false0Expense [Heading]6false 4rr_ExpenseNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. falsefalsefalsenonnum:textBlockItemTypenaThis 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 1 -Subparagraph b false0Expense Narrative [Text Block]7false 4rr_OperatingExpensesCaptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsexbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 7 false0Operating Expenses Caption [Text]8false 4rr_FeeWaiverOrReimbursementOverAssetsDateOfTerminationrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse002014-06-28falsefalsefalsexbrli:stringItemTypestringThis element represents the date of expected termination of any expense reimbursement or fee waiver arrangements that reduce any Fund operating expenses (SEC Form N-1A 2006-09-14 A.3.table.1.11 Total Annual Fund Operating Expenses A.3.instructions.3.e).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph e false0Fee Waiver or Reimbursement over Assets, Date of Termination9false 4rr_PortfolioTurnoverHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Portfolio Turnoverfalsefalsefalsexbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 5 false0Portfolio Turnover [Heading]10false 4rr_PortfolioTurnoverTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 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 77% of the average value of its portfolio. falsefalsefalsenonnum:textBlockItemTypenaDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 3 false0Portfolio Turnover [Text Block]11false 4rr_PortfolioTurnoverRaterr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.770.77falsefalsefalsexbrli:pureItemTypepureThis element represents the rate of portfolio turnover presented as a percentage (SEC Form N-1A 2006-09-14 A.3.example.3 Portfolio Turnover A.3.instructions.5 Portfolio Turnover).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 3 false0Portfolio Turnover, Rate12false 4rr_ExpenseExampleHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Examplefalsefalsefalsexbrli:stringItemTypestringHeading for Expense Example.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false0Expense Example [Heading]13false 4rr_ExpenseExampleNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 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 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 in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be: falsefalsefalsenonnum:textBlockItemTypenaThe 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 1 false0Expense Example Narrative [Text Block]14false 4rr_StrategyHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Principal Investment Strategiesfalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false0Strategy [Heading]15false 4rr_StrategyNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 Under normal circumstances, the Portfolio invests at least 80% of its assets in fixed-income securities of US issuers, including US government securities, corporate securities, mortgage-related and asset-backed securities, convertible securities, municipal securities, structured products, preferred stocks and inflation- indexed-securities. These securities may have any type of interest rate payment terms, including fixed rate, adjustable rate or zero coupon features. Under normal circumstances, the Portfolio’s investment portfolio can be expected to have an average effective duration of three years or less. 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 invests primarily in securities that are rated investment grade by one or more nationally recognized statistical rating organizations (or, if unrated, determined by the Investment Manager to be of comparable quality). Securities are evaluated based on their fundamental and structural characteristics. Valuation analysis is tailored to the specific asset class, but may include credit research and analysis of features such as prepayment or call options, maturity, duration and coupon. falsefalsefalsenonnum:textBlockItemTypenaPrincipal 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false0Strategy Narrative [Text Block]16false 4rr_RiskHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Principal Investment Risksfalsefalsefalsexbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 false0Risk [Heading]17false 4rr_RiskNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 The value of your investment in the Portfolio will fluctuate, which means you could lose money. 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. Fixed-Income Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes in interest rates (i.e., as interest rates go up, prices go down). Interest rate risk is usually greater for fixed-income securities with longer maturities or effective durations. Other risk factors could have an effect on the Portfolio’s performance, including: <table style="MARGIN-LEFT: 0pc; FONT-SIZE: 0.2mm" cellspacing="0" cellpadding="0"> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr> <td> </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> if an issuer fails to make timely interest or principal payments (known as credit risk) </td> </tr> <tr> <td> </td> </tr> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> if there is a decline, or a perceived decline, in the credit quality of a fixed income security (or any guarantor of payment on such security) the security’s value could fall, potentially lowering the Portfolio’s share price </td> </tr> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> during unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like </td> </tr> </table> Adjustable rate securities provide the Portfolio with a certain degree of protection against rises in interest rates, although the Portfolio will participate in any declines in interest rates as well. Certain adjustable rate securities, such as those with interest rates that fluctuate directly or indirectly based on multiples of a stated index, are designed to be highly sensitive to changes in interest rates and can subject the holders thereof to extreme reductions of yield and possibly loss of principal. Certain fixed-income securities may be issued at a discount from their face value (such as zero coupon securities) or purchased at a price less than their stated face amount or at a price less than their issue price plus the portion of “original issue discount” previously accrued thereon, i.e., purchased at a “market discount.” The amount of original issue discount and/or market discount on certain obligations may be significant, and accretion of market discount together with original issue discount will cause the Portfolio to realize income prior to the receipt of cash payments with respect to these securities. Mortgage-Related and Asset-Backed Securities Risk. Mortgage-related securities are complex instruments, subject to both credit and prepayment risk, and may be more volatile and less liquid, and more difficult to price accurately, than more traditional debt securities. Although payments relating to certain mortgage-related securities are guaranteed by a third party (such as a US Government agency or instrumentality with respect to government-related mortgage-backed securities) or otherwise similarly secured, the market value of the security, which may fluctuate, is not secured. Mortgage-related securities generally are subject to credit risks associated with the performance of the underlying mortgage properties. Prepayment risk can lead to fluctuations in value of the mortgage-related security which may be pronounced. As with other interest-bearing securities, the prices of certain mortgage-related securities are inversely affected by changes in interest rates. However, although the value of a mortgage-related security may decline when interest rates rise, the converse is not necessarily true, since during periods of declining interest rates the mortgages underlying the security are more likely to be prepaid. The risks of asset-backed securities are similar to those of mortgage-related securities. However, asset-backed securities present certain risks that are not presented by mortgage-related securities. Primarily, these securities may provide the Portfolio with a less effective security interest in the related collateral than do mortgage-related securities. Structured Products Risk. Structured notes and other structured products 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 products can have risks of both fixed-income securities and derivatives transactions. Derivatives transactions may reduce returns or increase volatility, perhaps substantially, and they are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related reference assets, markets or rates. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions. falsefalsefalsenonnum:textBlockItemTypenaNarrative 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 -Subparagraph i -Clause instruction false0Risk Narrative [Text Block]18false 4rr_RiskLoseMoneyrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The value of your investment in the Portfolio will fluctuate, which means you could lose money.falsefalsefalsexbrli:stringItemTypestringSummarize the principal risks of investing in the Fund, including the risks to which the Fund's portfolio as a whole is subject and the circumstances reasonably likely to affect adversely the Fund's net asset value, yield, and total return. Unless the Fund is a Money Market Fund, disclose that loss of money is a risk of investing in the Fund. 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 -Subparagraph i false0Risk Lose Money [Text]19false 4rr_BarChartAndPerformanceTableHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Performance Bar Chart and Table Total Returns for Institutional Shares As of 12/31falsefalsefalsexbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 false0Bar Chart and Performance Table [Heading]20false 4rr_PerformanceNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Short Duration Fixed Income Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to those of a broad measure of market performance. The bar chart shows the performance of the Portfolio’s Institutional Shares. 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. falsefalsefalsenonnum:textBlockItemTypenaRisk/Return Bar Chart and Table.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 false0Performance Narrative [Text Block]21false 4rr_PerformanceInformationIllustratesVariabilityOfReturnsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Short Duration Fixed Income Portfolio by showing the Portfolio's performance for the first complete calendar year of operation compared to those of a broad measure of market performance.falsefalsefalsexbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false0Performance Information Illustrates Variability of Returns [Text]22false 4rr_PerformanceAvailabilityPhonerr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00(800) 823-6300falsefalsefalsexbrli:stringItemTypestringIf applicable, include a statement explaining that updated performance information is available and providing a Web site address and/or toll-free (or collect) telephone number where the updated information may be obtained.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false0Performance Availability Phone [Text]23false 4rr_PerformanceAvailabilityWebSiteAddressrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00www.LazardNet.comfalsefalsefalsexbrli:stringItemTypestringIf applicable, include a statement explaining that updated performance information is available and providing a Website address and/or toll-free (or collect) telephone number where the updated information may be obtained.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false0Performance Availability Website Address [Text]24false 4rr_PerformancePastDoesNotIndicateFuturerr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The Portfolio's past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.falsefalsefalsexbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false0Performance Past Does Not Indicate Future [Text]25false 4rr_BarChartClosingTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<table cellspacing="0" style="width: 100%; margin-left: 0%; margin-right: 0%;"> <tr valign="top"> <td> </td> <td> Best Quarter: 6/30/12 1.22% Worst Quarter: 12/31/12 -0.02% </td> </tr> </table>falsefalsefalsenonnum:textBlockItemTypenaIf 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Bar Chart Closing [Text Block]26false 4rr_HighestQuarterlyReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Best Quarter:falsefalsefalsexbrli:stringItemTypestringIf 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Highest Quarterly Return, Label27false 4rr_BarChartHighestQuarterlyReturnDaterr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse002012-06-30falsefalsetruexbrli:dateItemTypedateIf 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Highest Quarterly Return, Date28false 4rr_BarChartHighestQuarterlyReturnrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.01220.0122falsefalsefalsexbrli: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.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Highest Quarterly Return29false 4rr_LowestQuarterlyReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Worst Quarter:falsefalsefalsexbrli:stringItemTypestringIf 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Lowest Quarterly Return, Label30false 4rr_BarChartLowestQuarterlyReturnDaterr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse002012-12-31falsefalsetruexbrli:dateItemTypedateIf 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Lowest Quarterly Return, Date31false 4rr_BarChartLowestQuarterlyReturnrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse-0.0002-0.0002falsefalsefalsexbrli: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.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Lowest Quarterly Return32false 4rr_PerformanceTableHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Average Annual Total Returns (for the periods ended December 31, 2012) falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit c false0Performance Table Heading33false 4rr_PerformanceTableMarketIndexChangedrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch 1-3 Year Treasury Index to reflect its change from a municipal fund to its current investment strategy as of such date.falsefalsefalsexbrli:stringItemTypestringIf the Fund selects an index that is different from the index used in a table for the immediately preceding period, explain the reason(s) for the selection of a different index and provide information for both the newly selected and the former index.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 2 -Exhibit c false0Performance Table Market Index Changed34false 4rr_IndexNoDeductionForFeesExpensesTaxesrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00(reflects no deduction for fees, expenses or taxes)falsefalsefalsexbrli:stringItemTypestringThe Performance Table includes a parenthetical, indicating that the Index "(reflects no deduction for fees, expenses or taxes)". This tag is used when this is reflected in a footnote.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 5 false0Index No Deduction for Fees, Expenses, Taxes [Text]35false 4rr_PerformanceTableUsesHighestFederalRaterr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00After-tax returns are calculated using the historical highest individual marginal income tax rates and do not reflect the impact of state and local taxes.falsefalsefalsexbrli:stringItemTypestringProvide a brief explanation that after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii false0Performance Table Uses Highest Federal Rate36false 4rr_PerformanceTableNotRelevantToTaxDeferredrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The 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.falsefalsefalsexbrli:stringItemTypestringProvide a brief explanation that the actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iv -Clause B false0Performance Table Not Relevant to Tax Deferred37false 4rr_PerformanceTableNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 After-tax returns for the Open Shares vary from those of Institutional Shares. 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. As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch 1-3 Year Treasury® Index to reflect its change from a municipal fund to its current investment strategy as of such date. falsefalsefalsenonnum:textBlockItemTypenaIf 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 should show the returns of an appropriate broad-based 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iv false0Performance Table Narrative38false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2false truefalseS000031124Member_index_Bank_of_America_Merrill_Lynch_13_Year_Treasury_Index_reflects_no_deduction_for_fees_expenses_or_taxesMemberhttp://www.sec.gov/CIK0000874964duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard US Short Duration Fixed Income Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000031124Memberdei_LegalEntityAxisexplicitMemberfalsefalseBank of America Merrill Lynch 1-3 Year Treasury Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_index_Bank_of_America_Merrill_Lynch_13_Year_Treasury_Index_reflects_no_deduction_for_fees_expenses_or_taxesMemberrr_PerformanceMeasureAxisexplicitMemberpureStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse0Bank of America Merrill Lynch 1-3 Year Treasury Index (reflects no deduction for fees, expenses or taxes)39true 3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse0Risk/Return:40false 4rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.00430.0043falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false01 Year41false 4rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.01070.0107falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false0Life of Portfolio42false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse3false truefalseS000031124Member_index_Bank_of_America_Merrill_Lynch_110_Year_Municipal_Bond_Index_reflects_no_deduction_for_fees_expenses_or_taxesMemberhttp://www.sec.gov/CIK0000874964duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard US Short Duration Fixed Income 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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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 9 false0Distribution and Service (12b-1) Fees50false 4rr_OtherExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.01160.0116falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph c -Clause i false0Other Expenses51false 4rr_ExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.01410.0141falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph d false0Total Annual Portfolio Operating Expenses52false 4rr_FeeWaiverOrReimbursementOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue-0.0101-0.0101[1]falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Fee Waiver or Reimbursement53false 4rr_NetExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00400.0040[1]falsefalsefalserr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement54false 4rr_ExpenseExampleYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue4141USD$falsetruefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false2Expense Example, with Redemption, 1 Year55false 4rr_ExpenseExampleYear03rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue347347USD$falsefalsefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false2Expense Example, with Redemption, 3 Years56false 4rr_ExpenseExampleYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue675675USD$falsefalsefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false2Expense Example, with Redemption, 5 Years57false 4rr_ExpenseExampleYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue16031603USD$falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false2Expense Example, with Redemption, 10 Years58false 4rr_AnnualReturn2012rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.02540.0254falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 201259false 4rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.02540.0254falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false01 Year60false 4rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.03810.0381falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 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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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 9 false0Distribution and Service (12b-1) Fees74false 4rr_OtherExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.37610.3761falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph c -Clause i false0Other Expenses75false 4rr_ExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.38110.3811falsefalsefalserr: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. 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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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph d false0Total Annual Portfolio Operating Expenses76false 4rr_FeeWaiverOrReimbursementOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue-0.3741-0.3741[1]falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Fee Waiver or Reimbursement77false 4rr_NetExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00700.0070[1]falsefalsefalserr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement78false 4rr_ExpenseExampleYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue7272USD$falsefalsefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false2Expense Example, with Redemption, 1 Year79false 4rr_ExpenseExampleYear03rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue56075607USD$falsefalsefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false2Expense Example, with Redemption, 3 Years80false 4rr_ExpenseExampleYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue80848084USD$falsefalsefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false2Expense Example, with Redemption, 5 Years81false 4rr_ExpenseExampleYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue98219821USD$falsetruefalserr: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. 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This agreement can only be amended by agreement of the Fund, upon approval by the Fund's Board of Directors (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.falseRisk/Return Detail Data - Lazard US Short Duration Fixed Income Portfolio (Lazard US Short Duration Fixed Income Portfolio, USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://lazardnet.com/20130625/role/DisclosureRiskReturnDetailDataElementsLazardUSShortDurationFixedIncomePortfolio184 XML 11 R6.htm IDEA: XBRL DOCUMENT

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Explorer Total Return 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, a series of The Lazard Funds, Inc. (the “Fund”).

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Transaction 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)

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. Because the Portfolio had not commenced investment operations prior to the date of this Prospectus, no portfolio turnover information is presented.

Other Expenses, New Fund, Based on Estimates [Text]

rr_OtherExpensesNewFundBasedOnEstimates

"Other Expenses" are based on estimated amounts for the current fiscal year.

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 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. 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 Portfolio utilizes a flexible total return investment strategy. It typically invests primarily in debt securities issued or guaranteed by governments, government agencies or supranational bodies, forward contracts, including non-deliverable forward contracts, credit default swap agreements (on an index or basket of securities or a single security), interest rate swap agreements and foreign currency options, debt securities issued by companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds; short- and medium-term obligations and other fixed-income obligations. The Portfolio may also invest in certain other types of securities, such as convertible securities, commercial paper, and collateralized debt obligations. At certain times, based on the currently existing market environment, Lazard Asset Management LLC (the “Investment Manager”) may not believe it is able to find sufficient opportunities to invest in these types of securities and may determine to tactically shift the Portfolio to invest substantially in money market instruments, such as short-term US Treasury securities and certificates of deposit. The securities in which the Portfolio invests may be denominated in any currency.

The Portfolio typically focuses its investments in securities of that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the Morgan Stanley Capital International (“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 is not limited to securities of any particular quality or investment grade and, as a result, the Portfolio may invest significantly in securities rated below investment grade (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 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 Investment Manager expects to actively increase and decrease the Portfolio’s exposures to emerging market securities and currencies, and to significantly utilize derivatives. The Portfolio expects to utilize the following types of derivatives: forward contracts (including non-deliverable forward contracts, which settle in cash based on the difference between the agreed upon contract price or rate and the prevailing spot price or rate on an agreed notional amount), credit default swap agreements (including credit default swap agreements on an index or basket of securities or a single security), interest rate swap agreements and foreign currency options. Derivative positions may represent a substantial investment exposure through the economic leverage embedded in these positions. Although the Portfolio does not have a history of operations, based on the portfolios of other clients of the Investment Manager managed in a strategy similar to that to be employed for the Portfolio, the aggregate notional amount of derivative positions may typically be expected to range from 20% to 70% of the Portfolio’s assets. The Investment Manager may change the Portfolio’s investment exposures frequently, and positions may be held for only a short period of time as the Investment Manager seeks to add value in different market environments in pursuit of the Portfolio’s total return objective. However, there is no guarantee that the Portfolio will achieve its investment objective, and an investment in the Portfolio involves a high degree of risk.

The Portfolio is classified as “non-diversified” under the Investment Company Act of 1940, as amended (the “1940 Act”), which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

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.

Fixed-Income and Debt Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes 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 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.

Some debt securities may give the issuer the option to call, or redeem, the securities before their maturity. If securities held by the Portfolio are called during a time of declining interest rates (which is typically the case when issuers exercise options to call outstanding securities), the Portfolio may have to reinvest the proceeds in an investment offering a lower yield (and the Portfolio may not fully benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

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.

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 exposure to less developed or less efficient trading markets, political instability, a lack of company information, differing auditing and legal standards, and, potentially, less liquidity. In addition, investments denominated in currencies other than US dollars carry the risk that such currencies will decline in value relative to the US dollar and affect the value of these investments held in the Portfolio.

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 securities markets of emerging market countries have historically been extremely volatile. However, the capital markets in the US and internationally have experienced unprecedented volatility in recent years, causing significant declines in the value and liquidity of many securities. 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.

Derivatives Risk. Derivatives transactions, including those entered into for hedging purposes, may reduce returns or increase volatility, perhaps substantially. Forward currency contracts, swap agreements and over-the-counter options on securities (including options on ETFs) and currencies are subject to the risk of default by the counterparty and can be illiquid. Changes in liquidity may result in significant, rapid and unpredictable changes in the prices for derivatives. 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, interest rate or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Successful use of derivatives is subject to the Investment Manager’s ability to predict correctly movements in the direction of the relevant reference asset or market. Use of derivatives transactions may cause the Portfolio to experience significant losses.

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 debt securities offerings of emerging markets issuers may be relatively smaller in size than debt 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.

Non-Diversification Risk. Because the Portfolio may invest in a smaller number of issuers than other, more diversified investment portfolios, the Portfolio’s net asset value (“NAV”) may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 brokerage costs and an increase in taxable capital gains distributions to the Portfolio’s shareholders.

Risk Lose Money [Text]

rr_RiskLoseMoney

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

Risk Nondiversified Status [Text]

rr_RiskNondiversifiedStatus

Because the Portfolio may invest in a smaller number of issuers than other, more diversified investment portfolios, the Portfolio's net asset value ("NAV") may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio's investments consisted of securities issued by a larger number of issuers.

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

Performance Bar Chart and Table

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

Because the Portfolio has not commenced investment operations prior to the date of this Prospectus, no performance returns are presented. Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year. Comparison of Portfolio performance to an appropriate index indicates how the Portfolio’s average annual returns compare with those of a broad measure of market performance. After the Portfolio commences investment operations, performance information will be available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance is not necessarily an indication of how the Portfolio will perform in the future.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year.

Performance One Year or Less [Text]

rr_PerformanceOneYearOrLess

Because the Portfolio has not commenced investment operations prior to the date of this Prospectus, no performance returns are presented.

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 is not necessarily an indication of how the Portfolio will perform in the future.

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.30%

^[1]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.30%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

$ 132

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

412

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

1.00%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.35%

^[1]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.60%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

163

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

$ 505

[1]	"Other Expenses" are based on estimated amounts for the current fiscal year.

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"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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 2 -Subparagraph b false0Shareholder Transaction Fees (fees paid directly from your investment) Maximum Redemption Fee (as a % of amount redeemed, on shares owned for 30 days or less) 0rr_RedemptionFeeOverRedemptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel1truetruetrue0.01000.0100falsefalsefalse2truetruetrue0.01000.0100falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 2 -Subparagraph b false0Shareholder Transaction Fees (fees paid directly from your investment) Maximum Redemption Fee (as a % of amount redeemed, on shares owned for 30 days or less)falseShareholder Fees Lazard Explorer Total Return PortfolioUnKnownUnKnownUnKnownUnKnownfalsefalsefalseSheet21102108ColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000874964_S000041253MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsenonnum:textBlockItemTypenaContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No definition available.false0Shareholder Fees [Table]9false 4rr_OperatingExpensesCaptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsexbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 7 false0Operating Expenses Caption [Text]10false 4rr_AnnualFundOperatingExpensesTableTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://lazardnet.com/20130625/role/ScheduleAnnualFundOperatingExpenses20002 column dei_LegalEntityAxis compact cik0000874964_S000041253Member row primary compact * ~falsefalse~ http://lazardnet.com/20130625/role/ScheduleAnnualFundOperatingExpenses20002 column dei_LegalEntityAxis compact cik0000874964_S000041253Member row primary compact * ~falsehttp://lazardnet.com/20130625/role/ScheduleAnnualFundOperatingExpenses20002020002 - Schedule - Annual Fund Operating Expensestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000874964_S000041253MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard Explorer Total Return Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000041253Memberdei_LegalEntityAxisexplicitMemberfalsefalseInstitutional Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000127908Memberrr_ProspectusShareClassAxisexplicitMemberLazard Explorer Total Return PortfolioInstitutional SharespureStandardhttp://www.xbrl.org/2003/instancepurexbrli0Standard0 USDfalsefalseduration2012-12-31T00:00:002012-12-31T00:00:00$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000874964_S000041253MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard Explorer Total Return Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000041253Memberdei_LegalEntityAxisexplicitMemberfalsefalseOpen Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000127909Memberrr_ProspectusShareClassAxisexplicitMemberLazard Explorer Total Return PortfolioOpen SharespureStandardhttp://www.xbrl.org/2003/instancepurexbrli0Standard0 USDfalsefalseduration2012-12-31T00:00:002012-12-31T00:00:00$1falseRowprimaryElement*3false 4rr_ManagementFeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph a false0Management Fees 0rr_ManagementFeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.01000.0100falsefalsefalse2truetruetrue0.01000.0100falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph a false0Management Fees2falseRowprimaryElement*4false 4rr_DistributionAndService12b1FeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 9 false0Distribution and Service (12b-1) Fees 0rr_DistributionAndService12b1FeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00000.0000falsefalsefalse2truetruetrue0.00250.0025falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 9 false0Distribution and Service (12b-1) Fees3falseRowprimaryElement*5false 4rr_OtherExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph c -Clause i false0Other Expenses 0rr_OtherExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel[1]1truetruetrue0.00300.0030falsefalsefalse2truetruetrue0.00350.0035falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph c -Clause i false0Other Expenses4falseRowprimaryElement*6false 4rr_ExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph d false0Total Annual Portfolio Operating Expenses 0rr_ExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.01300.0130falsefalsefalse2truetruetrue0.01600.0160falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph d false0Total Annual Portfolio Operating Expenses1"Other Expenses" are based on estimated amounts for the current fiscal year.falseAnnual Fund Operating Expenses Lazard Explorer Total Return PortfolioUnKnownUnKnownUnKnownUnKnownfalsefalsefalseSheet244624014ColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000874964_S000041253MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsenonnum:textBlockItemTypenaContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No definition available.false0Annual Fund Operating Expenses [Table]11false 4rr_ExpenseExampleHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Examplefalsefalsefalsexbrli:stringItemTypestringHeading for Expense Example.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false0Expense Example [Heading]12false 4rr_ExpenseExampleNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 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 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. Although your actual costs may be higher or lower, based on these assumptions your costs would be: falsefalsefalsenonnum:textBlockItemTypenaThe 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 1 false0Expense Example Narrative [Text Block]13false 4rr_ExpenseExampleWithRedemptionTableTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://lazardnet.com/20130625/role/ScheduleExpenseExampleTransposed20003 column dei_LegalEntityAxis compact cik0000874964_S000041253Member row primary compact * ~falsefalse~ http://lazardnet.com/20130625/role/ScheduleExpenseExampleTransposed20003 column dei_LegalEntityAxis compact cik0000874964_S000041253Member row primary compact * ~truehttp://lazardnet.com/20130625/role/ScheduleExpenseExampleTransposed20003020003 - Schedule - Expense Example {Transposed}truefalsefalse1falseColumnprimaryElement*3false 4rr_ExpenseExampleYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false21 Year USDfalsefalse$2falseColumnprimaryElement*4false 4rr_ExpenseExampleYear03rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false23 Years USDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000874964_S000041253MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard Explorer Total Return Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000041253Memberdei_LegalEntityAxisexplicitMemberfalsefalseInstitutional Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000127908Memberrr_ProspectusShareClassAxisexplicitMemberLazard Explorer Total Return PortfolioInstitutional SharesusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170 0truefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue132132falsefalsefalse2truefalsetrue412412falsefalsefalsenanafalse0Institutional Shares2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000874964_S000041253MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard Explorer Total Return Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000041253Memberdei_LegalEntityAxisexplicitMemberfalsefalseOpen Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000127909Memberrr_ProspectusShareClassAxisexplicitMemberLazard Explorer Total Return PortfolioOpen SharesusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170 0truefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue163163falsefalsefalse2truefalsetrue505505falsefalsefalsenanafalse0Open SharesfalseExpense Example Lazard Explorer Total Return Portfolio (USD $)UnKnownUnKnownUnKnownUnKnownfalsefalsefalseSheet222222014ColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000874964_S000041253MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsenonnum:textBlockItemTypenaContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No definition available.false0Expense Example, With Redemption [Table]14false 4rr_PortfolioTurnoverHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Portfolio Turnoverfalsefalsefalsexbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 5 false0Portfolio Turnover [Heading]15false 4rr_PortfolioTurnoverTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 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. Because the Portfolio had not commenced investment operations prior to the date of this Prospectus, no portfolio turnover information is presented. falsefalsefalsenonnum:textBlockItemTypenaDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 3 false0Portfolio Turnover [Text Block]16false 4rr_StrategyHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Principal Investment Strategiesfalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false0Strategy [Heading]17false 4rr_StrategyNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 The Portfolio utilizes a flexible total return investment strategy. It typically invests primarily in debt securities issued or guaranteed by governments, government agencies or supranational bodies, forward contracts, including non-deliverable forward contracts, credit default swap agreements (on an index or basket of securities or a single security), interest rate swap agreements and foreign currency options, debt securities issued by companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds; short- and medium-term obligations and other fixed-income obligations. The Portfolio may also invest in certain other types of securities, such as convertible securities, commercial paper, and collateralized debt obligations. At certain times, based on the currently existing market environment, Lazard Asset Management LLC (the “Investment Manager”) may not believe it is able to find sufficient opportunities to invest in these types of securities and may determine to tactically shift the Portfolio to invest substantially in money market instruments, such as short-term US Treasury securities and certificates of deposit. The securities in which the Portfolio invests may be denominated in any currency. The Portfolio typically focuses its investments in securities of that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the Morgan Stanley Capital International (“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 is not limited to securities of any particular quality or investment grade and, as a result, the Portfolio may invest significantly in securities rated below investment grade (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 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 Investment Manager expects to actively increase and decrease the Portfolio’s exposures to emerging market securities and currencies, and to significantly utilize derivatives. The Portfolio expects to utilize the following types of derivatives: forward contracts (including non-deliverable forward contracts, which settle in cash based on the difference between the agreed upon contract price or rate and the prevailing spot price or rate on an agreed notional amount), credit default swap agreements (including credit default swap agreements on an index or basket of securities or a single security), interest rate swap agreements and foreign currency options. Derivative positions may represent a substantial investment exposure through the economic leverage embedded in these positions. Although the Portfolio does not have a history of operations, based on the portfolios of other clients of the Investment Manager managed in a strategy similar to that to be employed for the Portfolio, the aggregate notional amount of derivative positions may typically be expected to range from 20% to 70% of the Portfolio’s assets. The Investment Manager may change the Portfolio’s investment exposures frequently, and positions may be held for only a short period of time as the Investment Manager seeks to add value in different market environments in pursuit of the Portfolio’s total return objective. However, there is no guarantee that the Portfolio will achieve its investment objective, and an investment in the Portfolio involves a high degree of risk. The Portfolio is classified as “non-diversified” under the Investment Company Act of 1940, as amended (the “1940 Act”), which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund. falsefalsefalsenonnum:textBlockItemTypenaPrincipal 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false0Strategy Narrative [Text Block]18false 4rr_RiskHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Principal Investment Risksfalsefalsefalsexbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 false0Risk [Heading]19false 4rr_RiskNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 The value of your investment in the Portfolio will fluctuate, which means you could lose money. Fixed-Income and Debt Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes 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 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. Some debt securities may give the issuer the option to call, or redeem, the securities before their maturity. If securities held by the Portfolio are called during a time of declining interest rates (which is typically the case when issuers exercise options to call outstanding securities), the Portfolio may have to reinvest the proceeds in an investment offering a lower yield (and the Portfolio may not fully benefit from any increase in the value of its portfolio holdings as a result of declining interest rates). 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. 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 exposure to less developed or less efficient trading markets, political instability, a lack of company information, differing auditing and legal standards, and, potentially, less liquidity. In addition, investments denominated in currencies other than US dollars carry the risk that such currencies will decline in value relative to the US dollar and affect the value of these investments held in the Portfolio. 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 securities markets of emerging market countries have historically been extremely volatile. However, the capital markets in the US and internationally have experienced unprecedented volatility in recent years, causing significant declines in the value and liquidity of many securities. 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. Derivatives Risk. Derivatives transactions, including those entered into for hedging purposes, may reduce returns or increase volatility, perhaps substantially. Forward currency contracts, swap agreements and over-the-counter options on securities (including options on ETFs) and currencies are subject to the risk of default by the counterparty and can be illiquid. Changes in liquidity may result in significant, rapid and unpredictable changes in the prices for derivatives. 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, interest rate or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Successful use of derivatives is subject to the Investment Manager’s ability to predict correctly movements in the direction of the relevant reference asset or market. Use of derivatives transactions may cause the Portfolio to experience significant losses. 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 debt securities offerings of emerging markets issuers may be relatively smaller in size than debt 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. Non-Diversification Risk. Because the Portfolio may invest in a smaller number of issuers than other, more diversified investment portfolios, the Portfolio’s net asset value (“NAV”) may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers. 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 brokerage costs and an increase in taxable capital gains distributions to the Portfolio’s shareholders. falsefalsefalsenonnum:textBlockItemTypenaNarrative 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 -Subparagraph i -Clause instruction false0Risk Narrative [Text Block]20false 4rr_BarChartAndPerformanceTableHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Performance Bar Chart and Tablefalsefalsefalsexbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 false0Bar Chart and Performance Table [Heading]21false 4rr_PerformanceNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Because the Portfolio has not commenced investment operations prior to the date of this Prospectus, no performance returns are presented. Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year. Comparison of Portfolio performance to an appropriate index indicates how the Portfolio’s average annual returns compare with those of a broad measure of market performance. After the Portfolio commences investment operations, performance information will be available at www.LazardNet.com or by calling (800) 823-6300. 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Lazard Explorer Total Return Portfolio

Lazard Explorer Total Return Portfolio

Investment Objective

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

Fees and Expenses

This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio, a series of The Lazard Funds, Inc. (the “Fund”).

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard Explorer Total Return Portfolio

Institutional Shares

Open Shares

Shareholder Transaction Fees (fees paid directly from your investment) Maximum Redemption Fee (as a % of amount redeemed, on shares owned for 30 days or less) 1.00% 1.00%

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Lazard Explorer Total Return Portfolio

Institutional Shares

Open Shares

Management Fees 1.00% 1.00%

Distribution and Service (12b-1) Fees none 0.25%

Other Expenses ^[1] 0.30% 0.35%

Total Annual Portfolio Operating Expenses 1.30% 1.60%

[1] "Other Expenses" are based on estimated amounts for the current fiscal year.

Example

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 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. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Lazard Explorer Total Return Portfolio (USD $)

1 Year

3 Years

Institutional Shares
132 412

Open Shares
163 505

Portfolio Turnover

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. Because the Portfolio had not commenced investment operations prior to the date of this Prospectus, no portfolio turnover information is presented.

Principal Investment Strategies

The Portfolio utilizes a flexible total return investment strategy. It typically invests primarily in debt securities issued or guaranteed by governments, government agencies or supranational bodies, forward contracts, including non-deliverable forward contracts, credit default swap agreements (on an index or basket of securities or a single security), interest rate swap agreements and foreign currency options, debt securities issued by companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds; short- and medium-term obligations and other fixed-income obligations. The Portfolio may also invest in certain other types of securities, such as convertible securities, commercial paper, and collateralized debt obligations. At certain times, based on the currently existing market environment, Lazard Asset Management LLC (the “Investment Manager”) may not believe it is able to find sufficient opportunities to invest in these types of securities and may determine to tactically shift the Portfolio to invest substantially in money market instruments, such as short-term US Treasury securities and certificates of deposit. The securities in which the Portfolio invests may be denominated in any currency.

The Portfolio typically focuses its investments in securities of that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the Morgan Stanley Capital International (“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 is not limited to securities of any particular quality or investment grade and, as a result, the Portfolio may invest significantly in securities rated below investment grade (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 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 Investment Manager expects to actively increase and decrease the Portfolio’s exposures to emerging market securities and currencies, and to significantly utilize derivatives. The Portfolio expects to utilize the following types of derivatives: forward contracts (including non-deliverable forward contracts, which settle in cash based on the difference between the agreed upon contract price or rate and the prevailing spot price or rate on an agreed notional amount), credit default swap agreements (including credit default swap agreements on an index or basket of securities or a single security), interest rate swap agreements and foreign currency options. Derivative positions may represent a substantial investment exposure through the economic leverage embedded in these positions. Although the Portfolio does not have a history of operations, based on the portfolios of other clients of the Investment Manager managed in a strategy similar to that to be employed for the Portfolio, the aggregate notional amount of derivative positions may typically be expected to range from 20% to 70% of the Portfolio’s assets. The Investment Manager may change the Portfolio’s investment exposures frequently, and positions may be held for only a short period of time as the Investment Manager seeks to add value in different market environments in pursuit of the Portfolio’s total return objective. However, there is no guarantee that the Portfolio will achieve its investment objective, and an investment in the Portfolio involves a high degree of risk.

The Portfolio is classified as “non-diversified” under the Investment Company Act of 1940, as amended (the “1940 Act”), which means that it may invest a relatively high percentage of its assets in a limited number of issuers, when compared to a diversified fund.

Principal Investment Risks

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

Fixed-Income and Debt Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes 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 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.

Some debt securities may give the issuer the option to call, or redeem, the securities before their maturity. If securities held by the Portfolio are called during a time of declining interest rates (which is typically the case when issuers exercise options to call outstanding securities), the Portfolio may have to reinvest the proceeds in an investment offering a lower yield (and the Portfolio may not fully benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

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.

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 exposure to less developed or less efficient trading markets, political instability, a lack of company information, differing auditing and legal standards, and, potentially, less liquidity. In addition, investments denominated in currencies other than US dollars carry the risk that such currencies will decline in value relative to the US dollar and affect the value of these investments held in the Portfolio.

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 securities markets of emerging market countries have historically been extremely volatile. However, the capital markets in the US and internationally have experienced unprecedented volatility in recent years, causing significant declines in the value and liquidity of many securities. 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.

Derivatives Risk. Derivatives transactions, including those entered into for hedging purposes, may reduce returns or increase volatility, perhaps substantially. Forward currency contracts, swap agreements and over-the-counter options on securities (including options on ETFs) and currencies are subject to the risk of default by the counterparty and can be illiquid. Changes in liquidity may result in significant, rapid and unpredictable changes in the prices for derivatives. 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, interest rate or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Successful use of derivatives is subject to the Investment Manager’s ability to predict correctly movements in the direction of the relevant reference asset or market. Use of derivatives transactions may cause the Portfolio to experience significant losses.

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 debt securities offerings of emerging markets issuers may be relatively smaller in size than debt 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.

Non-Diversification Risk. Because the Portfolio may invest in a smaller number of issuers than other, more diversified investment portfolios, the Portfolio’s net asset value (“NAV”) may be more vulnerable to changes in the market value of a single issuer or group of issuers and may be relatively more susceptible to adverse effects from any single corporate, industry, economic, market, political or regulatory occurrence than if the Portfolio’s investments consisted of securities issued by a larger number of issuers.

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 brokerage costs and an increase in taxable capital gains distributions to the Portfolio’s shareholders.

Performance Bar Chart and Table

Because the Portfolio has not commenced investment operations prior to the date of this Prospectus, no performance returns are presented. Annual performance returns provide some indication of the risks of investing in the Portfolio by showing changes in performance from year to year. Comparison of Portfolio performance to an appropriate index indicates how the Portfolio’s average annual returns compare with those of a broad measure of market performance. After the Portfolio commences investment operations, performance information will be available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance is not necessarily an indication of how the Portfolio will perform in the future.

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Risk/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.

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Total 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."

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"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.

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"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.

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Principal 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.

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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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 9 false0Distribution and Service (12b-1) Fees 0rr_DistributionAndService12b1FeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00000.0000falsefalsefalse2truetruetrue0.00250.0025falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 9 false0Distribution and Service (12b-1) Fees3falseRowprimaryElement*5false 4rr_OtherExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph c -Clause i false0Other Expenses 0rr_OtherExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.01160.0116falsefalsefalse2truetruetrue0.37610.3761falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph c -Clause i false0Other Expenses4falseRowprimaryElement*6false 4rr_ExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph d false0Total Annual Portfolio Operating Expenses 0rr_ExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.01410.0141falsefalsefalse2truetruetrue0.38110.3811falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph d false0Total Annual Portfolio Operating Expenses5falseRowprimaryElement*7false 4rr_FeeWaiverOrReimbursementOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Fee Waiver and Expense Reimbursement 0rr_FeeWaiverOrReimbursementOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel[1]1truetruetrue0.01010.0101falsefalsefalse2truetruetrue0.37410.3741falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Fee Waiver and Expense Reimbursement6falseRowprimaryElement*8false 4rr_NetExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabelrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement 0rr_NetExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel[1]1truetruetrue0.00400.0040falsefalsefalse2truetruetrue0.00700.0070falsefalsefalserr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement1Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through June 28, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .40% and .70% of the average daily net assets of the Portfolio's Institutional Shares and Open 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 Fund's Board of Directors (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.falseAnnual Fund Operating Expenses Lazard US Short Duration Fixed Income PortfolioUnKnownUnKnownUnKnownUnKnownfalsefalsefalseSheet2661026018ColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000874964_S000031124MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsenonnum:textBlockItemTypenaContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No definition available.false0Annual Fund Operating Expenses [Table]9false 4rr_ExpenseExampleHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Examplefalsefalsefalsexbrli:stringItemTypestringHeading for Expense Example.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false0Expense Example [Heading]10false 4rr_ExpenseExampleNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 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 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 in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be: falsefalsefalsenonnum:textBlockItemTypenaThe 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 1 false0Expense Example Narrative [Text Block]11false 4rr_ExpenseExampleWithRedemptionTableTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://lazardnet.com/20130625/role/ScheduleExpenseExampleTransposed20007 column dei_LegalEntityAxis compact cik0000874964_S000031124Member row primary compact * ~falsefalse~ http://lazardnet.com/20130625/role/ScheduleExpenseExampleTransposed20007 column dei_LegalEntityAxis compact cik0000874964_S000031124Member row primary compact * ~truehttp://lazardnet.com/20130625/role/ScheduleExpenseExampleTransposed20007020007 - Schedule - Expense Example {Transposed}truefalsefalse1falseColumnprimaryElement*3false 4rr_ExpenseExampleYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false21 Year USDfalsefalse$2falseColumnprimaryElement*4false 4rr_ExpenseExampleYear03rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false23 Years USDfalsefalse$3falseColumnprimaryElement*5false 4rr_ExpenseExampleYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false25 Years USDfalsefalse$4falseColumnprimaryElement*6false 4rr_ExpenseExampleYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false210 Years USDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000874964_S000031124MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard US Short Duration Fixed Income Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000031124Memberdei_LegalEntityAxisexplicitMemberfalsefalseInstitutional Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000096533Memberrr_ProspectusShareClassAxisexplicitMemberLazard US Short Duration Fixed Income PortfolioInstitutional SharesusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170 0truefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue4141falsefalsefalse2truefalsetrue347347falsefalsefalse3truefalsetrue675675falsefalsefalse4truefalsetrue16031603falsefalsefalsenanafalse0Institutional Shares2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000874964_S000031124MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard US Short Duration Fixed Income Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000031124Memberdei_LegalEntityAxisexplicitMemberfalsefalseOpen Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000096534Memberrr_ProspectusShareClassAxisexplicitMemberLazard US Short Duration Fixed Income PortfolioOpen SharesusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170 0truefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue7272falsefalsefalse2truefalsetrue56075607falsefalsefalse3truefalsetrue80848084falsefalsefalse4truefalsetrue98219821falsefalsefalsenanafalse0Open SharesfalseExpense Example Lazard US Short Duration Fixed Income Portfolio (USD $)UnKnownUnKnownUnKnownUnKnownfalsefalsefalseSheet426442028ColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000874964_S000031124MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsenonnum:textBlockItemTypenaContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No definition available.false0Expense Example, With Redemption [Table]12false 4rr_PortfolioTurnoverHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Portfolio Turnoverfalsefalsefalsexbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 5 false0Portfolio Turnover [Heading]13false 4rr_PortfolioTurnoverTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 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 77% of the average value of its portfolio. falsefalsefalsenonnum:textBlockItemTypenaDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 3 false0Portfolio Turnover [Text Block]14false 4rr_StrategyHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Principal Investment Strategiesfalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false0Strategy [Heading]15false 4rr_StrategyNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Under normal circumstances, the Portfolio invests at least 80% of its assets in fixed-income securities of US issuers, including US government securities, corporate securities, mortgage-related and asset-backed securities, convertible securities, municipal securities, structured products, preferred stocks and inflation- indexed-securities. These securities may have any type of interest rate payment terms, including fixed rate, adjustable rate or zero coupon features. Under normal circumstances, the Portfolio’s investment portfolio can be expected to have an average effective duration of three years or less. 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 invests primarily in securities that are rated investment grade by one or more nationally recognized statistical rating organizations (or, if unrated, determined by the Investment Manager to be of comparable quality). Securities are evaluated based on their fundamental and structural characteristics. Valuation analysis is tailored to the specific asset class, but may include credit research and analysis of features such as prepayment or call options, maturity, duration and coupon. falsefalsefalsenonnum:textBlockItemTypenaPrincipal 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false0Strategy Narrative [Text Block]16false 4rr_RiskHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Principal Investment Risksfalsefalsefalsexbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 false0Risk [Heading]17false 4rr_RiskNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 The value of your investment in the Portfolio will fluctuate, which means you could lose money. 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. Fixed-Income Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes in interest rates (i.e., as interest rates go up, prices go down). Interest rate risk is usually greater for fixed-income securities with longer maturities or effective durations. Other risk factors could have an effect on the Portfolio’s performance, including: <table style="MARGIN-LEFT: 0pc; FONT-SIZE: 0.2mm" cellspacing="0" cellpadding="0"> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr> <td> </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> if an issuer fails to make timely interest or principal payments (known as credit risk) </td> </tr> <tr> <td> </td> </tr> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> if there is a decline, or a perceived decline, in the credit quality of a fixed income security (or any guarantor of payment on such security) the security’s value could fall, potentially lowering the Portfolio’s share price </td> </tr> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> during unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like </td> </tr> </table> Adjustable rate securities provide the Portfolio with a certain degree of protection against rises in interest rates, although the Portfolio will participate in any declines in interest rates as well. Certain adjustable rate securities, such as those with interest rates that fluctuate directly or indirectly based on multiples of a stated index, are designed to be highly sensitive to changes in interest rates and can subject the holders thereof to extreme reductions of yield and possibly loss of principal. Certain fixed-income securities may be issued at a discount from their face value (such as zero coupon securities) or purchased at a price less than their stated face amount or at a price less than their issue price plus the portion of “original issue discount” previously accrued thereon, i.e., purchased at a “market discount.” The amount of original issue discount and/or market discount on certain obligations may be significant, and accretion of market discount together with original issue discount will cause the Portfolio to realize income prior to the receipt of cash payments with respect to these securities. Mortgage-Related and Asset-Backed Securities Risk. Mortgage-related securities are complex instruments, subject to both credit and prepayment risk, and may be more volatile and less liquid, and more difficult to price accurately, than more traditional debt securities. Although payments relating to certain mortgage-related securities are guaranteed by a third party (such as a US Government agency or instrumentality with respect to government-related mortgage-backed securities) or otherwise similarly secured, the market value of the security, which may fluctuate, is not secured. Mortgage-related securities generally are subject to credit risks associated with the performance of the underlying mortgage properties. Prepayment risk can lead to fluctuations in value of the mortgage-related security which may be pronounced. As with other interest-bearing securities, the prices of certain mortgage-related securities are inversely affected by changes in interest rates. However, although the value of a mortgage-related security may decline when interest rates rise, the converse is not necessarily true, since during periods of declining interest rates the mortgages underlying the security are more likely to be prepaid. The risks of asset-backed securities are similar to those of mortgage-related securities. However, asset-backed securities present certain risks that are not presented by mortgage-related securities. Primarily, these securities may provide the Portfolio with a less effective security interest in the related collateral than do mortgage-related securities. Structured Products Risk. Structured notes and other structured products 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 products can have risks of both fixed-income securities and derivatives transactions. Derivatives transactions may reduce returns or increase volatility, perhaps substantially, and they are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related reference assets, markets or rates. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions. falsefalsefalsenonnum:textBlockItemTypenaNarrative 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 -Subparagraph i -Clause instruction false0Risk Narrative [Text Block]18false 4rr_BarChartAndPerformanceTableHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Performance Bar Chart and Table Total Returns for Institutional Shares As of 12/31falsefalsefalsexbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 false0Bar Chart and Performance Table [Heading]19false 4rr_PerformanceNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Short Duration Fixed Income Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to those of a broad measure of market performance. 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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. As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch 1-3 Year Treasury® Index to reflect its change from a municipal fund to its current investment strategy as of such date. falsefalsefalsenonnum:textBlockItemTypenaIf 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 should show the returns of an appropriate broad-based 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. 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Lazard US Corporate Income Portfolio

Lazard US Corporate Income Portfolio

Investment Objective

The Portfolio seeks maximum total return from a combination of capital appreciation and current income.

Fees and Expenses

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

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard US Corporate Income Portfolio

Institutional Shares

Open Shares

Maximum Redemption Fee (as a % of amount redeemed, on shares owned for 30 days or less) 1.00% 1.00%

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Lazard US Corporate Income Portfolio

Institutional Shares

Open Shares

Management Fees 0.55% 0.55%

Distribution and Service (12b-1) Fees none 0.25%

Other Expenses 0.16% 0.44%

Total Annual Portfolio Operating Expenses 0.71% 1.24%

Fee Waiver and Expense Reimbursement ^[1] 0.16% 0.39%

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement ^[1] 0.55% 0.85%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through June 28, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .55% and .85% of the average daily net assets of the Portfolio's Institutional Shares and Open 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.

Example

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 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 in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Lazard US Corporate Income Portfolio (USD $)

1 Year

3 Years

5 Years

10 Years

Institutional Shares
56 211 379 867

Open Shares
87 355 643 1,466

Portfolio Turnover

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 26% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Portfolio invests at least 80% of its assets in fixed-income securities issued by corporations or other non-governmental issuers similar to corporations, which securities are tied economically to the US. The Portfolio typically will invest a substantial portion of its assets, and may invest up to 100% of its assets, in securities rated, at the time of purchase, below investment grade by S&P or Moody’s and as low as C or Ca by S&P or Moody’s, respectively, or the unrated equivalent as determined by the Investment Manager (“junk bonds”); however, the Portfolio focuses such investments in below investment grade securities that may be considered “better quality” (i.e., rated B1 or higher by Moody’s, B+ or higher by S&P or the unrated equivalent as determined by the Investment Manager). The Portfolio may invest in dollar-denominated securities of non-US companies, including, to a limited extent, in emerging market companies.

Although the Portfolio may invest in fixed-income securities without regard to their maturity, the Portfolio’s average weighted maturity is expected to range between two and ten years.

Securities are evaluated based on their fundamental and structural characteristics. Valuation analysis is tailored to the specific asset class, but may include credit research, prepayment or call options, maturity, duration, coupon, currency and country risks. The Portfolio is constructed using a bottom-up discipline in which the Investment Manager follows a systematic process to seek out undervalued opportunities within each sector.

Principal Investment Risks

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

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.

Fixed-Income Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes in interest rates. Interest rate risk, the risk that securities will decline in value because of changes in market interest rates, is usually greater for fixed-income securities with longer maturities or effective durations. The Portfolio’s investments in lower-rated, higher-yielding bonds are subject to greater credit risk than its higher-rated investments. Junk bonds tend to be more volatile, less liquid and are considered speculative.

Other risk factors could have an effect on the Portfolio’s performance, including:

•

if an issuer fails to make timely interest or principal payments

•

if there is a decline, or a perceived decline, in the credit quality of a fixed-income security (or any guarantor of payment on such security) the security’s value could fall, potentially lowering the Portfolio’s share price

•

during unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like

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

Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Corporate Income 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 over the past 10 calendar years. 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.

Best Quarter:
6/30/09 13.08%

Worst Quarter:
12/31/08 -15.96%

Average Annual Total Returns (for the periods ended December 31, 2012)

After-tax returns for the Open Shares vary from those of Institutional Shares. 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. As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch BB-B US Cash Pay Non-Distressed High Yield^® Index instead of the Bank of America Merrill Lynch High Yield Master II® Index, to reflect the Portfolio’s focus on higher-yielding securities that may be considered “better quality.”

Average Annual Returns Lazard US Corporate Income Portfolio

1 Year

5 Years

10 Years

Life of Portfolio

Inception Date

Institutional Shares
12.02% 7.18% 8.67% 4.26% Jan. 02, 1998

Open Shares
11.89% 6.91% 8.39% 3.69% Feb. 24, 1998

After Taxes on Distributions Institutional Shares
9.45% 4.42% 5.79% 0.91%

After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares
7.74% 4.44% 5.73% 1.41%

Bank of America Merrill Lynch BB-B US Cash Pay Non-Distressed High Yield Index Institutional Shares Comparison (reflects no deduction for fees, expenses or taxes)
14.27% 7.78% 8.47% 6.84%

Bank of America Merrill Lynch BB-B US Cash Pay Non-Distressed High Yield Index Open Shares Comparison (reflects no deduction for fees, expenses or taxes)
14.27% 7.78% 8.47% 6.77%

Bank of America Merrill Lynch High Yield Master II Index Institutional Shares Comparison (reflects no deduction for fees, expenses or taxes)
15.58% 10.01% 10.39% 7.00%

Bank of America Merrill Lynch High Yield Master II Index Open Shares Comparison (reflects no deduction for fees, expenses or taxes)
15.58% 10.01% 10.39% 6.91%

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Distribution [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.

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Risk/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.

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Label Element Value

Risk/Return: rr_RiskReturnAbstract

Risk/Return [Heading] rr_RiskReturnHeading Lazard US Short Duration Fixed Income Portfolio

Objective [Heading] rr_ObjectiveHeading Investment Objective

Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Portfolio seeks total return and preservation of capital.

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.

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 2014-06-28

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 77% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 77.00%

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 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 in year one only. 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
Under normal circumstances, the Portfolio invests at least 80% of its assets in fixed-income securities of US issuers, including US government securities, corporate securities, mortgage-related and asset-backed securities, convertible securities, municipal securities, structured products, preferred stocks and inflation- indexed-securities. These securities may have any type of interest rate payment terms, including fixed rate, adjustable rate or zero coupon features. Under normal circumstances, the Portfolio’s investment portfolio can be expected to have an average effective duration of three years or less. 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 invests primarily in securities that are rated investment grade by one or more nationally recognized statistical rating organizations (or, if unrated, determined by the Investment Manager to be of comparable quality).

Securities are evaluated based on their fundamental and structural characteristics. Valuation analysis is tailored to the specific asset class, but may include credit research and analysis of features such as prepayment or call options, maturity, duration and coupon.

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.

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.

Fixed-Income Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes in interest rates (i.e., as interest rates go up, prices go down). Interest rate risk is usually greater for fixed-income securities with longer maturities or effective durations.

Other risk factors could have an effect on the Portfolio’s performance, including:

•

if an issuer fails to make timely interest or principal payments (known as credit risk)

•

if there is a decline, or a perceived decline, in the credit quality of a fixed income security (or any guarantor of payment on such security) the security’s value could fall, potentially lowering the Portfolio’s share price

•

during unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like

Adjustable rate securities provide the Portfolio with a certain degree of protection against rises in interest rates, although the Portfolio will participate in any declines in interest rates as well. Certain adjustable rate securities, such as those with interest rates that fluctuate directly or indirectly based on multiples of a stated index, are designed to be highly sensitive to changes in interest rates and can subject the holders thereof to extreme reductions of yield and possibly loss of principal. Certain fixed-income securities may be issued at a discount from their face value (such as zero coupon securities) or purchased at a price less than their stated face amount or at a price less than their issue price plus the portion of “original issue discount” previously accrued thereon, i.e., purchased at a “market discount.” The amount of original issue discount and/or market discount on certain obligations may be significant, and accretion of market discount together with original issue discount will cause the Portfolio to realize income prior to the receipt of cash payments with respect to these securities.

Mortgage-Related and Asset-Backed Securities Risk. Mortgage-related securities are complex instruments, subject to both credit and prepayment risk, and may be more volatile and less liquid, and more difficult to price accurately, than more traditional debt securities. Although payments relating to certain mortgage-related securities are guaranteed by a third party (such as a US Government agency or instrumentality with respect to government-related mortgage-backed securities) or otherwise similarly secured, the market value of the security, which may fluctuate, is not secured. Mortgage-related securities generally are subject to credit risks associated with the performance of the underlying mortgage properties. Prepayment risk can lead to fluctuations in value of the mortgage-related security which may be pronounced. As with other interest-bearing securities, the prices of certain mortgage-related securities are inversely affected by changes in interest rates. However, although the value of a mortgage-related security may decline when interest rates rise, the converse is not necessarily true, since during periods of declining interest rates the mortgages underlying the security are more likely to be prepaid.

The risks of asset-backed securities are similar to those of mortgage-related securities. However, asset-backed securities present certain risks that are not presented by mortgage-related securities. Primarily, these securities may provide the Portfolio with a less effective security interest in the related collateral than do mortgage-related securities.

Structured Products Risk. Structured notes and other structured products 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 products can have risks of both fixed-income securities and derivatives transactions. Derivatives transactions may reduce returns or increase volatility, perhaps substantially, and they are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related reference assets, markets or rates. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

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 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 US Short Duration Fixed Income Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to those of a broad measure of market performance. The bar chart shows the performance of the Portfolio’s Institutional Shares. 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 US Short Duration Fixed Income Portfolio by showing the Portfolio's performance for the first complete calendar year of operation compared to those 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:
6/30/12 1.22%

Worst Quarter:
12/31/12 -0.02%

Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:

Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2012

Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 1.22%

Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:

Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2012

Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (0.02%)

Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (for the periods ended December 31, 2012)

Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch 1-3 Year Treasury Index to reflect its change from a municipal fund to its current investment strategy as of such date.

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 Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns for the Open Shares vary from those of Institutional Shares. 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. As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch 1-3 Year Treasury^® Index to reflect its change from a municipal fund to its current investment strategy as of such date.

Bank of America Merrill Lynch 1-3 Year Treasury Index (reflects no deduction for fees, expenses or taxes)

Risk/Return: rr_RiskReturnAbstract

1 Year rr_AverageAnnualReturnYear01 0.43%

Life of Portfolio rr_AverageAnnualReturnSinceInception 1.07%

Bank of America Merrill Lynch 1-10 Year Municipal Bond® Index (reflects no deduction for fees, expenses or taxes)

Risk/Return: rr_RiskReturnAbstract

1 Year rr_AverageAnnualReturnYear01 2.98%

Life of Portfolio rr_AverageAnnualReturnSinceInception 4.92%

Institutional Shares

Risk/Return: rr_RiskReturnAbstract

Management Fees rr_ManagementFeesOverAssets 0.25%

Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none

Other Expenses rr_OtherExpensesOverAssets 1.16%

Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 1.41%

Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (1.01%) ^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 0.40% ^[1]

Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 41

Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 347

Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 675

Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,603

Annual Return 2012 rr_AnnualReturn2012 2.54%

1 Year rr_AverageAnnualReturnYear01 2.54%

Life of Portfolio rr_AverageAnnualReturnSinceInception 3.81%

Inception Date rr_AverageAnnualReturnInceptionDate Feb. 28, 2011

Institutional Shares | After Taxes on Distributions

Risk/Return: rr_RiskReturnAbstract

1 Year rr_AverageAnnualReturnYear01 1.93%

Life of Portfolio rr_AverageAnnualReturnSinceInception 3.10%

Institutional Shares | After Taxes on Distributions and Sale of Portfolio Shares

Risk/Return: rr_RiskReturnAbstract

1 Year rr_AverageAnnualReturnYear01 1.66%

Life of Portfolio rr_AverageAnnualReturnSinceInception 2.86%

Open Shares

Risk/Return: rr_RiskReturnAbstract

Management Fees rr_ManagementFeesOverAssets 0.25%

Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%

Other Expenses rr_OtherExpensesOverAssets 37.61%

Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 38.11%

Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (37.41%) ^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 0.70% ^[1]

Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 72

Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 5,607

Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 8,084

Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 9,821

1 Year rr_AverageAnnualReturnYear01 2.24%

Life of Portfolio rr_AverageAnnualReturnSinceInception 3.49%

Inception Date rr_AverageAnnualReturnInceptionDate Feb. 28, 2011

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through June 28, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .40% and .70% of the average daily net assets of the Portfolio's Institutional Shares and Open 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 Fund's Board of Directors (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.

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Distribution [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.

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Risk/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.

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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. 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.

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Total 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."

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XML 21 R7.htm IDEA: XBRL DOCUMENT v2.4.0.8

Lazard US Short Duration Fixed Income Portfolio

Lazard US Short Duration Fixed Income Portfolio

Investment Objective

The Portfolio seeks total return and preservation of capital.

Fees and Expenses

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

Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses Lazard US Short Duration Fixed Income Portfolio

Institutional Shares

Open Shares

Management Fees 0.25% 0.25%

Distribution and Service (12b-1) Fees none 0.25%

Other Expenses 1.16% 37.61%

Total Annual Portfolio Operating Expenses 1.41% 38.11%

Fee Waiver and Expense Reimbursement ^[1] 1.01% 37.41%

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement ^[1] 0.40% 0.70%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through June 28, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .40% and .70% of the average daily net assets of the Portfolio's Institutional Shares and Open 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 Fund's Board of Directors (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.

Example

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 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 in year one only. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example Lazard US Short Duration Fixed Income Portfolio (USD $)

1 Year

3 Years

5 Years

10 Years

Institutional Shares
41 347 675 1,603

Open Shares
72 5,607 8,084 9,821

Portfolio Turnover

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 77% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Portfolio invests at least 80% of its assets in fixed-income securities of US issuers, including US government securities, corporate securities, mortgage-related and asset-backed securities, convertible securities, municipal securities, structured products, preferred stocks and inflation- indexed-securities. These securities may have any type of interest rate payment terms, including fixed rate, adjustable rate or zero coupon features. Under normal circumstances, the Portfolio’s investment portfolio can be expected to have an average effective duration of three years or less. 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 invests primarily in securities that are rated investment grade by one or more nationally recognized statistical rating organizations (or, if unrated, determined by the Investment Manager to be of comparable quality).

Securities are evaluated based on their fundamental and structural characteristics. Valuation analysis is tailored to the specific asset class, but may include credit research and analysis of features such as prepayment or call options, maturity, duration and coupon.

Principal Investment Risks

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

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.

Fixed-Income Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes in interest rates (i.e., as interest rates go up, prices go down). Interest rate risk is usually greater for fixed-income securities with longer maturities or effective durations.

Other risk factors could have an effect on the Portfolio’s performance, including:

•

if an issuer fails to make timely interest or principal payments (known as credit risk)

•

if there is a decline, or a perceived decline, in the credit quality of a fixed income security (or any guarantor of payment on such security) the security’s value could fall, potentially lowering the Portfolio’s share price

•

during unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like

Adjustable rate securities provide the Portfolio with a certain degree of protection against rises in interest rates, although the Portfolio will participate in any declines in interest rates as well. Certain adjustable rate securities, such as those with interest rates that fluctuate directly or indirectly based on multiples of a stated index, are designed to be highly sensitive to changes in interest rates and can subject the holders thereof to extreme reductions of yield and possibly loss of principal. Certain fixed-income securities may be issued at a discount from their face value (such as zero coupon securities) or purchased at a price less than their stated face amount or at a price less than their issue price plus the portion of “original issue discount” previously accrued thereon, i.e., purchased at a “market discount.” The amount of original issue discount and/or market discount on certain obligations may be significant, and accretion of market discount together with original issue discount will cause the Portfolio to realize income prior to the receipt of cash payments with respect to these securities.

Mortgage-Related and Asset-Backed Securities Risk. Mortgage-related securities are complex instruments, subject to both credit and prepayment risk, and may be more volatile and less liquid, and more difficult to price accurately, than more traditional debt securities. Although payments relating to certain mortgage-related securities are guaranteed by a third party (such as a US Government agency or instrumentality with respect to government-related mortgage-backed securities) or otherwise similarly secured, the market value of the security, which may fluctuate, is not secured. Mortgage-related securities generally are subject to credit risks associated with the performance of the underlying mortgage properties. Prepayment risk can lead to fluctuations in value of the mortgage-related security which may be pronounced. As with other interest-bearing securities, the prices of certain mortgage-related securities are inversely affected by changes in interest rates. However, although the value of a mortgage-related security may decline when interest rates rise, the converse is not necessarily true, since during periods of declining interest rates the mortgages underlying the security are more likely to be prepaid.

The risks of asset-backed securities are similar to those of mortgage-related securities. However, asset-backed securities present certain risks that are not presented by mortgage-related securities. Primarily, these securities may provide the Portfolio with a less effective security interest in the related collateral than do mortgage-related securities.

Structured Products Risk. Structured notes and other structured products 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 products can have risks of both fixed-income securities and derivatives transactions. Derivatives transactions may reduce returns or increase volatility, perhaps substantially, and they are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related reference assets, markets or rates. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Performance Bar Chart and Table Total Returns for Institutional Shares As of 12/31

The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Short Duration Fixed Income Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to those of a broad measure of market performance. The bar chart shows the performance of the Portfolio’s Institutional Shares. 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.

Best Quarter:
6/30/12 1.22%

Worst Quarter:
12/31/12 -0.02%

Average Annual Total Returns (for the periods ended December 31, 2012)

After-tax returns for the Open Shares vary from those of Institutional Shares. 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. As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch 1-3 Year Treasury^® Index to reflect its change from a municipal fund to its current investment strategy as of such date.

Average Annual Returns Lazard US Short Duration Fixed Income Portfolio

1 Year

Life of Portfolio

Inception Date

Institutional Shares
2.54% 3.81% Feb. 28, 2011

Open Shares
2.24% 3.49% Feb. 28, 2011

After Taxes on Distributions Institutional Shares
1.93% 3.10%

After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares
1.66% 2.86%

Bank of America Merrill Lynch 1-3 Year Treasury Index (reflects no deduction for fees, expenses or taxes)
0.43% 1.07%

Bank of America Merrill Lynch 1-10 Year Municipal Bond® Index (reflects no deduction for fees, expenses or taxes)
2.98% 4.92%

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Distribution [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.

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Risk/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.

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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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a false0Objective [Heading]4false 4rr_ObjectivePrimaryTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 The Portfolio seeks maximum total return from a combination of capital appreciation and current income. falsefalsefalsenonnum:textBlockItemTypenaInvestment 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a false0Objective, Primary [Text Block]5false 4rr_ExpenseHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Fees and Expensesfalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 1 -Subparagraph d false0Expense [Heading]6false 4rr_ExpenseNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 This table describes the fees and expenses that you may pay if you buy and hold shares of the Portfolio. falsefalsefalsenonnum:textBlockItemTypenaThis 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 1 -Subparagraph b false0Expense Narrative [Text Block]7false 4rr_ShareholderFeesCaptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Shareholder Transaction Fees (fees paid directly from your investment)falsefalsefalsexbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 false0Shareholder Fees Caption [Text]8false 4rr_ShareholderFeesTableTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://lazardnet.com/20130625/role/ScheduleShareholderFees20012 column dei_LegalEntityAxis compact cik0000874964_S000010265Member row primary compact * ~falsefalse~ http://lazardnet.com/20130625/role/ScheduleShareholderFees20012 column dei_LegalEntityAxis compact cik0000874964_S000010265Member row primary compact * ~falsehttp://lazardnet.com/20130625/role/ScheduleShareholderFees20012020012 - Schedule - Shareholder Feestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000874964_S000010265MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard US Corporate Income Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000010265Memberdei_LegalEntityAxisexplicitMemberfalsefalseInstitutional Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000028363Memberrr_ProspectusShareClassAxisexplicitMemberLazard US Corporate Income PortfolioInstitutional SharespureStandardhttp://www.xbrl.org/2003/instancepurexbrli0Standard0 USDfalsefalseduration2012-12-31T00:00:002012-12-31T00:00:00$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000874964_S000010265MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard US Corporate Income Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000010265Memberdei_LegalEntityAxisexplicitMemberfalsefalseOpen Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000028362Memberrr_ProspectusShareClassAxisexplicitMemberLazard US Corporate Income PortfolioOpen SharespureStandardhttp://www.xbrl.org/2003/instancepurexbrli0Standard0 USDfalsefalseduration2012-12-31T00:00:002012-12-31T00:00:00$1falseRowprimaryElement*3false 4rr_RedemptionFeeOverRedemptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsetruenegatedTerseLabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 2 -Subparagraph b false0Maximum Redemption Fee (as a % of amount redeemed, on shares owned for 30 days or less) 0rr_RedemptionFeeOverRedemptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsetruenegatedTerseLabel1truetruetrue0.01000.0100falsefalsefalse2truetruetrue0.01000.0100falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 2 -Subparagraph b false0Maximum Redemption Fee (as a % of amount redeemed, on shares owned for 30 days or less)falseShareholder Fees Lazard US Corporate Income PortfolioUnKnownUnKnownUnKnownUnKnownfalsefalsefalseSheet21102108ColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000874964_S000010265MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsenonnum:textBlockItemTypenaContains a command for the SEC Viewer for the role corresponding to ShareholderFeesData.No definition available.false0Shareholder Fees [Table]9false 4rr_OperatingExpensesCaptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)falsefalsefalsexbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 7 false0Operating Expenses Caption [Text]10false 4rr_AnnualFundOperatingExpensesTableTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://lazardnet.com/20130625/role/ScheduleAnnualFundOperatingExpenses20013 column dei_LegalEntityAxis compact cik0000874964_S000010265Member row primary compact * ~falsefalse~ http://lazardnet.com/20130625/role/ScheduleAnnualFundOperatingExpenses20013 column dei_LegalEntityAxis compact cik0000874964_S000010265Member row primary compact * ~falsehttp://lazardnet.com/20130625/role/ScheduleAnnualFundOperatingExpenses20013020013 - Schedule - Annual Fund Operating Expensestruefalsefalse1falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000874964_S000010265MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard US Corporate Income Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000010265Memberdei_LegalEntityAxisexplicitMemberfalsefalseInstitutional Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000028363Memberrr_ProspectusShareClassAxisexplicitMemberLazard US Corporate Income PortfolioInstitutional SharespureStandardhttp://www.xbrl.org/2003/instancepurexbrli0Standard0 USDfalsefalseduration2012-12-31T00:00:002012-12-31T00:00:00$2falseColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000874964_S000010265MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard US Corporate Income Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000010265Memberdei_LegalEntityAxisexplicitMemberfalsefalseOpen Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000028362Memberrr_ProspectusShareClassAxisexplicitMemberLazard US Corporate Income PortfolioOpen SharespureStandardhttp://www.xbrl.org/2003/instancepurexbrli0Standard0 USDfalsefalseduration2012-12-31T00:00:002012-12-31T00:00:00$1falseRowprimaryElement*3false 4rr_ManagementFeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph a false0Management Fees 0rr_ManagementFeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00550.0055falsefalsefalse2truetruetrue0.00550.0055falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph a false0Management Fees2falseRowprimaryElement*4false 4rr_DistributionAndService12b1FeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 9 false0Distribution and Service (12b-1) Fees 0rr_DistributionAndService12b1FeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00000.0000falsefalsefalse2truetruetrue0.00250.0025falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 9 false0Distribution and Service (12b-1) Fees3falseRowprimaryElement*5false 4rr_OtherExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph c -Clause i false0Other Expenses 0rr_OtherExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00160.0016falsefalsefalse2truetruetrue0.00440.0044falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph c -Clause i false0Other Expenses4falseRowprimaryElement*6false 4rr_ExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph d false0Total Annual Portfolio Operating Expenses 0rr_ExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00710.0071falsefalsefalse2truetruetrue0.01240.0124falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph d false0Total Annual Portfolio Operating Expenses5falseRowprimaryElement*7false 4rr_FeeWaiverOrReimbursementOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Fee Waiver and Expense Reimbursement 0rr_FeeWaiverOrReimbursementOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsetruenegatedLabel[1]1truetruetrue0.00160.0016falsefalsefalse2truetruetrue0.00390.0039falsefalsefalserr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Fee Waiver and Expense Reimbursement6falseRowprimaryElement*8false 4rr_NetExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabelrr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement 0rr_NetExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel[1]1truetruetrue0.00550.0055falsefalsefalse2truetruetrue0.00850.0085falsefalsefalserr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false0Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement1Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through June 28, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .55% and .85% of the average daily net assets of the Portfolio's Institutional Shares and Open 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.falseAnnual Fund Operating Expenses Lazard US Corporate Income PortfolioUnKnownUnKnownUnKnownUnKnownfalsefalsefalseSheet2661026018ColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000874964_S000010265MemberColumnrr_ProspectusShareClassAxisAxis*ColumnunitUnit*RowprimaryElement*falsenonnum:textBlockItemTypenaContains a command for the SEC Viewer for the role corresponding to OperatingExpensesData.No definition available.false0Annual Fund Operating Expenses [Table]11false 4rr_ExpenseExampleHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Examplefalsefalsefalsexbrli:stringItemTypestringHeading for Expense Example.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false0Expense Example [Heading]12false 4rr_ExpenseExampleNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 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 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 in year one only. 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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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false21 Year USDfalsefalse$2falseColumnprimaryElement*4false 4rr_ExpenseExampleYear03rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false23 Years USDfalsefalse$3falseColumnprimaryElement*5false 4rr_ExpenseExampleYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false25 Years USDfalsefalse$4falseColumnprimaryElement*6false 4rr_ExpenseExampleYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabelrr: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false210 Years USDfalsefalse$1falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000874964_S000010265MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard US Corporate Income Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000010265Memberdei_LegalEntityAxisexplicitMemberfalsefalseInstitutional Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000028363Memberrr_ProspectusShareClassAxisexplicitMemberLazard US Corporate Income PortfolioInstitutional SharesusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170 0truefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue5656falsefalsefalse2truefalsetrue211211falsefalsefalse3truefalsetrue379379falsefalsefalse4truefalsetrue867867falsefalsefalsenanafalse0Institutional Shares2falseRowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000874964_S000010265MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseLazard US Corporate Income Portfoliodei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_S000010265Memberdei_LegalEntityAxisexplicitMemberfalsefalseOpen Sharesrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldicik0000874964_C000028362Memberrr_ProspectusShareClassAxisexplicitMemberLazard US Corporate Income PortfolioOpen SharesusdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170 0truefalsefalsefalsefalsefalsefalsefalsefalse1truefalsetrue8787falsefalsefalse2truefalsetrue355355falsefalsefalse3truefalsetrue643643falsefalsefalse4truefalsetrue14661466falsefalsefalsenanafalse0Open SharesfalseExpense Example Lazard US Corporate Income Portfolio (USD $)UnKnownUnKnownUnKnownUnKnownfalsefalsefalseSheet426442028ColumnprimaryElement*RowperiodPeriod*Rowdei_LegalEntityAxisAxiscik0000874964_S000010265MemberRowrr_ProspectusShareClassAxisAxis*RowunitUnit*falsenonnum:textBlockItemTypenaContains a command for the SEC Viewer for the role corresponding to ExpenseExample.No definition available.false0Expense Example, With Redemption [Table]14false 4rr_PortfolioTurnoverHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Portfolio Turnoverfalsefalsefalsexbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 5 false0Portfolio Turnover [Heading]15false 4rr_PortfolioTurnoverTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 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 26% of the average value of its portfolio. falsefalsefalsenonnum:textBlockItemTypenaDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 3 false0Portfolio Turnover [Text Block]16false 4rr_StrategyHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Principal Investment Strategiesfalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false0Strategy [Heading]17false 4rr_StrategyNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 Under normal circumstances, the Portfolio invests at least 80% of its assets in fixed-income securities issued by corporations or other non-governmental issuers similar to corporations, which securities are tied economically to the US. The Portfolio typically will invest a substantial portion of its assets, and may invest up to 100% of its assets, in securities rated, at the time of purchase, below investment grade by S&P or Moody’s and as low as C or Ca by S&P or Moody’s, respectively, or the unrated equivalent as determined by the Investment Manager (“junk bonds”); however, the Portfolio focuses such investments in below investment grade securities that may be considered “better quality” (i.e., rated B1 or higher by Moody’s, B+ or higher by S&P or the unrated equivalent as determined by the Investment Manager). The Portfolio may invest in dollar-denominated securities of non-US companies, including, to a limited extent, in emerging market companies. Although the Portfolio may invest in fixed-income securities without regard to their maturity, the Portfolio’s average weighted maturity is expected to range between two and ten years. Securities are evaluated based on their fundamental and structural characteristics. Valuation analysis is tailored to the specific asset class, but may include credit research, prepayment or call options, maturity, duration, coupon, currency and country risks. The Portfolio is constructed using a bottom-up discipline in which the Investment Manager follows a systematic process to seek out undervalued opportunities within each sector. falsefalsefalsenonnum:textBlockItemTypenaPrincipal 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false0Strategy Narrative [Text Block]18false 4rr_RiskHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Principal Investment Risksfalsefalsefalsexbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 false0Risk [Heading]19false 4rr_RiskNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 The value of your investment in the Portfolio will fluctuate, which means you could lose money. 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. Fixed-Income Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes in interest rates. Interest rate risk, the risk that securities will decline in value because of changes in market interest rates, is usually greater for fixed-income securities with longer maturities or effective durations. The Portfolio’s investments in lower-rated, higher-yielding bonds are subject to greater credit risk than its higher-rated investments. Junk bonds tend to be more volatile, less liquid and are considered speculative. Other risk factors could have an effect on the Portfolio’s performance, including: <table style="MARGIN-LEFT: 0pc; FONT-SIZE: 0.2mm" cellspacing="0" cellpadding="0"> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> if an issuer fails to make timely interest or principal payments </td> </tr> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> if there is a decline, or a perceived decline, in the credit quality of a fixed-income security (or any guarantor of payment on such security) the security’s value could fall, potentially lowering the Portfolio’s share price </td> </tr> <tr valign="top"> <td style="WIDTH: 4pt">   </td> </tr> <tr valign="top"> <td align="right"> • </td> <td width="3">   </td> <td>   </td> <td width="3">   </td> <td colspan="17"> during unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like </td> </tr> </table> Non-US Company Securities Risk. The Portfolio’s performance will be influenced by political, social and economic factors affecting the non-US companies in which the Portfolio invests. Investments in securities of non-US companies carry special country-related risks, such as political instability, a lack of company information, differing auditing and legal standards, and, potentially, less liquidity. 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. falsefalsefalsenonnum:textBlockItemTypenaNarrative 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 -Subparagraph i -Clause instruction false0Risk Narrative [Text Block]20false 4rr_BarChartAndPerformanceTableHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Performance Bar Chart and Table Year-by-Year Total Returns for Institutional Shares As of 12/31falsefalsefalsexbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 false0Bar Chart and Performance Table [Heading]21false 4rr_PerformanceNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Corporate Income 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 over the past 10 calendar years. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. 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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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false0Annual Return 2003 4rr_AnnualReturn2003rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalsexbrli: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. 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The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false0Annual Return 2004 0rr_AnnualReturn2004rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.09880.0988falsefalsefalsexbrli: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. 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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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 2006 4rr_AnnualReturn2006rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 2006 0rr_AnnualReturn2006rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.09710.0971falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 20065falseRowprimaryElement*7false7false 4rr_AnnualReturn2007rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.03630.0363falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false0Annual Return 2007 4rr_AnnualReturn2007rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false0Annual Return 2007 0rr_AnnualReturn2007rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.03630.0363falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false0Annual Return 20076falseRowprimaryElement*8false8false 4rr_AnnualReturn2008rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2024-0.2024falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 2008 4rr_AnnualReturn2008rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 2008 0rr_AnnualReturn2008rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse-0.2024-0.2024falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 20087falseRowprimaryElement*9false9false 4rr_AnnualReturn2009rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.34660.3466falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false0Annual Return 2009 4rr_AnnualReturn2009rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false0Annual Return 2009 0rr_AnnualReturn2009rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.34660.3466falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false0Annual Return 20098falseRowprimaryElement*10false10false 4rr_AnnualReturn2010rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.11780.1178falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 2010 4rr_AnnualReturn2010rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 2010 0rr_AnnualReturn2010rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.11780.1178falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 20109falseRowprimaryElement*11false11false 4rr_AnnualReturn2011rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.05170.0517falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false0Annual Return 2011 4rr_AnnualReturn2011rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false0Annual Return 2011 0rr_AnnualReturn2011rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.05170.0517falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false0Annual Return 201110falseRowprimaryElement*12false12false 4rr_AnnualReturn2012rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.12020.1202falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 2012 4rr_AnnualReturn2012rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 2012 0rr_AnnualReturn2012rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1truetruefalse0.12020.1202falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Annual Return 2012falseAnnual Total Returns [Bar Chart] UnKnownUnKnownUnKnownUnKnownfalsefalsefalseSheet11009110014ColumnperiodPeriod*Columndei_LegalEntityAxisAxiscik0000874964_S000010265MemberColumnrr_ProspectusShareClassAxisAxiscik0000874964_C000028363MemberColumnunitUnit*RowprimaryElement*falsenonnum:textBlockItemTypenaContains a command for the SEC Viewer for the role corresponding to BarChartData.No definition available.false0Bar Chart [Table]23false 4rr_BarChartClosingTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00<table cellspacing="0" style="width: 100%; margin-left: 0%; margin-right: 0%;"> <tr valign="top"> <td> </td> <td> Best Quarter: 6/30/09 13.08% Worst Quarter: 12/31/08 -15.96% </td> </tr> </table>falsefalsefalsenonnum:textBlockItemTypenaIf 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false0Bar Chart Closing [Text Block]24false 4rr_PerformanceTableHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00Average Annual Total Returns (for the periods ended December 31, 2012) falsefalsefalsexbrli: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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit c false0Performance Table Heading25false 4rr_PerformanceTableNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00 After-tax returns for the Open Shares vary from those of Institutional Shares. 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. As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch BB-B US Cash Pay Non-Distressed High Yield® Index instead of the Bank of America Merrill Lynch High Yield Master II® Index, to reflect the Portfolio’s focus on higher-yielding securities that may be considered “better quality.” falsefalsefalsenonnum:textBlockItemTypenaIf 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 should show the returns of an appropriate broad-based 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: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iv false0Performance Table Narrative26false 4rr_PerformanceTableTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00~ http://lazardnet.com/20130625/role/ScheduleAverageAnnualReturnsTransposed20016 column dei_LegalEntityAxis compact cik0000874964_S000010265Member column rr_PerformanceMeasureAxis compact * row primary compact * ~falsefalse~ 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Label Element Value

Risk/Return: rr_RiskReturnAbstract

Risk/Return [Heading] rr_RiskReturnHeading Lazard US Corporate Income Portfolio

Objective [Heading] rr_ObjectiveHeading Investment Objective

Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock
The Portfolio seeks maximum total return from a combination of capital appreciation and current income.

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 Transaction 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 2014-06-28

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 26% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 26.00%

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 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 in year one only. 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
Under normal circumstances, the Portfolio invests at least 80% of its assets in fixed-income securities issued by corporations or other non-governmental issuers similar to corporations, which securities are tied economically to the US. The Portfolio typically will invest a substantial portion of its assets, and may invest up to 100% of its assets, in securities rated, at the time of purchase, below investment grade by S&P or Moody’s and as low as C or Ca by S&P or Moody’s, respectively, or the unrated equivalent as determined by the Investment Manager (“junk bonds”); however, the Portfolio focuses such investments in below investment grade securities that may be considered “better quality” (i.e., rated B1 or higher by Moody’s, B+ or higher by S&P or the unrated equivalent as determined by the Investment Manager). The Portfolio may invest in dollar-denominated securities of non-US companies, including, to a limited extent, in emerging market companies.

Although the Portfolio may invest in fixed-income securities without regard to their maturity, the Portfolio’s average weighted maturity is expected to range between two and ten years.

Securities are evaluated based on their fundamental and structural characteristics. Valuation analysis is tailored to the specific asset class, but may include credit research, prepayment or call options, maturity, duration, coupon, currency and country risks. The Portfolio is constructed using a bottom-up discipline in which the Investment Manager follows a systematic process to seek out undervalued opportunities within each sector.

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.

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.

Fixed-Income Securities Risk. While fixed-income securities are designed to produce a stable stream of income, their prices move inversely with changes in interest rates. Interest rate risk, the risk that securities will decline in value because of changes in market interest rates, is usually greater for fixed-income securities with longer maturities or effective durations. The Portfolio’s investments in lower-rated, higher-yielding bonds are subject to greater credit risk than its higher-rated investments. Junk bonds tend to be more volatile, less liquid and are considered speculative.

Other risk factors could have an effect on the Portfolio’s performance, including:

•

if an issuer fails to make timely interest or principal payments

•

if there is a decline, or a perceived decline, in the credit quality of a fixed-income security (or any guarantor of payment on such security) the security’s value could fall, potentially lowering the Portfolio’s share price

•

during unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like

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

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 US Corporate Income 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 over the past 10 calendar years. 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 US Corporate Income 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:
6/30/09 13.08%

Worst Quarter:
12/31/08 -15.96%

Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter:

Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009

Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 13.08%

Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter:

Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008

Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (15.96%)

Performance Table Heading rr_PerformanceTableHeading Average Annual Total Returns (for the periods ended December 31, 2012)

Performance Table Market Index Changed rr_PerformanceTableMarketIndexChanged As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch BB-B US Cash Pay Non-Distressed High Yield Index instead of the Bank of America Merrill Lynch High Yield Master II Index, to reflect the Portfolio's focus on higher-yielding securities that may be considered "better quality."

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 Narrative rr_PerformanceTableNarrativeTextBlock
After-tax returns for the Open Shares vary from those of Institutional Shares. 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. As of June 28, 2013, the Portfolio compares its performance to the Bank of America Merrill Lynch BB-B US Cash Pay Non-Distressed High Yield^® Index instead of the Bank of America Merrill Lynch High Yield Master II® Index, to reflect the Portfolio’s focus on higher-yielding securities that may be considered “better quality.”

Bank of America Merrill Lynch BB-B US Cash Pay Non-Distressed High Yield Index Institutional Shares Comparison (reflects no deduction for fees, expenses or taxes)

Risk/Return: rr_RiskReturnAbstract

1 Year rr_AverageAnnualReturnYear01 14.27%

5 Years rr_AverageAnnualReturnYear05 7.78%

10 Years rr_AverageAnnualReturnYear10 8.47%

Life of Portfolio rr_AverageAnnualReturnSinceInception 6.84%

Bank of America Merrill Lynch BB-B US Cash Pay Non-Distressed High Yield Index Open Shares Comparison (reflects no deduction for fees, expenses or taxes)

Risk/Return: rr_RiskReturnAbstract

1 Year rr_AverageAnnualReturnYear01 14.27%

5 Years rr_AverageAnnualReturnYear05 7.78%

10 Years rr_AverageAnnualReturnYear10 8.47%

Life of Portfolio rr_AverageAnnualReturnSinceInception 6.77%

Bank of America Merrill Lynch High Yield Master II Index Institutional Shares Comparison (reflects no deduction for fees, expenses or taxes)

Risk/Return: rr_RiskReturnAbstract

1 Year rr_AverageAnnualReturnYear01 15.58%

5 Years rr_AverageAnnualReturnYear05 10.01%

10 Years rr_AverageAnnualReturnYear10 10.39%

Life of Portfolio rr_AverageAnnualReturnSinceInception 7.00%

Bank of America Merrill Lynch High Yield Master II Index Open Shares Comparison (reflects no deduction for fees, expenses or taxes)

Risk/Return: rr_RiskReturnAbstract

1 Year rr_AverageAnnualReturnYear01 15.58%

5 Years rr_AverageAnnualReturnYear05 10.01%

10 Years rr_AverageAnnualReturnYear10 10.39%

Life of Portfolio rr_AverageAnnualReturnSinceInception 6.91%

Institutional Shares

Risk/Return: rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (1.00%)

Management Fees rr_ManagementFeesOverAssets 0.55%

Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none

Other Expenses rr_OtherExpensesOverAssets 0.16%

Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 0.71%

Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.16%) ^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 0.55% ^[1]

Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 56

Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 211

Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 379

Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 867

Annual Return 2003 rr_AnnualReturn2003 24.58%

Annual Return 2004 rr_AnnualReturn2004 9.88%

Annual Return 2005 rr_AnnualReturn2005 4.33%

Annual Return 2006 rr_AnnualReturn2006 9.71%

Annual Return 2007 rr_AnnualReturn2007 3.63%

Annual Return 2008 rr_AnnualReturn2008 (20.24%)

Annual Return 2009 rr_AnnualReturn2009 34.66%

Annual Return 2010 rr_AnnualReturn2010 11.78%

Annual Return 2011 rr_AnnualReturn2011 5.17%

Annual Return 2012 rr_AnnualReturn2012 12.02%

1 Year rr_AverageAnnualReturnYear01 12.02%

5 Years rr_AverageAnnualReturnYear05 7.18%

10 Years rr_AverageAnnualReturnYear10 8.67%

Life of Portfolio rr_AverageAnnualReturnSinceInception 4.26%

Inception Date rr_AverageAnnualReturnInceptionDate Jan. 02, 1998

Institutional Shares | After Taxes on Distributions

Risk/Return: rr_RiskReturnAbstract

1 Year rr_AverageAnnualReturnYear01 9.45%

5 Years rr_AverageAnnualReturnYear05 4.42%

10 Years rr_AverageAnnualReturnYear10 5.79%

Life of Portfolio rr_AverageAnnualReturnSinceInception 0.91%

Institutional Shares | After Taxes on Distributions and Sale of Portfolio Shares

Risk/Return: rr_RiskReturnAbstract

1 Year rr_AverageAnnualReturnYear01 7.74%

5 Years rr_AverageAnnualReturnYear05 4.44%

10 Years rr_AverageAnnualReturnYear10 5.73%

Life of Portfolio rr_AverageAnnualReturnSinceInception 1.41%

Open Shares

Risk/Return: rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (1.00%)

Management Fees rr_ManagementFeesOverAssets 0.55%

Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%

Other Expenses rr_OtherExpensesOverAssets 0.44%

Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 1.24%

Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.39%) ^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement rr_NetExpensesOverAssets 0.85% ^[1]

Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 87

Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 355

Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 643

Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,466

1 Year rr_AverageAnnualReturnYear01 11.89%

5 Years rr_AverageAnnualReturnYear05 6.91%

10 Years rr_AverageAnnualReturnYear10 8.39%

Life of Portfolio rr_AverageAnnualReturnSinceInception 3.69%

Inception Date rr_AverageAnnualReturnInceptionDate Feb. 24, 1998

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through June 28, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .55% and .85% of the average daily net assets of the Portfolio's Institutional Shares and Open 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.

X

- Definition

If 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).

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Return Before Taxes.

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Risk/Return Bar Chart and Table.

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Risk/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.

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Total 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."

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If 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.

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If 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.

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Management 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."

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Total Annual Fund Operating Expenses.

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Investment 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).

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Investment 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).

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Annual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)

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"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.

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If applicable, include a statement explaining that updated performance information is available and providing a Website address and/or toll-free (or collect) telephone number where the updated information may be obtained.

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Risk/Return Bar Chart and Table.

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Include the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.

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This 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.

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If the Fund selects an index that is different from the index used in a table for the immediately preceding period, explain the reason(s) for the selection of a different index and provide information for both the newly selected and the former index.

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If 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 should show the returns of an appropriate broad-based 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).

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Provide a brief explanation that the actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.

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Provide a brief explanation that after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.

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Disclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.

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Disclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.

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"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.

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Narrative Risk Disclosure.

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Summarize the principal risks of investing in the Fund, including the risks to which the Fund's portfolio as a whole is subject and the circumstances reasonably likely to affect adversely the Fund's net asset value, yield, and total return. Unless the Fund is a Money Market Fund, disclose that loss of money is a risk of investing in the Fund. 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.

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Narrative 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.

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Risk/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 indicated

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Shareholder Fees (fees paid directly from your investment).

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Principal 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.

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Principal 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.

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The date of the prospectus.

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Document and Entity Information
0 Months Ended

Dec. 31, 2012

Risk/Return:

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Document Period End Date Dec. 31, 2012

Registrant Name LAZARD FUNDS INC

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Document Creation Date Jun. 25, 2013

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Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Prospectus Date	rr_ProspectusDate	Jun. 28, 2013

Document and Entity Information	0 Months Ended
Document and Entity Information	Dec. 31, 2012
Risk/Return:
Document Type	485BPOS
Document Period End Date	Dec. 31, 2012
Registrant Name	LAZARD FUNDS INC
Central Index Key	0000874964
Amendment Flag	false
Document Creation Date	Jun. 25, 2013
Document Effective Date	Jun. 28, 2013
Prospectus Date	Jun. 28, 2013