485BPOS

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. 73	/X/
and
REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940	/X/
Amendment No. 73	/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 22nd day of May, 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	May 22, 2013
/s/ Stephen St. Clair Stephen St. Clair	Treasurer and Chief Financial Officer	May 22, 2013
/s/ Ashish Bhutani Ashish Bhutani	Director	May 22, 2013
/s/ Kenneth S. Davidson* Kenneth S. Davidson	Director	May 22, 2013
/s/ Nancy A. Eckl* Nancy A. Eckl	Director	May 22, 2013
/s/ Lester Z. Lieberman* Lester Z. Lieberman	Director	May 22, 2013
/s/ Leon M. Pollack* Leon M. Pollack	Director	May 22, 2013
/s/ Richard Reiss, Jr.* Richard Reiss, Jr.	Director	May 22, 2013
/s/ Robert M. Solmson* Robert M. Solmson	Director	May 22, 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

XML

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Prospectus Date	rr_ProspectusDate	May 01, 2013

XML

Lazard U.S. High Yield Portfolio

Lazard U.S. High Yield 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 U.S. High Yield 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 U.S. High Yield 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%

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 U.S. High Yield 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

The Portfolio invests primarily in high-yielding US corporate fixed-income securities which, at the time of purchase, are rated below investment grade (lower than Baa by Moody’s or lower than BBB by S&P (“junk bonds”)). The Portfolio may invest in securities of non-US companies, including, to a limited extent, in companies in, or governments of, emerging market countries.

Under normal circumstances, the Portfolio invests at least 80% of its assets in bonds and other fixed-income securities of US companies rated, at the time of purchase, below investment grade by S&P or Moody’s and as low as the lowest rating assigned by S&P or Moody’s, or the unrated equivalent as determined by the Investment Manager. The Portfolio focuses its investments in high-yielding securities that may be considered “better quality” (B+ or higher by Moody’s or S&P or the unrated equivalent as determined by the Investment Manager). 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 in the credit quality of a bond, 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 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 currency fluctuations, 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.

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 High Yield 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.

Average Annual Returns Lazard U.S. High Yield 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 High Yield Master II® Index (reflects no deduction for fees, expenses or taxes) (Institutional)	15.58%	10.01%	10.39%	7.00%
Bank of America Merrill Lynch High Yield Master II® Index (reflects no deduction for fees, expenses or taxes) (Open)	15.58%	10.01%	10.39%	6.91%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 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.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Developing Markets Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 61% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

61.00%

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. 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 invests primarily in equity securities, principally common stocks, of non-US companies whose principal activities are located in emerging market countries (also known as “developing markets”).

Emerging market countries include all countries represented by the MSCI Emerging Markets Index, which currently includes: Brazil, Chile, China, Colombia, Czech Republic, Egypt, Hungary, India, Indonesia, Korea, Malaysia, Mexico, Morocco, Peru, Philippines, Poland, Russia, South Africa, Taiwan, Thailand and Turkey.

The Investment Manager employs a relative growth investment philosophy that is based on value creation through the process of bottom-up stock selection. The Investment Manager’s approach consists of an analytical framework, accounting validation, fundamental analysis and portfolio construction parameters. The Investment Manager’s selection process focuses on growth and considers the sustainability of growth and the trade off between valuation and growth.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies whose principal business activities are located in emerging market countries.

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.

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 currency fluctuations, 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.

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

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 Developing Markets Equity 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 varied from year to year. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Developing Markets Equity 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 56.64%

Worst Quarter:
9/30/11 -28.53%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

56.64%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(28.53%)

Performance Table Heading

rr_PerformanceTableHeading

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

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.

MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

18.22%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

9.69%

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

0.21%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.21%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

123

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

384

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

665

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,466

Annual Return 2009

rr_AnnualReturn2009

108.53%

Annual Return 2010

rr_AnnualReturn2010

28.62%

Annual Return 2011

rr_AnnualReturn2011

(26.15%)

Annual Return 2012

rr_AnnualReturn2012

17.16%

1 Year

rr_AverageAnnualReturnYear01

17.16%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.33%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 30, 2008

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.13%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

8.89%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.48%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

8.28%

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

0.28%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.53%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

156

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

483

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

834

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,824

1 Year

rr_AverageAnnualReturnYear01

16.79%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.02%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 30, 2008

XML

Lazard Emerging Markets Equity Blend Portfolio

Lazard Emerging Markets Equity Blend Portfolio

Investment Objective

The Portfolio seeks long-term 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard Emerging Markets Equity Blend 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 Emerging Markets Equity Blend Portfolio		Institutional Shares	Open Shares
Management Fees		1.00%	1.00%
Distribution and Service (12b-1) Fees		none	0.25%
Other Expenses		0.34%	0.52%
Total Annual Portfolio Operating Expenses		1.34%	1.77%
Fee Waiver and Expense Reimbursement	[1]	0.04%	0.17%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	1.30%	1.60%

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 Emerging Markets Equity Blend Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	132	421	730	1,609
Open Shares	163	541	943	2,070

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 57% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, including common stocks, ADRs and GDRs, of non-US companies whose principal activities are located in emerging market countries.

Emerging market countries include all countries represented by the MSCI Emerging Markets Index, which currently includes: Brazil, Chile, China, Colombia, Czech Republic, Egypt, Hungary, India, Indonesia, Korea, Malaysia, Mexico, Morocco, Peru, Philippines, Poland, Russia, South Africa, Taiwan, Thailand and Turkey.

The Investment Manager allocates the Portfolio’s assets between versions of the Investment Manager’s emerging markets relative value and relative growth investment strategies. In the emerging markets relative value strategy, assets are invested in companies that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. In the emerging markets relative growth strategy, the Investment Manager employs a relative growth investment philosophy that is based on value creation through the process of bottom-up stock selection. The Investment Manager’s approach consists of an analytical framework, accounting validation, fundamental analysis and portfolio construction parameters. The Investment Manager’s selection process focuses on growth and considers the sustainability of growth and the trade off between valuation and growth. A premium may be paid for higher, sustainable growth. The Portfolio may invest in companies of any size or market capitalization.

The Investment Manager currently intends to maintain an allocation of approximately 40%-60% of the Portfolio’s assets in each strategy, but the allocation ranges could change in the future without prior notice to shareholders. The Investment Manager will make allocation decisions between the strategies based on quantitative and qualitative analysis through proprietary software models. Quantitative analysis includes, among others, statistical analysis of portfolio risks, factor dependencies and trading tendencies. Qualitative analysis includes, among others, analysis of the global economic environment as well as internal and external research on individual securities, portfolio holdings, attribution factors, behavioral patterns and overall market views and scenarios. The Investment Manager will periodically review the allocation of Portfolio assets between the strategies and modify the relative weightings to emphasize risk or to seek to mitigate risk exposures.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies whose principal business activities are located in emerging market countries.

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.

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 currency fluctuations, 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.

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

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

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

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

Best Quarter:
3/31/12 17.59%

Worst Quarter:
9/30/11 -24.35%

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.

Average Annual Returns Lazard Emerging Markets Equity Blend Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	18.19%	6.32%	May 28, 2010
Open Shares	17.97%	6.02%	May 28, 2010
After Taxes on Distributions Institutional Shares	18.19%	6.20%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	12.21%	5.43%
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)	18.22%	7.75%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed 1.30% and 1.60% 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.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard U.S. High Yield 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

2014-04-30

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

The Portfolio invests primarily in high-yielding US corporate fixed-income securities which, at the time of purchase, are rated below investment grade (lower than Baa by Moody’s or lower than BBB by S&P (“junk bonds”)). The Portfolio may invest in securities of non-US companies, including, to a limited extent, in companies in, or governments of, emerging market countries.

Under normal circumstances, the Portfolio invests at least 80% of its assets in bonds and other fixed-income securities of US companies rated, at the time of purchase, below investment grade by S&P or Moody’s and as low as the lowest rating assigned by S&P or Moody’s, or the unrated equivalent as determined by the Investment Manager. The Portfolio focuses its investments in high-yielding securities that may be considered “better quality” (B+ or higher by Moody’s or S&P or the unrated equivalent as determined by the Investment Manager). 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 in the credit quality of a bond, 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 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 currency fluctuations, 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.

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 High Yield 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 High Yield 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)

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.

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

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 (reflects no deduction for fees, expenses or taxes) (Open)

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%

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

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%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 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.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard International Strategic Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 52% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

52.00%

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. 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 invests primarily in equity securities, principally common stocks, of non-US companies whose principal activities are located in countries represented by the MSCI EAFE Index that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Portfolio may invest up to 15% of its assets in securities of companies whose principal business activities are located in emerging market countries, although the allocation of the Portfolio’s assets to emerging market countries may vary from time to time.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

The countries represented by the MSCI EAFE Index currently include: Australia, Austria, Belgium, Denmark, Finland, France, Germany, Greece, Hong Kong, Ireland, Israel, Italy, Japan, the Netherlands, New Zealand, Norway, Portugal, Singapore, Spain, Sweden, Switzerland and the United Kingdom.

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.

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 currency fluctuations, 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.

Non-Diversification Risk. Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios. The Portfolio’s 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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Larger Cap Companies Risk. The securities of large market cap companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The accompanying bar chart and table provide some indication of the risks of investing in Lazard International Strategic Equity 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 23.21%

Worst Quarter:
9/30/11 -19.36%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

23.21%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(19.36%)

Performance Table Heading

rr_PerformanceTableHeading

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

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.

MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.32%

5 Years

rr_AverageAnnualReturnYear05

(3.69%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.14%

MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.32%

5 Years

rr_AverageAnnualReturnYear05

(3.69%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

1.34%

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.13%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.13%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

115

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

359

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

622

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,375

1 Year

rr_AverageAnnualReturnYear01

24.74%

5 Years

rr_AverageAnnualReturnYear05

(0.49%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.79%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 03, 2006

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.11%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

0.86%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

88

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

274

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

477

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,061

Annual Return 2006

rr_AnnualReturn2006

26.22%

Annual Return 2007

rr_AnnualReturn2007

12.88%

Annual Return 2008

rr_AnnualReturn2008

(39.98%)

Annual Return 2009

rr_AnnualReturn2009

27.76%

Annual Return 2010

rr_AnnualReturn2010

14.43%

Annual Return 2011

rr_AnnualReturn2011

(9.70%)

Annual Return 2012

rr_AnnualReturn2012

25.00%

1 Year

rr_AverageAnnualReturnYear01

25.00%

5 Years

rr_AverageAnnualReturnYear05

(0.19%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.04%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 31, 2005

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

24.91%

5 Years

rr_AverageAnnualReturnYear05

(0.32%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.52%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

16.58%

5 Years

rr_AverageAnnualReturnYear05

(0.09%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.25%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard U.S. Municipal Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks current income exempt from regular federal income taxes, consistent with 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.

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

2014-04-30

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 US municipal securities, the interest on which is, in the opinion of the issuer’s counsel at the time of issuance, exempt from regular federal income tax. At times, a portion of the Portfolio’s assets exempt from regular income tax may be invested in securities subject to the alternative minimum tax (the “AMT”).

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.

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

The Portfolio also may invest in other securities that are not municipal securities. The Portfolio’s investments may include any type of debt instrument, including, for example, zero-coupon securities as well as floating- and variable-rate securities.

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 and coupon or other features.

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.

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 is usually greater for fixed-income securities with longer maturities or effective durations.

Municipal Securities Risk. A primary risk of municipal securities, like other fixed-income securities, is credit risk, which is the risk that the issuer will not make timely interest or principal payments. Payment by the issuer may depend on a relatively limited source of revenue, resulting in greater credit risk.

The values of municipal securities can fluctuate and may be affected by adverse tax law, legislative or political changes, and by financial or other developments affecting municipal issuers and the municipal securities market generally. If there is a decline, or perceived decline, in the credit quality of a municipal security (or institutions providing credit and liquidity enhancements), the security’s value could fall, potentially lowering the Portfolio’s share price.

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

Future changes in the activity of an issuer may adversely affect the tax-exempt status of municipal securities. If a municipal security fails to meet certain regulatory requirements to maintain its exempt tax status, the interest received by the Portfolio from its investment in such security, and the related distributions to Portfolio shareholders, will be taxable.

The size of certain municipal securities offerings may be relatively smaller in size than other debt offerings and, in some cases, the Portfolio, by itself or together with 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.

Liquidity Risk. The lack of a readily available market or restrictions on resale may limit the ability of the Portfolio to sell a security at the time and price it would like.

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 Municipal Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to that 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 Municipal Portfolio by showing the Portfolio's performance for the first complete calendar year of operation 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:
6/30/12 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)

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.

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

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

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

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

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 April 30, 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 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.

XML

Lazard Emerging Markets Multi-Strategy Portfolio

Lazard Emerging Markets Multi-Strategy 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard Emerging Markets Multi-Strategy 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 Emerging Markets Multi-Strategy Portfolio		Institutional Shares	Open Shares
Management Fees		1.00%	1.00%
Distribution and Service (12b-1) Fees		none	0.25%
Other Expenses		0.57%	2.57%
Total Annual Portfolio Operating Expenses		1.57%	3.82%
Fee Waiver and Expense Reimbursement	[1]	0.27%	2.22%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	1.30%	1.60%

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

Expense Example Lazard Emerging Markets Multi-Strategy Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	132	412	713	1,568
Open Shares	163	505	871	1,900

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 160% of the average value of its portfolio.

Principal Investment Strategies

The Investment Manager allocates the Portfolio’s assets among various emerging markets equity, debt and currency investment strategies managed by the Investment Manager in proportions consistent with the Investment Manager’s evaluation of various economic and other factors through quantitative and qualitative analysis. These proportions are changed from time to time, and at any given time the allocation to one strategy (other than currency investments) may comprise a substantial percentage of the Portfolio’s assets. The Investment Manager will make allocation decisions among the strategies based on quantitative and qualitative analysis using a number of different tools, including proprietary software models. Quantitative analysis includes, among others, statistical analysis of portfolio risks, factor dependencies and trading tendencies. Qualitative analysis includes, among others, analysis of the global economic environment as well as internal and external research on individual securities, portfolio holdings, attribution factors, behavioral patterns and overall market views and scenarios.

The Portfolio may invest in:

• equity securities, including common stocks and depositary receipts and shares

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

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

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

The Portfolio may invest in securities of any size or market capitalization. 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 (“junk bonds”) or securities that are unrated. Additionally, the Portfolio is not restricted to investments in debt securities of any particular maturity or duration.

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

Principal Investment Risks

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

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

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

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

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.

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

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

Fixed-Income and Debt Securities Risk. 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, and, during a time of declining interest rates, the Portfolio may have to reinvest the proceeds in an investment offering a lower yield (and the Portfolio may not benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

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

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

Foreign Currency Hedging Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates. The Investment Manager may not be able to accurately predict movements in exchange rates and there may be imperfect correlations between movements in exchange rates that could cause the Portfolio to incur significant losses. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of 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, over-the-counter options on securities (including options on ETFs) and currencies, structured notes and swap agreements are subject to the risk of default by the counterparty and can be illiquid. These derivatives transactions, as well as the exchange-traded options in which the Portfolio may invest, are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related currency, security or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions, even if entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

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

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 Emerging Markets Multi-Strategy Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to that 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:
3/31/12 12.14%

Worst Quarter:
6/30/12 -5.62%

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.

Average Annual Returns Lazard Emerging Markets Multi-Strategy Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	14.02%	(0.97%)	Mar. 31, 2011
Open Shares	13.28%	(1.26%)	Mar. 31, 2011
After Taxes on Distributions Institutional Shares	13.94%	(1.07%)
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	9.32%	(0.82%)
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)	18.22%	(3.18%)

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2023, to the extent Total Annual Portfolio Operating Expenses exceed 1.30% and 1.60% 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.

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Lazard Capital Allocator Opportunistic Strategies Portfolio

Lazard Capital Allocator Opportunistic Strategies Portfolio

Investment Objective

The Portfolio seeks long-term 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard Capital Allocator Opportunistic Strategies 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 Capital Allocator Opportunistic Strategies Portfolio		Institutional Shares	Open Shares
Management Fees		1.00%	1.00%
Distribution and Service (12b-1) Fees		none	0.25%
Other Expenses (including substitute dividend expense on securities sold short)		0.12%	0.42%
Acquired Fund Fees and Expenses (Underlying Funds)		0.39%	0.39%
Total Annual Portfolio Operating Expenses		1.51%	2.06%
Fee Waiver and Expense Reimbursement	[1]	0.10%	0.35%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	1.41%	1.71%

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 Capital Allocator Opportunistic Strategies Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	144	467	814	1,793
Open Shares	174	612	1,076	2,362

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 139% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio utilizes an asset allocation strategy to invest in a global portfolio of uncorrelated assets that can include exposure, through underlying vehicles, to stocks, bonds, commodities and other investments.

The Portfolio invests primarily in common stock of exchange-traded open-end management investment companies and similar products, which generally pursue a passive index-based strategy (commonly known as ETFs), as well as actively managed closed-end management investment companies (“closed-end funds”) and exchange-traded notes (“ETNs” and collectively with ETFs and closed-end funds, “Underlying Funds”). ETFs and ETNs in which the Portfolio may invest include both ETFs and ETNs designed to correlate directly with an index and ETFs and ETNs designed to correlate inversely with an index and may include actively-managed ETFs. The Portfolio, through Underlying Funds in which it invests, may invest in non-US companies (including those in emerging markets), and the Portfolio also may invest directly in equity and debt securities in addition to its investments in Underlying Funds. The Portfolio’s investment portfolio is concentrated in a relatively small number of holdings (generally 10 to 30). Investors can invest directly in Underlying Funds and do not need to invest in Underlying Funds through mutual funds or separately managed accounts.

The Portfolio may, but is not required to, effect short sales of securities; enter into futures contracts on indexes, commodities, interest rates and currencies; enter into equity, total return and currency swap agreements, and forward currency contracts; and write put and covered call options on securities (including ETFs and ETNs), indexes and currencies, for hedging purposes or to seek to increase returns, including as a substitute for purchasing an Underlying Fund.

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.

Underlying Funds Risk. Shares of ETFs and closed-end funds in which the Portfolio invests may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs and closed-end funds may trade at prices at, below or above their most recent NAV. Shares of closed-end funds, in particular, frequently trade at persistent discounts to their NAV. In addition, the performance of an ETF pursuing a passive index-based strategy may diverge from the performance of the index. ETNs may not trade in the secondary market, but typically are redeemable by the issuer. The Portfolio’s investments in Underlying Funds are subject to the risks of Underlying Funds’ investments, as well as to the general risks of investing in Underlying Funds. Portfolio shares will bear not only the Portfolio’s management fees and operating expenses, but also their proportional share of the management fees and operating expenses of the ETFs and closed-end funds in which the Portfolio invests. While ETNs do not have management fees, they are subject to certain investor fees. ETNs are debt securities that, like ETFs, typically are listed on exchanges and their terms generally provide for a return that tracks specified market indexes. However, unlike ETFs and closed-end funds, ETNs are not registered investment companies and thus are not regulated under the 1940 Act. In addition, as debt securities, ETNs are subject to the additional risk of the creditworthiness of the issuer. ETNs typically do not make periodic interest payments.

The Portfolio may be limited by the 1940 Act in the amount of its assets that may be invested in ETFs and closed-end funds unless an ETF or a closed-end fund has received an exemptive order from the Securities and Exchange Commission (the “SEC”) on which the Portfolio may rely or an exemption is available.

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 currency fluctuations, 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.

Debt Securities Risk. The market value of debt securities is affected by changes in prevailing interest rates and the perceived credit quality of the issuer. When prevailing interest rates fall or perceived credit quality improves, the market value of the affected debt securities generally rises. Conversely, when interest rates rise or perceived credit quality weakens, the market value of the affected debt securities generally declines.

Non-Diversification Risk. Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios. The Portfolio’s 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.

Short Sale Risk. Short sales may involve substantial risks. Short sales of securities expose the Portfolio to the risk that it will be required to “cover” the short position at a time when the underlying security has appreciated in value, thus resulting in a loss to the Portfolio that could be substantial.

Foreign Currency Hedging Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates. The Investment Manager may not be able to accurately predict movements in exchange rates and there may be imperfect correlations between movements in exchange rates that could cause the Portfolio to incur significant losses. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

Derivatives Risk. Derivatives transactions, including those entered into for hedging purposes, may reduce returns or increase volatility, perhaps substantially. Swap agreements, forward currency contracts and over-the-counter options on securities (including options on ETFs and ETNs), indexes and currencies are subject to the risk of default by the counterparty and can be illiquid. These derivatives transactions, as well as the futures contracts and 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 index, commodity, interest rate, currency, security or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions, even when entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

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

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 Capital Allocator Opportunistic Strategies Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to that of a broad measure of market performance. The bar chart shows how the performance of the Portfolio’s Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Best Quarter:
6/30/09 14.66%

Worst Quarter:
9/30/11 -10.44%

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. The Global Asset Allocation Blended Index is rebalanced quarterly and is a blended index constructed by the Investment Manager that is comprised of 60% MSCI World Index and 40% Barclays Capital US Aggregate Bond^® Index.

Average Annual Returns Lazard Capital Allocator Opportunistic Strategies Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	9.16%	2.40%	Mar. 26, 2008
Open Shares	8.84%	2.17%	Mar. 31, 2008
After Taxes on Distributions Institutional Shares	9.04%	1.86%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	6.12%	1.81%
MSCI World Index (reflects no deduction for fees, expenses or taxes) (Institutional)	15.83%	0.66%
MSCI World Index (reflects no deduction for fees, expenses or taxes) (Open)	15.83%	0.75%
Global Asset Allocation Blended Index (reflects no deduction for fees, expenses or taxes) (Institutional)	11.30%	3.46%
Global Asset Allocation Blended Index (reflects no deduction for fees, expenses or taxes) (Open)	11.30%	3.51%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed 1.02% and 1.32% 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.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Emerging Markets Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 23% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

23.00%

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. 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 invests primarily in equity securities, principally common stocks, of non-US companies whose principal activities are located in emerging market countries and that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values.

Emerging market countries include all countries represented by the MSCI Emerging Markets® Index, which currently includes: Brazil, Chile, China, Colombia, Czech Republic, Egypt, Hungary, India, Indonesia, Korea, Malaysia, Mexico, Morocco, Peru, Philippines, Poland, Russia, South Africa, Taiwan, Thailand and Turkey.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies whose principal business activities are located in emerging market countries.

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.

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 currency fluctuations, 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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Risk Lose Money [Text]

rr_RiskLoseMoney

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

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

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

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Equity 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 Emerging Markets Equity 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 34.12%

Worst Quarter:
12/31/08 -30.50%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

34.12%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(30.50%)

Performance Table Heading

rr_PerformanceTableHeading

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

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.

MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

18.22%

5 Years

rr_AverageAnnualReturnYear05

(0.92%)

10 Years

rr_AverageAnnualReturnYear10

16.52%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.54%

MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

18.22%

5 Years

rr_AverageAnnualReturnYear05

(0.92%)

10 Years

rr_AverageAnnualReturnYear10

16.52%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

7.47%

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

0.15%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.40%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

143

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

443

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

766

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,680

1 Year

rr_AverageAnnualReturnYear01

22.03%

5 Years

rr_AverageAnnualReturnYear05

1.46%

10 Years

rr_AverageAnnualReturnYear10

18.09%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

8.57%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 08, 1997

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

0.10%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.10%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

112

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

350

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

606

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,340

Annual Return 2003

rr_AnnualReturn2003

54.45%

Annual Return 2004

rr_AnnualReturn2004

30.79%

Annual Return 2005

rr_AnnualReturn2005

41.40%

Annual Return 2006

rr_AnnualReturn2006

30.32%

Annual Return 2007

rr_AnnualReturn2007

33.05%

Annual Return 2008

rr_AnnualReturn2008

(47.88%)

Annual Return 2009

rr_AnnualReturn2009

69.82%

Annual Return 2010

rr_AnnualReturn2010

22.81%

Annual Return 2011

rr_AnnualReturn2011

(17.75%)

Annual Return 2012

rr_AnnualReturn2012

22.36%

1 Year

rr_AverageAnnualReturnYear01

22.36%

5 Years

rr_AverageAnnualReturnYear05

1.81%

10 Years

rr_AverageAnnualReturnYear10

18.41%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

8.55%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 15, 1994

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

21.81%

5 Years

rr_AverageAnnualReturnYear05

0.96%

10 Years

rr_AverageAnnualReturnYear10

17.13%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

7.61%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

16.06%

5 Years

rr_AverageAnnualReturnYear05

1.37%

10 Years

rr_AverageAnnualReturnYear10

16.43%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

7.34%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard International Equity Select Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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

2023-04-30

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 46% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

46.00%

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

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Portfolio invests primarily in equity securities, including ADRs, GDRs and common stocks, of relatively large non-US companies with market capitalizations in the range of companies included in the MSCI EAFE Index (ranging from approximately $498.5 million to $232.6 billion as of April 9, 2013) that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values.

In choosing stocks for the Portfolio, the Investment Manager looks for established companies in economically developed countries. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

The Portfolio may invest in securities of companies whose principal business activities are located in emerging market countries in an amount up to the current emerging markets component of the MSCI All Country World Index ex-US plus 15%. The allocation of the Portfolio’s assets to emerging market countries may vary from time to time.

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.

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 currency fluctuations, 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.

Non-Diversification Risk. Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios. The Portfolio’s 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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Larger Cap Companies Risk. The securities of large market cap companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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 International Equity Select 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 International Equity Select 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 Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The MSCI EAFE/All Country World Index ex-US Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the MSCI EAFE Index for all periods through June 30, 2010 (when the Portfolio's benchmark index changed) and the MSCI All Country World Index ex-US for all periods thereafter.

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 18.73%

Worst Quarter:
9/30/11 -17.57%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

18.73%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(17.57%)

Performance Table Heading

rr_PerformanceTableHeading

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

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. The MSCI EAFE/All Country World Index ex-US Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the MSCI EAFE Index for all periods through June 30, 2010 (when the Portfolio’s benchmark index changed) and the MSCI All Country World Index ex-US for all periods thereafter.

MSCI All Country World Index ex-US (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

16.83%

5 Years

rr_AverageAnnualReturnYear05

(2.89%)

10 Years

rr_AverageAnnualReturnYear10

9.74%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.80%

MSCI EAFE/All Country World Index ex-US Linked Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

16.83%

5 Years

rr_AverageAnnualReturnYear05

(3.99%)

10 Years

rr_AverageAnnualReturnYear10

8.04%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.18%

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

3.67%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

4.77%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(3.32%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.45%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

148

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

459

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

792

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,735

1 Year

rr_AverageAnnualReturnYear01

21.23%

5 Years

rr_AverageAnnualReturnYear05

(2.23%)

10 Years

rr_AverageAnnualReturnYear10

6.90%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.73%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 31, 2001

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

3.32%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

4.17%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(3.02%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.15%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

117

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

365

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

633

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,398

Annual Return 2003

rr_AnnualReturn2003

29.80%

Annual Return 2004

rr_AnnualReturn2004

16.45%

Annual Return 2005

rr_AnnualReturn2005

8.90%

Annual Return 2006

rr_AnnualReturn2006

23.01%

Annual Return 2007

rr_AnnualReturn2007

9.25%

Annual Return 2008

rr_AnnualReturn2008

(38.74%)

Annual Return 2009

rr_AnnualReturn2009

20.86%

Annual Return 2010

rr_AnnualReturn2010

8.49%

Annual Return 2011

rr_AnnualReturn2011

(7.14%)

Annual Return 2012

rr_AnnualReturn2012

21.59%

1 Year

rr_AverageAnnualReturnYear01

21.59%

5 Years

rr_AverageAnnualReturnYear05

(1.94%)

10 Years

rr_AverageAnnualReturnYear10

7.21%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.01%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 31, 2001

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

21.28%

5 Years

rr_AverageAnnualReturnYear05

(2.42%)

10 Years

rr_AverageAnnualReturnYear10

6.50%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.38%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

14.81%

5 Years

rr_AverageAnnualReturnYear05

(1.58%)

10 Years

rr_AverageAnnualReturnYear10

6.53%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.61%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2023, to the extent Total Annual Portfolio Operating Expenses exceed 1.15% and 1.45% 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.

XML

Lazard International Equity Portfolio

Lazard International Equity Portfolio

Investment Objective

The Portfolio seeks long-term 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard International Equity 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 International Equity Portfolio	Institutional Shares	Open Shares
Management Fees	0.75%	0.75%
Distribution and Service (12b-1) Fees	none	0.25%
Other Expenses	0.27%	0.32%
Total Annual Portfolio Operating Expenses	1.02%	1.32%

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 International Equity Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	104	325	563	1,248
Open Shares	134	418	723	1,590

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 48% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of relatively large non-US companies with market capitalizations in the range of companies included in the Morgan Stanley Capital International (“MSCI®”) Europe, Australasia and Far East (“EAFE®”) Index (ranging from approximately $498.5 million to $232.6 billion as of April 9, 2013) that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values.

In choosing stocks for the Portfolio, the Investment Manager looks for established companies in economically developed countries and may invest up to 15% of the Portfolio’s assets in securities of companies whose principal business activities are located in emerging market countries. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

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.

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 currency fluctuations, 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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Larger Cap Companies Risk. The securities of large market cap companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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 International Equity 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 21.90%

Worst Quarter:
9/30/11 -17.77%

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.

Average Annual Returns Lazard International Equity Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	22.70%	(0.83%)	8.14%	6.11%	Oct. 29, 1991
Open Shares	22.30%	(1.14%)	7.82%	4.67%	Jan. 23, 1997
After Taxes on Distributions Institutional Shares	22.26%	(1.01%)	7.81%	5.20%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	15.78%	(0.58%)	7.26%	5.04%
MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Institutional)	17.32%	(3.69%)	8.21%	5.10%
MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Open)	17.32%	(3.69%)	8.21%	4.45%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Capital Allocator Opportunistic Strategies Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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

2014-04-30

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 139% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

139.00%

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

The Portfolio utilizes an asset allocation strategy to invest in a global portfolio of uncorrelated assets that can include exposure, through underlying vehicles, to stocks, bonds, commodities and other investments.

The Portfolio invests primarily in common stock of exchange-traded open-end management investment companies and similar products, which generally pursue a passive index-based strategy (commonly known as ETFs), as well as actively managed closed-end management investment companies (“closed-end funds”) and exchange-traded notes (“ETNs” and collectively with ETFs and closed-end funds, “Underlying Funds”). ETFs and ETNs in which the Portfolio may invest include both ETFs and ETNs designed to correlate directly with an index and ETFs and ETNs designed to correlate inversely with an index and may include actively-managed ETFs. The Portfolio, through Underlying Funds in which it invests, may invest in non-US companies (including those in emerging markets), and the Portfolio also may invest directly in equity and debt securities in addition to its investments in Underlying Funds. The Portfolio’s investment portfolio is concentrated in a relatively small number of holdings (generally 10 to 30). Investors can invest directly in Underlying Funds and do not need to invest in Underlying Funds through mutual funds or separately managed accounts.

The Portfolio may, but is not required to, effect short sales of securities; enter into futures contracts on indexes, commodities, interest rates and currencies; enter into equity, total return and currency swap agreements, and forward currency contracts; and write put and covered call options on securities (including ETFs and ETNs), indexes and currencies, for hedging purposes or to seek to increase returns, including as a substitute for purchasing an Underlying 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.

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.

Underlying Funds Risk. Shares of ETFs and closed-end funds in which the Portfolio invests may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs and closed-end funds may trade at prices at, below or above their most recent NAV. Shares of closed-end funds, in particular, frequently trade at persistent discounts to their NAV. In addition, the performance of an ETF pursuing a passive index-based strategy may diverge from the performance of the index. ETNs may not trade in the secondary market, but typically are redeemable by the issuer. The Portfolio’s investments in Underlying Funds are subject to the risks of Underlying Funds’ investments, as well as to the general risks of investing in Underlying Funds. Portfolio shares will bear not only the Portfolio’s management fees and operating expenses, but also their proportional share of the management fees and operating expenses of the ETFs and closed-end funds in which the Portfolio invests. While ETNs do not have management fees, they are subject to certain investor fees. ETNs are debt securities that, like ETFs, typically are listed on exchanges and their terms generally provide for a return that tracks specified market indexes. However, unlike ETFs and closed-end funds, ETNs are not registered investment companies and thus are not regulated under the 1940 Act. In addition, as debt securities, ETNs are subject to the additional risk of the creditworthiness of the issuer. ETNs typically do not make periodic interest payments.

The Portfolio may be limited by the 1940 Act in the amount of its assets that may be invested in ETFs and closed-end funds unless an ETF or a closed-end fund has received an exemptive order from the Securities and Exchange Commission (the “SEC”) on which the Portfolio may rely or an exemption is available.

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 currency fluctuations, 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.

Debt Securities Risk. The market value of debt securities is affected by changes in prevailing interest rates and the perceived credit quality of the issuer. When prevailing interest rates fall or perceived credit quality improves, the market value of the affected debt securities generally rises. Conversely, when interest rates rise or perceived credit quality weakens, the market value of the affected debt securities generally declines.

Non-Diversification Risk. Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios. The Portfolio’s 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.

Short Sale Risk. Short sales may involve substantial risks. Short sales of securities expose the Portfolio to the risk that it will be required to “cover” the short position at a time when the underlying security has appreciated in value, thus resulting in a loss to the Portfolio that could be substantial.

Foreign Currency Hedging Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates. The Investment Manager may not be able to accurately predict movements in exchange rates and there may be imperfect correlations between movements in exchange rates that could cause the Portfolio to incur significant losses. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

Derivatives Risk. Derivatives transactions, including those entered into for hedging purposes, may reduce returns or increase volatility, perhaps substantially. Swap agreements, forward currency contracts and over-the-counter options on securities (including options on ETFs and ETNs), indexes and currencies are subject to the risk of default by the counterparty and can be illiquid. These derivatives transactions, as well as the futures contracts and 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 index, commodity, interest rate, currency, security or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions, even when entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

High Portfolio Turnover Risk. The Portfolio’s investment strategy may involve high portfolio turnover (such as 100% or more). A portfolio turnover rate of 100%, for example, is equivalent to the Portfolio buying and selling all of its securities once during the course of the year. A high portfolio turnover rate could result in high 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.

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 Capital Allocator Opportunistic Strategies Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to that of a broad measure of market performance. The bar chart shows how the performance of the Portfolio’s Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Capital Allocator Opportunistic Strategies 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 Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The Global Asset Allocation Blended Index is rebalanced quarterly and is a blended index constructed by the Investment Manager that is comprised of 60% MSCI World Index and 40% Barclays Capital US Aggregate Bond Index.

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 14.66%

Worst Quarter:
9/30/11 -10.44%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

14.66%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(10.44%)

Performance Table Heading

rr_PerformanceTableHeading

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

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. The Global Asset Allocation Blended Index is rebalanced quarterly and is a blended index constructed by the Investment Manager that is comprised of 60% MSCI World Index and 40% Barclays Capital US Aggregate Bond^® Index.

MSCI World Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

15.83%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.66%

MSCI World Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

15.83%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

0.75%

Global Asset Allocation Blended Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.30%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.46%

Global Asset Allocation Blended Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.30%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.51%

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 (including substitute dividend expense on securities sold short)

rr_Component1OtherExpensesOverAssets

0.12%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.39%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.51%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.10%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.41%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

144

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

467

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

814

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,793

Annual Return 2009

rr_AnnualReturn2009

21.21%

Annual Return 2010

rr_AnnualReturn2010

14.58%

Annual Return 2011

rr_AnnualReturn2011

(3.28%)

Annual Return 2012

rr_AnnualReturn2012

9.16%

1 Year

rr_AverageAnnualReturnYear01

9.16%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.40%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 26, 2008

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

9.04%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

1.86%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

6.12%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

1.81%

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 (including substitute dividend expense on securities sold short)

rr_Component1OtherExpensesOverAssets

0.42%

Acquired Fund Fees and Expenses (Underlying Funds)

rr_AcquiredFundFeesAndExpensesOverAssets

0.39%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.06%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.35%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.71%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

174

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

612

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,076

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,362

1 Year

rr_AverageAnnualReturnYear01

8.84%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.17%

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 31, 2008

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed 1.02% and 1.32% 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.

XML

Lazard U.S. Strategic Equity Portfolio

Lazard U.S. Strategic Equity Portfolio

Investment Objective

The Portfolio seeks long-term 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard U.S. Strategic Equity 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 U.S. Strategic Equity Portfolio		Institutional Shares	Open Shares
Management Fees		0.70%	0.70%
Distribution and Service (12b-1) Fees		none	0.25%
Other Expenses		0.29%	0.42%
Total Annual Portfolio Operating Expenses		0.99%	1.37%
Fee Waiver and Expense Reimbursement	[1]	0.24%	0.32%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	0.75%	1.05%

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 U.S. Strategic Equity Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	77	291	524	1,191
Open Shares	107	402	719	1,618

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 60% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of US companies that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. Although the Portfolio generally focuses on large cap companies, the market capitalizations of issuers in which the Portfolio invests may vary with market conditions and the Portfolio also may invest in mid cap and small cap companies.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of US companies. The Portfolio may invest up to 15% of its total assets in securities of non-US companies, including American Depositary Receipts (“ADRs”) and Global Depositary Receipts (“GDRs”).

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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Larger Cap Companies Risk. The securities of large market cap companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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

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 currency fluctuations, 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.

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

Best Quarter:
6/30/09 16.46%

Worst Quarter:
12/31/08 -23.06%

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.

Average Annual Returns Lazard U.S. Strategic Equity Portfolio	1 Year	5 Years	Life of Portfolio	Inception Date
Institutional Shares	14.56%	1.73%	3.80%	Dec. 30, 2004
Open Shares	14.10%	1.42%	3.50%	Dec. 30, 2004
After Taxes on Distributions Institutional Shares	14.17%	1.49%	3.11%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	9.96%	1.43%	3.08%
S&P 500 Index (reflects no deduction for fees, expenses or taxes)	16.00%	1.66%	4.20%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .75% and 1.05% 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.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Global Fixed Income Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

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

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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

2014-04-30

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 47% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

47.00%

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 Investments. “Fixed Income Investments” include all types of debt and income producing securities and other instruments, including bonds, notes (including structured notes), mortgage-related securities, asset-backed securities, Eurodollar and Yankee dollar instruments, money market instruments and foreign currency forward contracts, including non-deliverable forward contracts. Fixed Income Investments may be issued by US or foreign corporations or entities, including those with business activities located in emerging market countries; US or foreign banks; the US government, its agencies, authorities, instrumentalities or sponsored enterprises; US state and municipal governments; foreign governments and their political subdivisions; and supranational organizations (such as the World Bank). Fixed Income Investments may have any type of interest rate payment terms, including fixed rate, adjustable rate or zero coupon features.

In managing the Portfolio’s assets, the Investment Manager employs a relative value approach that is driven by its macroeconomic view of global interest rates, yield curves, sector spreads, and currencies, combined with an opportunistic, but disciplined, security selection process. The Investment Manager seeks to enhance the Portfolio’s total return by rotating investments through global bond and credit markets, maintaining or seeking exposure to foreign currencies in the discretion of the Investment Manager. The Investment Manager seeks to identify and exploit market inefficiencies (such as spread relationships between sectors in different countries, and undervalued or overlooked markets and securities) in seeking to achieve attractive risk-adjusted returns. The Investment Manager also seeks to identify investment opportunities with asymmetric risk/reward characteristics in seeking to enhance portfolio performance and mitigate risk.

The Portfolio’s currency exposure generally is managed relative to that of the Barclays Capital Global Aggregate Bond Index—Unhedged in US dollar terms, and tactical exposures to non-US dollar currencies are based on the Investment Manager’s fundamental macroeconomic outlook, technical factors and the Investment Manager’s desired market positioning.

Under normal market conditions, the Portfolio invests significantly (at least 40%—unless market conditions are not deemed favorable by the Investment Manager, in which case the Portfolio would invest at least 30%) in issuers organized or located outside the US or doing a substantial amount of business outside the US, securities denominated in a foreign currency or foreign currency forward contracts. The Investment Manager allocates the Portfolio’s assets among various regions, countries and currencies, including the United States and the US dollar (but in no less than three different countries or currencies). The Portfolio may invest in securities of issuers with business activities located in emerging market countries or denominated in an emerging market currency.

The Portfolio may invest up to 15% of its assets in securities that are rated below investment grade (lower than Baa by Moody’s or lower than BBB by S&P) (“junk bonds”) or the unrated equivalent as determined by the Investment Manager. There are no restrictions on the Portfolio’s average portfolio maturity or duration or on the maturities of the individual debt and income producing securities and other instruments in which it may invest.

In addition to purchasing or selling foreign currency forward contracts, the Portfolio may, but is not required to, purchase and sell options on foreign currencies, for hedging purposes or to seek to increase returns.

Risk [Heading]

rr_RiskHeading

Principal Investment Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

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

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 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 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

Any investments in lower-rated, higher-yielding securities are subject to greater credit risk than its higher rated investments. Non-investment grade securities tend to be more volatile, less liquid and are considered speculative.

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).

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 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.

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.

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.

Foreign Currency Hedging Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates. The Investment Manager may not be able to accurately predict movements in exchange rates and there may be imperfect correlations between movements in exchange rates that could cause the Portfolio to incur significant losses. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of 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, over-the-counter options on currencies and structured products are subject to the risk of default by the counterparty and can be illiquid. These derivatives transactions, as well as the exchange-traded options and other derivatives transactions 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 or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions, even if entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

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

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

Because the Portfolio did not have a full calendar year of performance as of 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 that of a broad measure of market performance. Updated performance information is 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 did not have a full calendar year of performance as of 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

0.50%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

8.31%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

8.81%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(8.01%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.80%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

82

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

1,848

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

3,483

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

7,055

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.50%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

25.71%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

26.46%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(25.36%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.10%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

112

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

4,494

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

7,197

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

10,248

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .80% and 1.10% 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.

XML

Lazard U.S. Municipal Portfolio

Lazard U.S. Municipal Portfolio

Investment Objective

The Portfolio seeks current income exempt from regular federal income taxes, consistent with 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard U.S. Municipal 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 U.S. Municipal 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%

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 U.S. Municipal 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 US municipal securities, the interest on which is, in the opinion of the issuer’s counsel at the time of issuance, exempt from regular federal income tax. At times, a portion of the Portfolio’s assets exempt from regular income tax may be invested in securities subject to the alternative minimum tax (the “AMT”).

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.

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

The Portfolio also may invest in other securities that are not municipal securities. The Portfolio’s investments may include any type of debt instrument, including, for example, zero-coupon securities as well as floating- and variable-rate securities.

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 and coupon or other features.

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.

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 is usually greater for fixed-income securities with longer maturities or effective durations.

Municipal Securities Risk. A primary risk of municipal securities, like other fixed-income securities, is credit risk, which is the risk that the issuer will not make timely interest or principal payments. Payment by the issuer may depend on a relatively limited source of revenue, resulting in greater credit risk.

The values of municipal securities can fluctuate and may be affected by adverse tax law, legislative or political changes, and by financial or other developments affecting municipal issuers and the municipal securities market generally. If there is a decline, or perceived decline, in the credit quality of a municipal security (or institutions providing credit and liquidity enhancements), the security’s value could fall, potentially lowering the Portfolio’s share price.

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

Future changes in the activity of an issuer may adversely affect the tax-exempt status of municipal securities. If a municipal security fails to meet certain regulatory requirements to maintain its exempt tax status, the interest received by the Portfolio from its investment in such security, and the related distributions to Portfolio shareholders, will be taxable.

The size of certain municipal securities offerings may be relatively smaller in size than other debt offerings and, in some cases, the Portfolio, by itself or together with 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.

Liquidity Risk. The lack of a readily available market or restrictions on resale may limit the ability of the Portfolio to sell a security at the time and price it would like.

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 Municipal Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to that 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.

Average Annual Returns Lazard U.S. Municipal 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 1-10 Year Municipal Bond Index (reflects no deduction for fees, expenses or taxes)	2.98%	4.92%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 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 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.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard International Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 48% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

48.00%

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. 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 invests primarily in equity securities, principally common stocks, of relatively large non-US companies with market capitalizations in the range of companies included in the Morgan Stanley Capital International (“MSCI®”) Europe, Australasia and Far East (“EAFE®”) Index (ranging from approximately $498.5 million to $232.6 billion as of April 9, 2013) that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values.

In choosing stocks for the Portfolio, the Investment Manager looks for established companies in economically developed countries and may invest up to 15% of the Portfolio’s assets in securities of companies whose principal business activities are located in emerging market countries. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

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.

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 currency fluctuations, 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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Larger Cap Companies Risk. The securities of large market cap companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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 International Equity 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 International Equity 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 21.90%

Worst Quarter:
9/30/11 -17.77%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

21.90%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(17.77%)

Performance Table Heading

rr_PerformanceTableHeading

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

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.

MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.32%

5 Years

rr_AverageAnnualReturnYear05

(3.69%)

10 Years

rr_AverageAnnualReturnYear10

8.21%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.10%

MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.32%

5 Years

rr_AverageAnnualReturnYear05

(3.69%)

10 Years

rr_AverageAnnualReturnYear10

8.21%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.45%

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.32%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.32%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

134

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

418

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

723

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,590

1 Year

rr_AverageAnnualReturnYear01

22.30%

5 Years

rr_AverageAnnualReturnYear05

(1.14%)

10 Years

rr_AverageAnnualReturnYear10

7.82%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.67%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 23, 1997

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.27%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.02%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

104

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

325

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

563

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,248

Annual Return 2003

rr_AnnualReturn2003

29.51%

Annual Return 2004

rr_AnnualReturn2004

16.01%

Annual Return 2005

rr_AnnualReturn2005

11.25%

Annual Return 2006

rr_AnnualReturn2006

22.92%

Annual Return 2007

rr_AnnualReturn2007

10.96%

Annual Return 2008

rr_AnnualReturn2008

(37.75%)

Annual Return 2009

rr_AnnualReturn2009

25.19%

Annual Return 2010

rr_AnnualReturn2010

8.04%

Annual Return 2011

rr_AnnualReturn2011

(7.17%)

Annual Return 2012

rr_AnnualReturn2012

22.70%

1 Year

rr_AverageAnnualReturnYear01

22.70%

5 Years

rr_AverageAnnualReturnYear05

(0.83%)

10 Years

rr_AverageAnnualReturnYear10

8.14%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.11%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 29, 1991

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

22.26%

5 Years

rr_AverageAnnualReturnYear05

(1.01%)

10 Years

rr_AverageAnnualReturnYear10

7.81%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.20%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

15.78%

5 Years

rr_AverageAnnualReturnYear05

(0.58%)

10 Years

rr_AverageAnnualReturnYear10

7.26%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.04%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard U.S. Small-Mid Cap Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 92% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

92.00%

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. 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 invests primarily in equity securities, principally common stocks, of small to mid capitalization US companies. The Investment Manager considers “small-mid cap companies” to be those companies that, at the time of initial purchase by the Portfolio, have market capitalizations within the range of companies included in the Russell 2500^® Index (ranging from approximately $18.5 million to $10.9 billion as of April 9, 2013).

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of small-mid cap US companies. The Investment Manager focuses on relative value in seeking to construct a diversified portfolio of investments for the Portfolio that maintains sector and industry balance, using investment opportunities identified through bottom-up fundamental research conducted by the Investment Manager’s small cap, mid cap and global research analysts.

The Portfolio may invest up to 20% of its assets in equity securities of larger US companies and may invest up to 10% of its total assets in equity securities of non-US companies, including ADRs and GDRs.

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.

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

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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 currency fluctuations, 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.

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 Small-Mid Cap Equity 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 Small-Mid Cap Equity 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 Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The Russell 2000/2500 Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the Russell 2000 Index for all periods through August 24, 2008 (when the Portfolio's investment focus was changed from small cap companies to small-mid cap companies) and the Russell 2500 Index for all periods thereafter.

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]

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Best Quarter:
6/30/09 28.30%

Worst Quarter:
9/30/11 -26.02%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

28.30%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(26.02%)

Performance Table Heading

rr_PerformanceTableHeading

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

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

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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. The Russell 2000/2500 Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the Russell 2000® Index for all periods through August 24, 2008 (when the Portfolio’s investment focus was changed from small cap companies to small-mid cap companies) and the Russell 2500 Index for all periods thereafter.

Russell 2500 Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.88%

5 Years

rr_AverageAnnualReturnYear05

4.34%

10 Years

rr_AverageAnnualReturnYear10

10.49%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.39%

Russell 2500 Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.88%

5 Years

rr_AverageAnnualReturnYear05

4.34%

10 Years

rr_AverageAnnualReturnYear10

10.49%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

8.28%

Russell 2000/2500 Linked Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.88%

5 Years

rr_AverageAnnualReturnYear05

4.78%

10 Years

rr_AverageAnnualReturnYear10

10.36%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

9.30%

Russell 2000/2500 Linked Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.88%

5 Years

rr_AverageAnnualReturnYear05

4.78%

10 Years

rr_AverageAnnualReturnYear10

10.36%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

7.15%

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.21%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.21%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

123

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

384

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

665

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,466

1 Year

rr_AverageAnnualReturnYear01

14.97%

5 Years

rr_AverageAnnualReturnYear05

5.22%

10 Years

rr_AverageAnnualReturnYear10

8.81%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.89%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jan. 30, 1997

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.13%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

0.88%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

90

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

281

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

488

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,084

Annual Return 2003

rr_AnnualReturn2003

38.92%

Annual Return 2004

rr_AnnualReturn2004

15.28%

Annual Return 2005

rr_AnnualReturn2005

4.31%

Annual Return 2006

rr_AnnualReturn2006

17.11%

Annual Return 2007

rr_AnnualReturn2007

(6.38%)

Annual Return 2008

rr_AnnualReturn2008

(34.46%)

Annual Return 2009

rr_AnnualReturn2009

55.47%

Annual Return 2010

rr_AnnualReturn2010

23.67%

Annual Return 2011

rr_AnnualReturn2011

(9.83%)

Annual Return 2012

rr_AnnualReturn2012

15.45%

1 Year

rr_AverageAnnualReturnYear01

15.45%

5 Years

rr_AverageAnnualReturnYear05

5.58%

10 Years

rr_AverageAnnualReturnYear10

9.16%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.33%

Inception Date

rr_AverageAnnualReturnInceptionDate

Oct. 30, 1991

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

14.99%

5 Years

rr_AverageAnnualReturnYear05

4.96%

10 Years

rr_AverageAnnualReturnYear10

7.23%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

8.10%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

10.64%

5 Years

rr_AverageAnnualReturnYear05

4.56%

10 Years

rr_AverageAnnualReturnYear10

7.35%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

8.13%

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Lazard U.S. Realty Income Portfolio

Lazard U.S. Realty Income Portfolio

Investment Objectives

The Portfolio’s primary investment objective is current income,

with long-term capital appreciation as a secondary objective.

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 U.S. Realty 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 U.S. Realty Income Portfolio		Institutional Shares	Open Shares
Management Fees		0.75%	0.75%
Distribution and Service (12b-1) Fees		none	0.25%
Other Expenses		0.41%	0.47%
Total Annual Portfolio Operating Expenses		1.16%	1.47%
Fee Waiver and Expense Reimbursement	[1]	0.01%	0.02%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	1.15%	1.45%

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

Expense Example Lazard U.S. Realty Income Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	117	365	635	1,406
Open Shares	148	459	797	1,752

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 period, the Portfolio’s portfolio turnover rate was 42% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Portfolio invests at least 80% of its assets in dividend-paying common and preferred stocks, convertible securities and fixed income securities of US Realty Companies (defined below), as well as certain synthetic instruments related to US Realty Companies. Such synthetic instruments are investments that have economic characteristics similar to the Portfolio’s direct investments in US Realty Companies and may include warrants, rights, options and shares of ETFs.

The Investment Manager focuses on investments having the potential to deliver regular income and to offer the opportunity for long-term growth and capital appreciation. The Investment Manager conducts proprietary quantitative, qualitative and on-site real estate analysis to select the Portfolio’s investments, which may include, as appropriate, research at the macroeconomic, sector, company and property level. The Investment Manager’s individual company research may consider a number of quantitative measures, including earnings growth potential, price to earnings or free cash flow multiples, price to NAV ratios, dividend yield and potential for growth, return on equity and return on assets, as well as qualitative factors such as overall business and growth strategy and quality of management.

“Realty Companies” are real estate-related companies of any size including, but not limited to, real estate investment trusts (“REITs”), real estate operating or service companies and companies in the homebuilding, lodging and hotel industries, as well as companies engaged in the healthcare, gaming, retailing, restaurant, natural resources and utility industries, and other companies whose investments, balance sheets or income statements are real-estate intensive (i.e., the company’s actual or anticipated revenues, profits, assets, services or products are related to real estate including, but not limited to, the ownership, renting, leasing, construction, management, development or financing of commercial, industrial or residential real estate).

The Portfolio’s investments in preferred stock and convertible and fixed income securities may include securities which, at the time of purchase, are rated below “investment grade” by a nationally recognized statistical rating organization (“NRSRO”), or the unrated equivalent as determined by the Investment Manager (“junk bonds”).

The Portfolio may invest in issuers of any market capitalization and securities of any maturity, and the Portfolio’s investments also may include securities purchased in initial public offerings (“IPOs”).

The Portfolio also may invest up to 25% of its net assets in companies organized as master limited partnerships and their affiliates.

The Portfolio also may invest up to 20% of its assets in other securities and instruments of companies or entities (which need not be US Realty Companies), including, but not limited to, securities of non-US companies and other investment companies.

The Portfolio may, but is not required to, write put and covered call options on securities and indexes, for hedging purposes or to seek to increase returns.

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.

Realty Companies Risk. Since the Portfolio focuses its investments in Realty Companies, the Portfolio could lose money due to the performance of real estate-related securities even if securities markets generally are experiencing positive results. The performance of investments made by the Portfolio may be determined to a great extent by the current status of the real estate industry in general, or by other factors (such as interest rates and the availability of loan capital) that may affect the real estate industry, even if other industries would not be so affected. Consequently, the investment strategies of the Portfolio could lead to securities investment results that may be significantly different from investments in securities of other industries or sectors or in a more broad-based portfolio generally.

The risks related to investments in Realty Companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing. An investment in REITs may be adversely affected or lost if the REIT fails to comply with applicable laws and regulations. If the Portfolio invests in a REIT that subsequently fails to qualify as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”), it is highly likely that the REIT will be subject to a substantial additional income tax liability that could cause it to liquidate investments, borrow funds under adverse conditions or, possibly, fail.

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

Preferred Securities Risk. There are various risks associated with investing in preferred securities, including credit risk; interest rate risk; deferral and omission of distributions; subordination; call and reinvestment risk; limited liquidity; limited voting rights; and special issuer redemption rights. In addition, unlike common stock, participation in the growth of an issuer may be limited.

• Credit risk is the risk that a security held by the Portfolio will decline in price or the issuer of the security will fail to make dividend, interest or principal payments when due because the issuer experiences a decline in its financial status.

• Interest rate risk is the risk that securities will decline in value because of changes in market interest rates. When market interest rates rise, the market value of such securities generally will fall. Securities with longer periods before maturity or effective durations may be more sensitive to interest rate changes.

• Preferred securities may include provisions that permit the issuer, at its discretion, to defer or omit distributions for a stated period without any adverse consequences to the issuer.

• Preferred securities are generally subordinated to bonds and other debt instruments in an issuer’s capital structure in terms of having priority to corporate income, claims to corporate assets and liquidation payments, and therefore will be subject to greater credit risk than more senior debt instruments.

• During periods of declining interest rates, an issuer may be able to exercise an option to call, redeem, its issue at par earlier than the scheduled maturity, which is generally known as call risk. If this occurs during a time of lower or declining interest rates, the Portfolio may have to reinvest the proceeds in lower yielding securities (and the Portfolio may not benefit from any increase in the value of its portfolio holdings as a result of declining interest rates). This is known as reinvestment risk.

• Certain preferred securities may be substantially less liquid than many other securities, such as common stocks or US Government securities. Illiquid securities involve the risk that the securities will not be able to be sold at the time desired by the Portfolio or at prices approximating the value at which the Portfolio is carrying the securities on its books.

• Generally, traditional preferred securities offer no voting rights with respect to the issuer unless preferred dividends have been in arrears for a specified number of periods, at which time the preferred security holders may elect a number of directors to the issuer’s board. Generally, once all the arrearages have been paid, the preferred security holders no longer have voting rights. Hybrid-preferred security holders generally have no voting rights.

• In certain varying circumstances, an issuer of preferred securities may redeem the securities prior to a specified date. For instance, for certain types of preferred securities, a redemption may be triggered by a change in US federal income tax or securities laws. As with call provisions, a redemption by the issuer may negatively impact the return of the security held by the Portfolio.

Other Equity Securities Risks. The market value of a convertible security tends to perform like that of a regular debt security so that, if market interest rates rise, the value of the convertible security falls. Investments in warrants involve certain risks, including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the warrant can be prudently exercised, in which case the warrant may expire without being exercised and result in a loss of the Portfolio’s entire investment.

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. Fixed income securities are subject to interest rate risk, credit risk and call and reinvestment risk as described above for preferred securities. The Portfolio’s investments in lower-rated, higher-yielding securities are subject to greater credit risk than its higher-rated investments. If there is a decline in the credit quality of a fixed-income security (or any guarantor of payment on such security), or a perception of a decline, the security’s value could fall, potentially lowering the Portfolio’s share price. Junk bonds tend to be more volatile, less liquid and are considered speculative. During unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like.

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 currency fluctuations, 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.

Non-Diversification Risk. Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios. The Portfolio’s 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.

Options Risk. Writing options on securities and indexes, including for hedging purposes, may reduce returns or increase volatility, perhaps substantially, and may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions. Writing options is subject to many of the risks of, and can be highly sensitive to changes in the value of, the related security or index. As such, a small commitment to written options could potentially have a relatively large impact on the Portfolio’s performance. Purchasing options will reduce returns by the amount of premiums paid for options that are not exercised. Over-the-counter options purchased on securities and indexes are subject to the risk of default by the counterparty and can be illiquid.

Investment Companies and ETF Risk. Any investments in other investment companies and ETFs are subject to the risks of the investments of the investment companies and ETFs, as well as to the general risks of investing in investment companies and ETFs. Portfolio shares will bear not only the Portfolio’s management fees and operating expenses, but also their proportional share of the management fees and operating expenses of any other investment companies and ETFs in which the Portfolio invests.

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

The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Realty Income Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to that of broad measures of market performance. The Portfolio commenced operations after all of the assets of an investment company advised by Grubb & Ellis Alesco Global Advisors, LLC (“Alesco”), Grubb & Ellis AGA Realty Income Fund (the “Predecessor Realty Income Fund”), were transferred to the Portfolio in exchange for Open Shares of the Portfolio in a tax-free reorganization on September 23, 2011. The bar chart shows how the performance of the Portfolio’s Open Shares (or the Predecessor Realty Income Fund’s Class A shares, prior to September 23, 2011) has varied from year to year. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Best Quarter:
6/30/09 40.10%

Worst Quarter:
3/31/09 -13.67%

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

After-tax returns for the Open Shares will 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. The 50% FTSE NAREIT All Equity REITs® Index/50% Wells Fargo Hybrid and Preferred Securities REIT® Index shown in the table is an unmanaged index created by the Investment Manager, and is a 50/50 blend of the FTSE NAREIT All Equity REITs Index and the Wells Fargo Hybrid and Preferred Securities REIT Index. In future periods the Portfolio will no longer compare its performance to that of the S&P 500 Index, because the other indicies shown are believed to provide more appropriate comparisons for the Portfolio’s performance.

Average Annual Returns Lazard U.S. Realty Income Portfolio	1 Year	Life of Portfolio	Inception Date
Open Shares	23.00%	13.95%	Jul. 30, 2008
Institutional Shares	23.32%	26.99%	Sep. 26, 2011
After Taxes on Distributions Open Shares	20.14%	9.42%
After Taxes on Distributions and Sale of Portfolio Shares Open Shares	14.93%	9.66%
FTSE NAREIT All Equity REITs Index (reflects no deduction for fees, expenses or taxes) (Open)	19.70%	5.77%
FTSE NAREIT All Equity REITs Index (reflects no deduction for fees, expenses or taxes) (Institutional)	19.70%	27.38%
Wells Fargo Hybrid and Preferred Securities REIT Index (reflects no deduction for fees, expenses or taxes) (Open)	11.38%	15.65%
Wells Fargo Hybrid and Preferred Securities REIT Index (reflects no deduction for fees, expenses or taxes) (Institutional)	11.38%	12.39%
50% FTSE NAREIT All Equity REITs Index/50% Wells Fargo Hybrid and Preferred Securities REIT Index (reflects no deduction for fees, expenses or taxes) (Open)	15.61%	11.73%
50% FTSE NAREIT All Equity REITs Index/50% Wells Fargo Hybrid and Preferred Securities REIT Index (reflects no deduction for fees, expenses or taxes) (Institutional)	15.61%	19.98%
S&P 500 Index (reflects no deduction for fees, expenses or taxes) (Open)	16.00%	4.74%
S&P 500 Index (reflects no deduction for fees, expenses or taxes) (Institutional)	16.00%	22.36%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2016, to the extent Total Annual Portfolio Operating Expenses exceed 1.15% and 1.45% 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.

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Lazard International Equity Select Portfolio

Lazard International Equity Select Portfolio

Investment Objective

The Portfolio seeks long-term 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard International Equity Select 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 International Equity Select Portfolio		Institutional Shares	Open Shares
Management Fees		0.85%	0.85%
Distribution and Service (12b-1) Fees		none	0.25%
Other Expenses		3.32%	3.67%
Total Annual Portfolio Operating Expenses		4.17%	4.77%
Fee Waiver and Expense Reimbursement	[1]	3.02%	3.32%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	1.15%	1.45%

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

Expense Example Lazard International Equity Select Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	117	365	633	1,398
Open Shares	148	459	792	1,735

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 46% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, including ADRs, GDRs and common stocks, of relatively large non-US companies with market capitalizations in the range of companies included in the MSCI EAFE Index (ranging from approximately $498.5 million to $232.6 billion as of April 9, 2013) that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values.

In choosing stocks for the Portfolio, the Investment Manager looks for established companies in economically developed countries. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

The Portfolio may invest in securities of companies whose principal business activities are located in emerging market countries in an amount up to the current emerging markets component of the MSCI All Country World Index ex-US plus 15%. The allocation of the Portfolio’s assets to emerging market countries may vary from time to time.

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.

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 currency fluctuations, 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.

Non-Diversification Risk. Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios. The Portfolio’s 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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Larger Cap Companies Risk. The securities of large market cap companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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 International Equity Select 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 18.73%

Worst Quarter:
9/30/11 -17.57%

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. The MSCI EAFE/All Country World Index ex-US Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the MSCI EAFE Index for all periods through June 30, 2010 (when the Portfolio’s benchmark index changed) and the MSCI All Country World Index ex-US for all periods thereafter.

Average Annual Returns Lazard International Equity Select Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	21.59%	(1.94%)	7.21%	4.01%	May 31, 2001
Open Shares	21.23%	(2.23%)	6.90%	3.73%	May 31, 2001
After Taxes on Distributions Institutional Shares	21.28%	(2.42%)	6.50%	3.38%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	14.81%	(1.58%)	6.53%	3.61%
MSCI All Country World Index ex-US (reflects no deduction for fees, expenses or taxes)	16.83%	(2.89%)	9.74%	5.80%
MSCI EAFE/All Country World Index ex-US Linked Index (reflects no deduction for fees, expenses or taxes)	16.83%	(3.99%)	8.04%	4.18%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2023, to the extent Total Annual Portfolio Operating Expenses exceed 1.15% and 1.45% 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.

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Lazard Global Listed Infrastructure Portfolio

Lazard Global Listed Infrastructure Portfolio

Investment Objective

The Portfolio seeks total return.

Fees and Expenses

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

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Lazard Global Listed Infrastructure 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 Global Listed Infrastructure Portfolio	Institutional Shares	Open Shares
Management Fees	0.90%	0.90%
Distribution and Service (12b-1) Fees	none	0.25%
Other Expenses	0.24%	0.35%
Total Annual Portfolio Operating Expenses	1.14%	1.50%

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 Global Listed Infrastructure Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	116	362	628	1,386
Open Shares	153	474	818	1,791

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

The Portfolio invests primarily in equity securities, principally common stocks, of infrastructure companies and concentrates its investments in industries represented by infrastructure companies. The Investment Manager focuses on companies with a minimum market capitalization of $250 million that own physical infrastructure and which the Investment Manager believes are undervalued.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of infrastructure companies, which consist of utilities, pipelines, toll roads, airports, railroads, ports, telecommunications and other infrastructure companies, with securities listed on a national or other recognized securities exchange.

Under normal market conditions, the Portfolio invests significantly (at least 40%—unless market conditions are not deemed favorable by the Investment Manager, in which case the Portfolio would invest at least 30%) in infrastructure companies organized or located outside the US or doing a substantial amount of business outside the US. The Investment Manager allocates the Portfolio’s assets among various regions and countries, including the United States (but in no less than three different countries). The Portfolio may invest in equity securities of companies with some business activities located in emerging market countries.

The Investment Manager generally seeks to substantially hedge foreign currency exposure in the Portfolio back to the US dollar by entering into foreign currency forward contracts, although the Portfolio’s total foreign currency exposure may not be fully hedged at all times.

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.

Infrastructure Companies Risk. Securities and instruments of infrastructure companies are more susceptible to adverse economic or regulatory occurrences affecting their industries. Infrastructure companies may be subject to a variety of factors that may adversely affect their business or operations, including high interest costs in connection with capital construction programs, high leverage, costs associated with environmental and other regulations, the effects of economic slowdown, surplus capacity, increased competition from other providers of services, uncertainties concerning the availability of fuel at reasonable prices, the effects of energy conservation policies and other factors. Infrastructure companies also may be affected by or subject to:

• regulation by various government authorities, including rate regulation;

• service interruption due to environmental, operational or other mishaps;

• the imposition of special tariffs and changes in tax laws, regulatory policies and accounting standards; and

• general changes in market sentiment towards infrastructure and utilities 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 currency fluctuations, 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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Foreign Currency Hedging Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates. The Investment Manager may not be able to accurately predict movements in exchange rates and there may be imperfect correlations between movements in exchange rates that could cause the Portfolio to incur significant losses. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

Forward Currency Contract Risk. Forward currency contracts may reduce returns or increase volatility, perhaps substantially. Forward currency contracts are subject to the risk of default by the counterparty to the contracts and can be illiquid. These contracts are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related currency. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of forward currency contracts, even when entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Larger Cap Companies Risk. The securities of large market cap companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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 Global Listed Infrastructure Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to that of broad measures of market performance. The bar chart shows how the performance of the Portfolio’s Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Best Quarter:
9/30/10 12.17%

Worst Quarter:
9/30/11 -9.85%

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.

Average Annual Returns Lazard Global Listed Infrastructure Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	18.05%	7.40%	Dec. 31, 2009
Open Shares	17.54%	6.99%	Dec. 31, 2009
After Taxes on Distributions Institutional Shares	17.62%	6.96%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	13.33%	6.50%
UBS Global 50/50 Infrastructure & Utilities® Index (Hedged) (reflects no deduction for fees, expenses or taxes)	12.38%	5.10%
Morgan Stanley Capital International® World Index (reflects no deduction for fees, expenses or taxes)	15.83%	6.93%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard U.S. Equity Concentrated Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term 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)

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2014-04-30

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 116% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

116.00%

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

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Portfolio invests primarily in equity securities, principally common stocks, of US companies of any market capitalization. The Portfolio has a concentrated portfolio of investments, typically investing in 15 to 35 companies with market capitalizations generally greater than $350 million. The Portfolio seeks to outperform broad-based securities market indices, such as the S&P 500® Index, the Russell 1000® Index and the Russell 3000® Index. The Investment Manager’s philosophy employed for the Portfolio is based on value creation through its process of bottom-up stock selection, and the Investment Manager implements a disciplined portfolio construction process. The Investment Manager’s fundamental research seeks to identify investments typically featuring robust organic cash flow, balance sheet strength and operational flexibility.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of US companies. The Portfolio may invest up to 10% of its total assets in securities of non-US companies that trade in US markets.

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.

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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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

Larger Cap Companies Risk. The securities of large market cap companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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-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 Year-by-Year Total Returns for Institutional Shares As of 12/31

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

As of May 31, 2012, the Portfolio changed its name from Lazard US Equity Value Portfolio to Lazard US Equity Concentrated Portfolio, adopted the Portfolio’s current investment strategies and compares its performance to the S&P 500 Index. Prior to May 31, 2012, the Portfolio was classified as a “diversified” fund under the 1940 Act.

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

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Equity Concentrated Portfolio by showing the Portfolio's year-by-year performance and its average annual performance (prior to the change in investment strategy described above) compared to that of broad measures of market performance.

Performance Additional Market Index [Text]

rr_PerformanceAdditionalMarketIndex

The Russell 1000 Value/S&P 500 Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the Russell 1000 Value Index for all periods through May 30, 2012 (when the Portfolio's investment strategy changed) and the S&P 500 Index for all periods thereafter.

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 19.10%

Worst Quarter:
12/31/08 -21.54%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

19.10%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(21.54%)

Performance Table Heading

rr_PerformanceTableHeading

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

Performance Table Market Index Changed

rr_PerformanceTableMarketIndexChanged

In future periods the Portfolio will no longer compare its performance to that of the Russell 1000 Value Index.

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. The Russell 1000 Value/S&P 500 Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the Russell 1000 Value Index for all periods through May 30, 2012 (when the Portfolio’s investment strategy changed) and the S&P 500 Index for all periods thereafter. In future periods the Portfolio will no longer compare its performance to that of the Russell 1000 Value Index.

S&P 500 Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

16.00%

5 Years

rr_AverageAnnualReturnYear05

1.66%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.27%

Russell 1000 Value Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.51%

5 Years

rr_AverageAnnualReturnYear05

0.59%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.38%

Russell 1000 Value/S&P 500 Linked Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

13.90%

5 Years

rr_AverageAnnualReturnYear05

(0.03%)

Life of Portfolio

rr_AverageAnnualReturnSinceInception

2.94%

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.70%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

3.89%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

4.84%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(3.59%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.25%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

127

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

428

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

752

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,667

1 Year

rr_AverageAnnualReturnYear01

16.51%

5 Years

rr_AverageAnnualReturnYear05

0.22%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.54%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 30, 2005

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.70%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.58%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.28%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.33%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.95%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

97

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

335

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

592

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,327

Annual Return 2006

rr_AnnualReturn2006

25.23%

Annual Return 2007

rr_AnnualReturn2007

1.65%

Annual Return 2008

rr_AnnualReturn2008

(36.18%)

Annual Return 2009

rr_AnnualReturn2009

24.81%

Annual Return 2010

rr_AnnualReturn2010

12.00%

Annual Return 2011

rr_AnnualReturn2011

(1.47%)

Annual Return 2012

rr_AnnualReturn2012

16.83%

1 Year

rr_AverageAnnualReturnYear01

16.83%

5 Years

rr_AverageAnnualReturnYear05

0.53%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.83%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 30, 2005

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

16.67%

5 Years

rr_AverageAnnualReturnYear05

0.30%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.14%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.15%

5 Years

rr_AverageAnnualReturnYear05

0.41%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.00%

[1] Reflects a contractual agreement by Lazard Asset Management LLC (the "Investment Manager") to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014 to the extent Total Annual Portfolio Operating Expenses exceed .95% and 1.25% of the average daily net assets of the Portfolio's Institutional Shares and Open Shares, respectively, and from May 1, 2014 through April 30, 2023, to the extent Total Annual Portfolio Operating Expenses exceed 1.10% and 1.40% of the average daily net assets of the Portfolio's Institutional Shares and Open Shares, respectively. All limitations on Total Annual Portfolio Operating Expenses are 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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Lazard International Realty Equity Portfolio

Lazard International Realty Equity Portfolio

Investment Objectives

The Portfolio’s primary investment objective is long-term capital appreciation,

with current income, including interest and dividends from portfolio securities, as a secondary objective.

Fees and Expenses

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

Shareholder Fees (fees paid directly from your investment)

Shareholder Fees Lazard International Realty Equity 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 International Realty Equity Portfolio		Institutional Shares	Open Shares
Management Fees		0.90%	0.90%
Distribution and Service (12b-1) Fees		none	0.25%
Other Expenses		4.94%	4.98%
Total Annual Portfolio Operating Expenses		5.84%	6.13%
Fee Waiver and Expense Reimbursement	[1]	4.54%	4.53%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	1.30%	1.60%

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

Expense Example Lazard International Realty Equity Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	132	412	1,704	4,839
Open Shares	163	505	1,845	5,065

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 period, the Portfolio’s portfolio turnover rate was 42% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities (including common, convertible and preferred stocks) of non-US Realty Companies (defined below), as well as certain synthetic instruments relating to non-US Realty Companies. Such synthetic instruments are investments that have economic characteristics similar to the Portfolio’s direct investments in non-US Realty Companies and may include depositary receipts, including ADRs, GDRs and European Depositary Receipts, warrants, rights, options and shares of ETFs. The Portfolio’s investments in non-US companies may include securities of companies whose principal business activities are located in emerging market countries.

The Investment Manager conducts proprietary quantitative, qualitative and on-site real estate analysis to select the Portfolio’s investments, which may include, as appropriate, research at the macroeconomic, sector, company and property level. The Investment Manager’s individual company research may consider a number of quantitative measures, including earnings growth potential, price to earnings or free cash flow multiples, price to NAV ratios, dividend yield and potential for growth, return on equity and return on assets, as well as qualitative factors such as overall business and growth strategy and quality of management.

“Realty Companies” are real estate-related companies of any size including, but not limited to, REITs, real estate operating or service companies and companies in the homebuilding, lodging and hotel industries, as well as companies engaged in the healthcare, gaming, retailing, restaurant, natural resources and utility industries, and other companies whose investments, balance sheets or income statements are real-estate intensive (i.e., the company’s actual or anticipated revenues, profits, assets, services or products are related to real estate including, but not limited to, the ownership, renting, leasing, construction, management, development or financing of commercial, industrial or residential real estate).

The Portfolio may invest in issuers of any market capitalization and securities of any maturity, and the Portfolio’s investments also may include securities purchased in IPOs.

The Portfolio is classified as “non-diversified” under 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.

The Portfolio also may invest up to 20% of its assets in equity and fixed income securities and instruments of companies or entities (which need not be non-US Realty Companies), including, but not limited to, other investment companies and collective investment funds.

The Portfolio’s investments in preferred stock and convertible and fixed income securities may include securities which, at the time of purchase, are rated below “investment grade” by an NRSRO, or the unrated equivalent as determined by the Investment Manager (“junk bonds”).

The Portfolio may, but is not required to, enter into forward currency contracts and write put and covered call options on securities and indexes, for hedging purposes or to seek to increase returns.

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.

Equity Securities Risks. While stocks have historically been a leading choice of long-term investors, they do fluctuate in price, often based on factors unrelated to the issuer’s value, such as investor perception. Preferred stock is subject to credit and interest rate risk (described below) and the risk that the dividend on the stock may be changed or omitted by the issuer and, unlike common stock, participation in the growth of an issuer may be limited. The market value of a convertible security tends to perform like that of a regular debt security so that, if market interest rates rise, the value of the convertible security falls. Investments in warrants involve certain risks, including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the warrant can be prudently exercised, in which case the warrant may expire without being exercised and result in a loss of the Portfolio’s entire investment.

Realty Companies Risk. Since the Portfolio focuses its investments in Realty Companies, the Portfolio could lose money due to the performance of real estate-related securities even if securities markets generally are experiencing positive results. The performance of investments made by the Portfolio may be determined to a great extent by the current status of the real estate industry in general, or by other factors (such as interest rates and the availability of loan capital) that may affect the real estate industry, even if other industries would not be so affected. Consequently, the investment strategies of the Portfolio could lead to securities investment results that may be significantly different from investments in securities of other industries or sectors or in a more broad-based portfolio generally.

The risks related to investments in Realty Companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing. An investment in REITs may be adversely affected or lost if the REIT fails to comply with applicable laws and regulations. If the Portfolio invests in a REIT that subsequently fails to qualify as a REIT under the Code, it is highly likely that the REIT will be subject to a substantial additional income tax liability that could cause it to liquidate investments, borrow funds under adverse conditions or, possibly, fail.

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

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 currency fluctuations, 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.

Foreign Currency Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates.

Non-Diversification Risk. Because the Portfolio may invest in a smaller number of issuers than other, more diversified investment portfolios, the Portfolio’s 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.

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 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. If there is a decline, or 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. Junk bonds tend to be more volatile, less liquid and are considered speculative. During unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like. Some fixed-income securities may give the issuer the option to call, or redeem, the securities before their maturity, and, during a time of lower or declining interest rates, the Portfolio may have to reinvest the proceeds in lower yielding securities (and the Portfolio may not benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

Derivatives Risk. Derivatives transactions, including those entered into for hedging purposes, may reduce returns or increase volatility, perhaps substantially. Forward currency contracts and over-the-counter options on securities and indexes are subject to the risk of default by the counterparty and can be illiquid. These derivative transactions as well as 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 security or currency. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Purchasing options will reduce returns by the amount of premiums paid for options that are not exercised. Use of derivatives transactions, even if entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Investment Companies and ETF Risk. Any investments in other investment companies, collective investment funds and ETFs are subject to the risks of the investments of the investment companies, collective investment funds and ETFs, as well as to the general risks of investing in investment companies, collective investment funds and ETFs. Portfolio shares will bear not only the Portfolio’s management fees and operating expenses, but also their proportional share of the management fees and operating expenses of the other investment companies, collective investment funds and ETFs in which the Portfolio invests.

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

The accompanying bar chart and table provide some indication of the risks of investing in Lazard International Realty Equity 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 Portfolio commenced operations after all of the assets of an investment company advised by Alesco, Grubb & Ellis AGA International Realty Fund (the “Predecessor International Realty Fund”), were transferred to the Portfolio in exchange for Open Shares of the Portfolio in a tax-free reorganization on September 23, 2011. The bar chart shows how the performance of the Portfolio’s Open Shares (or the Predecessor International Realty Fund’s Class A shares, prior to September 23, 2011) has varied from year to year. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Best Quarter:
6/30/09 31.31%

Worst Quarter:
9/30/11 -22.48%

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

After-tax returns for the Open Shares will 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.

Average Annual Returns Lazard International Realty Equity Portfolio	1 Year	Life of Portfolio	Inception Date
Open Shares	44.81%	24.84%	Dec. 31, 2008
Institutional Shares	45.14%	34.34%	Sep. 26, 2011
After Taxes on Distributions Open Shares	43.16%	21.91%
After Taxes on Distributions and Sale of Portfolio Shares Open Shares	29.33%	20.35%
FTSE EPRA/NAREIT Global ex-US Index (reflects no deduction for fees, expenses or taxes) (Open)	38.98%	18.58%
FTSE EPRA/NAREIT Global ex-US Index (reflects no deduction for fees, expenses or taxes) (Institutional)	38.98%	31.12%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2016, to the extent Total Annual Portfolio Operating Expenses exceed 1.30% and 1.60% 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.

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Lazard Developing Markets Equity Portfolio

Lazard Developing Markets Equity Portfolio

Investment Objective

The Portfolio seeks long-term 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard Developing Markets Equity 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 Developing Markets Equity Portfolio	Institutional Shares	Open Shares
Management Fees	1.00%	1.00%
Distribution and Service (12b-1) Fees	none	0.25%
Other Expenses	0.21%	0.28%
Total Annual Portfolio Operating Expenses	1.21%	1.53%

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 Developing Markets Equity Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	123	384	665	1,466
Open Shares	156	483	834	1,824

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 61% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of non-US companies whose principal activities are located in emerging market countries (also known as “developing markets”).

Emerging market countries include all countries represented by the MSCI Emerging Markets Index, which currently includes: Brazil, Chile, China, Colombia, Czech Republic, Egypt, Hungary, India, Indonesia, Korea, Malaysia, Mexico, Morocco, Peru, Philippines, Poland, Russia, South Africa, Taiwan, Thailand and Turkey.

The Investment Manager employs a relative growth investment philosophy that is based on value creation through the process of bottom-up stock selection. The Investment Manager’s approach consists of an analytical framework, accounting validation, fundamental analysis and portfolio construction parameters. The Investment Manager’s selection process focuses on growth and considers the sustainability of growth and the trade off between valuation and growth.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies whose principal business activities are located in emerging market countries.

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.

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 currency fluctuations, 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.

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

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 Developing Markets Equity 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 varied from year to year. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Best Quarter:
6/30/09 56.64%

Worst Quarter:
9/30/11 -28.53%

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.

Average Annual Returns Lazard Developing Markets Equity Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	17.16%	10.33%	Sep. 30, 2008
Open Shares	16.79%	10.02%	Sep. 30, 2008
After Taxes on Distributions Institutional Shares	17.13%	8.89%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	11.48%	8.28%
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)	18.22%	9.69%

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Lazard U.S. Equity Concentrated Portfolio

Lazard U.S. Equity Concentrated Portfolio

Investment Objective

The Portfolio seeks long-term 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 U.S. Equity Concentrated 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 U.S. Equity Concentrated Portfolio		Institutional Shares	Open Shares
Management Fees		0.70%	0.70%
Distribution and Service (12b-1) Fees		none	0.25%
Other Expenses		0.58%	3.89%
Total Annual Portfolio Operating Expenses		1.28%	4.84%
Fee Waiver and Expense Reimbursement	[1]	0.33%	3.59%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	0.95%	1.25%

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

Expense Example Lazard U.S. Equity Concentrated Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	97	335	592	1,327
Open Shares	127	428	752	1,667

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 116% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of US companies of any market capitalization. The Portfolio has a concentrated portfolio of investments, typically investing in 15 to 35 companies with market capitalizations generally greater than $350 million. The Portfolio seeks to outperform broad-based securities market indices, such as the S&P 500® Index, the Russell 1000® Index and the Russell 3000® Index. The Investment Manager’s philosophy employed for the Portfolio is based on value creation through its process of bottom-up stock selection, and the Investment Manager implements a disciplined portfolio construction process. The Investment Manager’s fundamental research seeks to identify investments typically featuring robust organic cash flow, balance sheet strength and operational flexibility.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of US companies. The Portfolio may invest up to 10% of its total assets in securities of non-US companies that trade in US markets.

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.

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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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

Larger Cap Companies Risk. The securities of large market cap companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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-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 Year-by-Year Total Returns for Institutional Shares As of 12/31

As of May 31, 2012, the Portfolio changed its name from Lazard US Equity Value Portfolio to Lazard US Equity Concentrated Portfolio, adopted the Portfolio’s current investment strategies and compares its performance to the S&P 500 Index. Prior to May 31, 2012, the Portfolio was classified as a “diversified” fund under the 1940 Act.

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

Best Quarter:
6/30/09 19.10%

Worst Quarter:
12/31/08 -21.54%

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. The Russell 1000 Value/S&P 500 Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the Russell 1000 Value Index for all periods through May 30, 2012 (when the Portfolio’s investment strategy changed) and the S&P 500 Index for all periods thereafter. In future periods the Portfolio will no longer compare its performance to that of the Russell 1000 Value Index.

Average Annual Returns Lazard U.S. Equity Concentrated Portfolio	1 Year	5 Years	Life of Portfolio	Inception Date
Institutional Shares	16.83%	0.53%	3.83%	Sep. 30, 2005
Open Shares	16.51%	0.22%	3.54%	Sep. 30, 2005
After Taxes on Distributions Institutional Shares	16.67%	0.30%	3.14%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	11.15%	0.41%	3.00%
S&P 500 Index (reflects no deduction for fees, expenses or taxes)	16.00%	1.66%	4.27%
Russell 1000 Value Index (reflects no deduction for fees, expenses or taxes)	17.51%	0.59%	3.38%
Russell 1000 Value/S&P 500 Linked Index (reflects no deduction for fees, expenses or taxes)	13.90%	(0.03%)	2.94%

[1] Reflects a contractual agreement by Lazard Asset Management LLC (the "Investment Manager") to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014 to the extent Total Annual Portfolio Operating Expenses exceed .95% and 1.25% of the average daily net assets of the Portfolio's Institutional Shares and Open Shares, respectively, and from May 1, 2014 through April 30, 2023, to the extent Total Annual Portfolio Operating Expenses exceed 1.10% and 1.40% of the average daily net assets of the Portfolio's Institutional Shares and Open Shares, respectively. All limitations on Total Annual Portfolio Operating Expenses are 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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Lazard Global Fixed Income Portfolio

Lazard Global Fixed Income 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard Global Fixed 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 Global Fixed Income Portfolio		Institutional Shares	Open Shares
Management Fees		0.50%	0.50%
Distribution and Service (12b-1) Fees		none	0.25%
Other Expenses		8.31%	25.71%
Total Annual Portfolio Operating Expenses		8.81%	26.46%
Fee Waiver and Expense Reimbursement	[1]	8.01%	25.36%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	0.80%	1.10%

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 Global Fixed Income Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	82	1,848	3,483	7,055
Open Shares	112	4,494	7,197	10,248

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 47% 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 Investments. “Fixed Income Investments” include all types of debt and income producing securities and other instruments, including bonds, notes (including structured notes), mortgage-related securities, asset-backed securities, Eurodollar and Yankee dollar instruments, money market instruments and foreign currency forward contracts, including non-deliverable forward contracts. Fixed Income Investments may be issued by US or foreign corporations or entities, including those with business activities located in emerging market countries; US or foreign banks; the US government, its agencies, authorities, instrumentalities or sponsored enterprises; US state and municipal governments; foreign governments and their political subdivisions; and supranational organizations (such as the World Bank). Fixed Income Investments may have any type of interest rate payment terms, including fixed rate, adjustable rate or zero coupon features.

In managing the Portfolio’s assets, the Investment Manager employs a relative value approach that is driven by its macroeconomic view of global interest rates, yield curves, sector spreads, and currencies, combined with an opportunistic, but disciplined, security selection process. The Investment Manager seeks to enhance the Portfolio’s total return by rotating investments through global bond and credit markets, maintaining or seeking exposure to foreign currencies in the discretion of the Investment Manager. The Investment Manager seeks to identify and exploit market inefficiencies (such as spread relationships between sectors in different countries, and undervalued or overlooked markets and securities) in seeking to achieve attractive risk-adjusted returns. The Investment Manager also seeks to identify investment opportunities with asymmetric risk/reward characteristics in seeking to enhance portfolio performance and mitigate risk.

The Portfolio’s currency exposure generally is managed relative to that of the Barclays Capital Global Aggregate Bond Index—Unhedged in US dollar terms, and tactical exposures to non-US dollar currencies are based on the Investment Manager’s fundamental macroeconomic outlook, technical factors and the Investment Manager’s desired market positioning.

Under normal market conditions, the Portfolio invests significantly (at least 40%—unless market conditions are not deemed favorable by the Investment Manager, in which case the Portfolio would invest at least 30%) in issuers organized or located outside the US or doing a substantial amount of business outside the US, securities denominated in a foreign currency or foreign currency forward contracts. The Investment Manager allocates the Portfolio’s assets among various regions, countries and currencies, including the United States and the US dollar (but in no less than three different countries or currencies). The Portfolio may invest in securities of issuers with business activities located in emerging market countries or denominated in an emerging market currency.

The Portfolio may invest up to 15% of its assets in securities that are rated below investment grade (lower than Baa by Moody’s or lower than BBB by S&P) (“junk bonds”) or the unrated equivalent as determined by the Investment Manager. There are no restrictions on the Portfolio’s average portfolio maturity or duration or on the maturities of the individual debt and income producing securities and other instruments in which it may invest.

In addition to purchasing or selling foreign currency forward contracts, the Portfolio may, but is not required to, purchase and sell options on foreign currencies, for hedging purposes or to seek to increase returns.

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 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 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

Any investments in lower-rated, higher-yielding securities are subject to greater credit risk than its higher rated investments. Non-investment grade securities tend to be more volatile, less liquid and are considered speculative.

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).

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 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.

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.

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.

Foreign Currency Hedging Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates. The Investment Manager may not be able to accurately predict movements in exchange rates and there may be imperfect correlations between movements in exchange rates that could cause the Portfolio to incur significant losses. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of 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, over-the-counter options on currencies and structured products are subject to the risk of default by the counterparty and can be illiquid. These derivatives transactions, as well as the exchange-traded options and other derivatives transactions 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 or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions, even if entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Performance Bar Chart and Table

Because the Portfolio did not have a full calendar year of performance as of 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 that of a broad measure of market performance. Updated performance information is 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.

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .80% and 1.10% 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.

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Label

Element

Value

Risk/Return:

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Risk/Return [Heading]

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Lazard U.S. Realty Equity Portfolio

Objective [Heading]

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Investment Objectives

Objective, Primary [Text Block]

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The Portfolio’s primary investment objective is long-term capital appreciation,

Objective, Secondary [Text Block]

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with current income, including interest and dividends from portfolio securities, as a secondary objective.

Expense [Heading]

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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]

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Shareholder Transaction Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

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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

2023-04-30

Portfolio Turnover [Heading]

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Portfolio Turnover

Portfolio Turnover [Text Block]

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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 period, the Portfolio’s portfolio turnover rate was 52% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

52.00%

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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

Strategy [Heading]

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Principal Investment Strategies

Strategy Narrative [Text Block]

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Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities (including common, convertible and preferred stocks) of US Realty Companies (defined below), as well as certain synthetic instruments related to US Realty Companies. Such synthetic instruments are investments that have economic characteristics similar to the Portfolio’s direct investments in US Realty Companies and may include warrants, rights, options and shares of ETFs.

The Investment Manager conducts proprietary quantitative, qualitative and on-site real estate analysis to select the Portfolio’s investments, which may include, as appropriate, research at the macroeconomic, sector, company and property level. The Investment Manager’s individual company research may consider a number of quantitative measures, including earnings growth potential, price to earnings or free cash flow multiples, price to NAV ratios, dividend yield and potential for growth, return on equity and return on assets, as well as qualitative factors such as overall business and growth strategy and quality of management.

“Realty Companies” are real estate-related companies of any size including, but not limited to, REITs, real estate operating or service companies and companies in the homebuilding, lodging and hotel industries, as well as companies engaged in the healthcare, gaming, retailing, restaurant, natural resources and utility industries, and other companies whose investments, balance sheets or income statements are real-estate intensive (i.e. the company’s actual or anticipated revenues, profits, assets, services or products are related to real estate including, but not limited to, the ownership, renting, leasing, construction, management, development or financing of commercial, industrial or residential real estate).

The Portfolio may invest in issuers of any market capitalization and securities of any maturity, and the Portfolio’s investments also may include securities purchased in IPOs.

The Portfolio is classified as “non-diversified” under 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.

The Portfolio also may invest up to 20% of its assets in equity and fixed income securities and instruments of companies or entities (which need not be US Realty Companies), including, but not limited to, securities of non-US companies and other investment companies.

The Portfolio’s investments in preferred stock and convertible and fixed income securities may include securities which, at the time of purchase, are rated below “investment grade” by an NRSRO, or the unrated equivalent as determined by the Investment Manager (“junk bonds”).

The Portfolio may, but is not required to, write put and covered call options on securities and indexes, for hedging purposes or to seek to increase returns.

Risk [Heading]

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Principal Investment Risks

Risk Narrative [Text Block]

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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.

Securities Risks. While stocks have historically been a leading choice of long-term investors, they do fluctuate in price, often based on factors unrelated to the issuer’s value, such as investor perception. Preferred stock is subject to credit and interest rate risk (described below) and the risk that the dividend on the stock may be changed or omitted by the issuer and, unlike common stock, participation in the growth of an issuer may be limited. The market value of a convertible security tends to perform like that of a regular debt security so that, if market interest rates rise, the value of the convertible security falls. Investments in warrants involve certain risks, including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the warrant can be prudently exercised, in which case the warrant may expire without being exercised and result in a loss of the Portfolio’s entire investment.

Realty Companies Risk. Since the Portfolio focuses its investments in Realty Companies, the Portfolio could lose money due to the performance of real estate-related securities even if securities markets generally are experiencing positive results. The performance of investments made by the Portfolio may be determined to a great extent by the current status of the real estate industry in general, or by other factors (such as interest rates and the availability of loan capital) that may affect the real estate industry, even if other industries would not be so affected. Consequently, the investment strategies of the Portfolio could lead to securities investment results that may be significantly different from investments in securities of other industries or sectors or in a more broad-based portfolio generally.

The risks related to investments in Realty Companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing. An investment in REITs may be adversely affected or lost if the REIT fails to comply with applicable laws and regulations. If the Portfolio invests in a REIT that subsequently fails to qualify as a REIT under the Code, it is highly likely that the REIT will be subject to a substantial additional income tax liability that could cause it to liquidate investments, borrow funds under adverse conditions or, possibly, fail.

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

Non-Diversification Risk. Because the Portfolio may invest in a smaller number of issuers than other, more diversified investment portfolios, the Portfolio’s 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.

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 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. If there is a decline, or 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. Junk bonds tend to be more volatile, less liquid and are considered speculative. During unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like. Some fixed-income securities may give the issuer the option to call, or redeem, the securities before their maturity, and, during a time of lower or declining interest rates, the Portfolio may have to reinvest the proceeds in lower yielding securities (and the Portfolio may not benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

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 currency fluctuations, 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.

Options Risk. Writing options on securities and indexes, including for hedging purposes, may reduce returns or increase volatility, perhaps substantially, and may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions. Writing options is subject to many of the risks of, and can be highly sensitive to changes in the value of, the related security or index. As such, a small commitment to written options could potentially have a relatively large impact on the Portfolio’s performance. Purchasing options will reduce returns by the amount of premiums paid for options that are not exercised. Over-the-counter options purchased on securities and indexes are subject to the risk of default by the counterparty and can be illiquid.

Investment Companies and ETF Risk. Any investments in other investment companies and ETFs are subject to the risks of the investments of the investment companies and ETFs, as well as to the general risks of investing in investment companies and ETFs. Portfolio shares will bear not only the Portfolio’s management fees and operating expenses, but also their proportional share of the management fees and operating expenses of any other investment companies and ETFs in which the Portfolio invests.

Risk Lose Money [Text]

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

Risk Nondiversified Status [Text]

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Because the Portfolio may invest in a smaller number of issuers than other, more diversified investment portfolios, the Portfolio's 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]

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

Performance Narrative [Text Block]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Realty Equity 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 Portfolio commenced operations after all of the assets of an investment company advised by Alesco, Grubb & Ellis AGA U.S. Realty Fund (the “Predecessor Realty Equity Fund”), were transferred to the Portfolio in exchange for Open Shares of the Portfolio in a tax-free reorganization on September 23, 2011. The bar chart shows how the performance of the Portfolio’s Open Shares (or the Predecessor Realty Equity Fund’s Class A shares, prior to September 23, 2011) has varied from year to year. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Performance Information Illustrates Variability of Returns [Text]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Realty Equity 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]

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(800) 823-6300

Performance Availability Website Address [Text]

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www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

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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]

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Best Quarter:
9/30/09 36.29%

Worst Quarter:
9/30/11 -17.99%

Highest Quarterly Return, Label

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Best Quarter:

Highest Quarterly Return, Date

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Sep. 30, 2009

Highest Quarterly Return

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36.29%

Lowest Quarterly Return, Label

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Worst Quarter:

Lowest Quarterly Return, Date

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Sep. 30, 2011

Lowest Quarterly Return

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(17.99%)

Performance Table Heading

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

Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deduction for fees, expenses or taxes)

Performance Table Uses Highest Federal Rate

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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

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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.

Performance Table Narrative

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After-tax returns for the Open Shares will 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.

FTSE NAREIT All Equity REITs Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

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1 Year

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19.70%

Life of Portfolio

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20.70%

FTSE NAREIT All Equity REITs Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

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1 Year

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19.70%

Life of Portfolio

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27.38%

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

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(1.00%)

Management Fees

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0.80%

Distribution and Service (12b-1) Fees

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0.25%

Other Expenses

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0.73%

Total Annual Portfolio Operating Expenses

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1.78%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.28%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.50%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

153

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

474

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

818

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,791

Annual Return 2009

rr_AnnualReturn2009

59.47%

Annual Return 2010

rr_AnnualReturn2010

35.55%

Annual Return 2011

rr_AnnualReturn2011

9.91%

Annual Return 2012

rr_AnnualReturn2012

20.58%

1 Year

rr_AverageAnnualReturnYear01

20.58%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

30.08%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2008

Open Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

19.43%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

25.69%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

13.50%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

24.08%

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.80%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

1.54%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.34%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(1.14%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.20%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

122

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

381

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

660

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,455

1 Year

rr_AverageAnnualReturnYear01

20.83%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

34.88%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 26, 2011

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2023, to the extent Total Annual Portfolio Operating Expenses exceed 1.20% and 1.50% 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.

XML

Lazard Multi-Asset Targeted Volatility Portfolio

Lazard Multi-Asset Targeted Volatility Portfolio

Investment Objective

The Portfolio seeks total return.

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 Multi-Asset Targeted Volatility 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 Multi-Asset Targeted Volatility Portfolio		Institutional Shares	Open Shares
Management Fees		0.85%	0.85%
Distribution and Service (12b-1) Fees		none	0.25%
Other Expenses	[1]	0.30%	0.35%
Total Annual Portfolio Operating Expenses		1.15%	1.45%
Fee Waiver and Expense Reimbursement	[2]	0.25%	0.25%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[2]	0.90%	1.20%

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 Multi-Asset Targeted Volatility Portfolio (USD $)	1 Year	3 Years
Institutional Shares	92	341
Open Shares	122	434

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 Investment Manager allocates the Portfolio’s assets among various US and non-US equity and fixed-income strategies managed by the Investment Manager in proportions consistent with the Investment Manager’s evaluation of various economic and other factors designed to estimate probabilities, including volatility. The Investment Manager will make allocation decisions among the strategies based on quantitative and qualitative analysis using a number of different tools, including proprietary software models and input from the Investment Manager’s research analysts. Strategy allocations will change over time.

A principal component of the Investment Manager’s investment process for the Portfolio is volatility management. The Investment Manager generally will seek to achieve, over a full market cycle, a level of volatility in the Portfolio’s performance of approximately 10%. Volatility, a risk measurement, measures the magnitude of up and down fluctuations in the value of a financial instrument or index over time.

As a consequence of allocating its assets among various of the Investment Manager’s investment strategies, the Portfolio may:

• invest in US and non-US equity and debt securities (including those of companies with business activities located in emerging market countries and securities issued by governments of such countries), depositary receipts and shares, currencies and related instruments, and structured notes

• invest in common stock of exchange-traded open-end management investment companies and similar products, which generally pursue a passive index-based strategy (commonly known as ETFs)

• invest in securities of companies of any size or market capitalization

• invest in debt securities of any maturity or duration

• invest in securities of any particular quality or investment grade and, as a result, the Portfolio may invest significantly in securities rated below investment grade (“junk bonds”) or securities that are unrated

• enter into futures contracts, swap agreements (including credit default swap agreements) and forward contracts, and may purchase and write put and covered call options, on securities, indexes and currencies, for hedging purposes (although it is not required to do so) or to seek to increase returns

Principal Investment Risks

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

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

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

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

Volatility Management Risk. While the Investment Manager generally will seek to achieve, over a full market cycle, the level of volatility in the Portfolio’s performance as described above, there can be no guarantee that this will be achieved; actual or realized volatility for any particular period may be materially higher or lower depending on market conditions. In addition, the Investment Manager’s efforts to manage the Portfolio’s volatility can be expected, in a period of generally positive equity market returns, to reduce the Portfolio’s performance below what could be achieved without seeking to manage volatility and, thus, the Portfolio would generally be expected to underperform market indices that do not seek to achieve a specified level of volatility.

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

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.

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, and, during a time of declining interest rates, the Portfolio may have to reinvest the proceeds in an investment offering a lower yield (and the Portfolio may not fully benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

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

ETF Risk. Any investments in ETFs are subject to the risks of the investments of the ETFs, as well as to the general risks of investing in ETFs. Portfolio shares will bear not only the Portfolio’s management fees and operating expenses, but also their proportional share of the management fees and operating expenses of any ETFs in which the Portfolio invests. Shares of ETFs in which the Portfolio invests may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV.

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

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

Foreign Currency Hedging Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates. The Investment Manager may not be able to accurately predict movements in exchange rates and there may be imperfect correlations between movements in exchange rates that could cause the Portfolio to incur significant losses. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

Derivatives Risk. Derivatives transactions, including those entered into for hedging purposes such as those in which the Portfolio may engage, may reduce returns or increase volatility, perhaps substantially. Swap agreements, forward currency contracts, over-the-counter options on securities, indexes and currencies and structured notes are subject to the risk of default by the counterparty and can be illiquid. These derivatives transactions, as well as the futures contracts and 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 security, index or currency. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions, even if entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

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 that 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.

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

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .90% and 1.20% 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.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Emerging Markets Debt Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

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

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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

2014-04-30

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 220% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

220.00%

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

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Portfolio invests primarily in debt securities issued or guaranteed by governments, government agencies or supranational bodies or companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds, convertible securities, commercial paper, collateralized debt obligations, short- and medium-term obligations and other fixed-income obligations, and may invest in money market instruments such as certificates of deposit. The securities in which the Portfolio invests may be denominated in the US dollar, the Canadian dollar, the Euro, the Japanese yen, the Pound Sterling, or the local currency of the issuer.

Under normal circumstances, the Portfolio invests at least 80% of its assets in debt securities that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the MSCI World Index. The Portfolio currently intends to focus its investments in Asia, Africa, the Middle East, Latin America and the developing countries of Europe, although 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.

The Portfolio is classified as “non-diversified” under 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.

The Portfolio generally will not purchase equity securities; however, the Portfolio may from time to time acquire and hold equity securities as a result of exercising a convertible debt security or holding a convertible debt security to maturity or in connection with the reorganization or bankruptcy of an issuer of a debt security held by the Portfolio.

The Portfolio may, but is not required to, purchase options on ETFs and currencies and enter into forward currency contracts and credit default swaps, for hedging purposes or to seek to increase returns.

Risk [Heading]

rr_RiskHeading

Principal Investment Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

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

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.

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 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.

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

High Portfolio Turnover Risk. The Portfolio’s investment strategy may involve high portfolio turnover (such as 100% or more). A portfolio turnover rate of 100%, for example, is equivalent to the Portfolio buying and selling all of its securities once during the course of the year. A high portfolio turnover rate could result in high 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 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 Total Returns for Institutional Shares As of 12/31

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Debt Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to that of broad measures 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 Emerging Markets Debt Portfolio by showing the Portfolio's performance for the first complete calendar year of operation compared to that of broad measures of market performance.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

(800) 823-6300

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The Portfolio's past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter:
3/31/12 7.52%

Worst Quarter:
6/30/12 -0.01%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2012

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

7.52%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Jun. 30, 2012

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(0.01%)

Performance Table Heading

rr_PerformanceTableHeading

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

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.

JPMorgan Emerging Market Bond Index Global Diversified® Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.44%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

13.66%

JPMorgan Government Bond Index – Emerging Markets Global Diversified® Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

16.76%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

7.82%

50% JPMorgan Emerging Market Bond Index Global Diversified Index/ 50% JPMorgan Government Bond Index – Emerging Markets Global Diversified Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.21%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.81%

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.80%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.23%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.03%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.03%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.00%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

102

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

325

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

566

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,257

Annual Return 2012

rr_AnnualReturn2012

18.95%

1 Year

rr_AverageAnnualReturnYear01

18.95%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.86%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 28, 2011

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

16.18%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

8.61%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

12.23%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

7.92%

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.80%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

1.92%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

2.97%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(1.67%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.30%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

132

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

433

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

756

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,671

1 Year

rr_AverageAnnualReturnYear01

18.68%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

10.54%

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 April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed 1.00% and 1.30% of the average daily net assets of the Portfolio's Institutional Shares and Open Shares, respectively, and from May 1, 2014 through April 30, 2023, to the extent Total Annual Portfolio Operating Expenses exceed 1.10% and 1.40% of the average daily net assets of the Portfolio's Institutional Shares and Open Shares, respectively. All limitations on Total Annual Portfolio Operating Expenses are 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.

XML

Lazard Emerging Markets Equity Portfolio

Lazard Emerging Markets Equity Portfolio

Investment Objective

The Portfolio seeks long-term 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard Emerging Markets Equity 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 Emerging Markets Equity Portfolio	Institutional Shares	Open Shares
Management Fees	1.00%	1.00%
Distribution and Service (12b-1) Fees	none	0.25%
Other Expenses	0.10%	0.15%
Total Annual Portfolio Operating Expenses	1.10%	1.40%

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 Emerging Markets Equity Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	112	350	606	1,340
Open Shares	143	443	766	1,680

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 23% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of non-US companies whose principal activities are located in emerging market countries and that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values.

Emerging market countries include all countries represented by the MSCI Emerging Markets® Index, which currently includes: Brazil, Chile, China, Colombia, Czech Republic, Egypt, Hungary, India, Indonesia, Korea, Malaysia, Mexico, Morocco, Peru, Philippines, Poland, Russia, South Africa, Taiwan, Thailand and Turkey.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies whose principal business activities are located in emerging market countries.

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.

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 currency fluctuations, 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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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 Emerging Markets Equity 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 34.12%

Worst Quarter:
12/31/08 -30.50%

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.

Average Annual Returns Lazard Emerging Markets Equity Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	22.36%	1.81%	18.41%	8.55%	Jul. 15, 1994
Open Shares	22.03%	1.46%	18.09%	8.57%	Jan. 08, 1997
After Taxes on Distributions Institutional Shares	21.81%	0.96%	17.13%	7.61%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	16.06%	1.37%	16.43%	7.34%
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes) (Institutional)	18.22%	(0.92%)	16.52%	6.54%
MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes) (Open)	18.22%	(0.92%)	16.52%	7.47%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard U.S. Mid Cap Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 102% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

102.00%

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. 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 invests primarily in equity securities, principally common stocks, of mid cap US companies that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Investment Manager considers “mid cap companies” to be those companies that, at the time of initial purchase by the Portfolio, have market capitalizations within the range of companies included in the Russell Midcap® Index (ranging from approximately $287.8 million to $28.0 billion as of April 9, 2013).

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of medium-size (mid cap) US companies. The Portfolio may invest up to 20% of its assets in equity securities of larger or smaller US companies. The Portfolio also may invest up to 15% of its assets in equity securities of non-US companies, including ADRs and GDRs.

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.

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

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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 currency fluctuations, 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.

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.

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 Mid Cap Equity 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 Mid Cap Equity 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 21.18%

Worst Quarter:
12/31/08 -26.54%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

21.18%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(26.54%)

Performance Table Heading

rr_PerformanceTableHeading

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

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.

Russell Midcap Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.28%

5 Years

rr_AverageAnnualReturnYear05

3.57%

10 Years

rr_AverageAnnualReturnYear10

10.65%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

7.88%

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.26%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.26%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

128

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

400

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

692

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,523

1 Year

rr_AverageAnnualReturnYear01

5.44%

5 Years

rr_AverageAnnualReturnYear05

0.76%

10 Years

rr_AverageAnnualReturnYear10

7.21%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.48%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 04, 1997

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.23%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

0.98%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

100

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

312

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

542

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,201

Annual Return 2003

rr_AnnualReturn2003

29.03%

Annual Return 2004

rr_AnnualReturn2004

24.97%

Annual Return 2005

rr_AnnualReturn2005

8.89%

Annual Return 2006

rr_AnnualReturn2006

14.85%

Annual Return 2007

rr_AnnualReturn2007

(2.93%)

Annual Return 2008

rr_AnnualReturn2008

(38.33%)

Annual Return 2009

rr_AnnualReturn2009

38.49%

Annual Return 2010

rr_AnnualReturn2010

23.43%

Annual Return 2011

rr_AnnualReturn2011

(5.58%)

Annual Return 2012

rr_AnnualReturn2012

5.76%

1 Year

rr_AverageAnnualReturnYear01

5.76%

5 Years

rr_AverageAnnualReturnYear05

1.03%

10 Years

rr_AverageAnnualReturnYear10

7.50%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.79%

Inception Date

rr_AverageAnnualReturnInceptionDate

Nov. 04, 1997

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

5.71%

5 Years

rr_AverageAnnualReturnYear05

0.89%

10 Years

rr_AverageAnnualReturnYear10

6.66%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.26%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

3.80%

5 Years

rr_AverageAnnualReturnYear05

0.85%

10 Years

rr_AverageAnnualReturnYear10

6.32%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.11%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Global Listed Infrastructure Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks total return.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

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

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. 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 invests primarily in equity securities, principally common stocks, of infrastructure companies and concentrates its investments in industries represented by infrastructure companies. The Investment Manager focuses on companies with a minimum market capitalization of $250 million that own physical infrastructure and which the Investment Manager believes are undervalued.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of infrastructure companies, which consist of utilities, pipelines, toll roads, airports, railroads, ports, telecommunications and other infrastructure companies, with securities listed on a national or other recognized securities exchange.

Under normal market conditions, the Portfolio invests significantly (at least 40%—unless market conditions are not deemed favorable by the Investment Manager, in which case the Portfolio would invest at least 30%) in infrastructure companies organized or located outside the US or doing a substantial amount of business outside the US. The Investment Manager allocates the Portfolio’s assets among various regions and countries, including the United States (but in no less than three different countries). The Portfolio may invest in equity securities of companies with some business activities located in emerging market countries.

The Investment Manager generally seeks to substantially hedge foreign currency exposure in the Portfolio back to the US dollar by entering into foreign currency forward contracts, although the Portfolio’s total foreign currency exposure may not be fully hedged at all times.

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.

Infrastructure Companies Risk. Securities and instruments of infrastructure companies are more susceptible to adverse economic or regulatory occurrences affecting their industries. Infrastructure companies may be subject to a variety of factors that may adversely affect their business or operations, including high interest costs in connection with capital construction programs, high leverage, costs associated with environmental and other regulations, the effects of economic slowdown, surplus capacity, increased competition from other providers of services, uncertainties concerning the availability of fuel at reasonable prices, the effects of energy conservation policies and other factors. Infrastructure companies also may be affected by or subject to:

• regulation by various government authorities, including rate regulation;

• service interruption due to environmental, operational or other mishaps;

• the imposition of special tariffs and changes in tax laws, regulatory policies and accounting standards; and

• general changes in market sentiment towards infrastructure and utilities 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 currency fluctuations, 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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Foreign Currency Hedging Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates. The Investment Manager may not be able to accurately predict movements in exchange rates and there may be imperfect correlations between movements in exchange rates that could cause the Portfolio to incur significant losses. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

Forward Currency Contract Risk. Forward currency contracts may reduce returns or increase volatility, perhaps substantially. Forward currency contracts are subject to the risk of default by the counterparty to the contracts and can be illiquid. These contracts are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related currency. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of forward currency contracts, even when entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Larger Cap Companies Risk. The securities of large market cap companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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 Global Listed Infrastructure Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to that of broad measures of market performance. The bar chart shows how the performance of the Portfolio’s Institutional Shares has varied from year to year. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Global Listed Infrastructure Portfolio by showing the Portfolio's year-by-year performance and its average annual performance compared to that of broad measures 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]

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Best Quarter:
9/30/10 12.17%

Worst Quarter:
9/30/11 -9.85%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Sep. 30, 2010

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

12.17%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(9.85%)

Performance Table Heading

rr_PerformanceTableHeading

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

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.

UBS Global 50/50 Infrastructure & Utilities® Index (Hedged) (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

12.38%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.10%

Morgan Stanley Capital International® World Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

15.83%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.93%

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.90%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.24%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.14%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

116

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

362

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

628

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,386

Annual Return 2010

rr_AnnualReturn2010

6.63%

Annual Return 2011

rr_AnnualReturn2011

(1.55%)

Annual Return 2012

rr_AnnualReturn2012

18.05%

1 Year

rr_AverageAnnualReturnYear01

18.05%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

7.40%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2009

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

17.62%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.96%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

13.33%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.50%

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.90%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.35%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.50%

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

153

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

474

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

818

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,791

1 Year

rr_AverageAnnualReturnYear01

17.54%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.99%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2009

XML

Lazard Emerging Markets Debt Portfolio

Lazard Emerging Markets Debt 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard Emerging Markets Debt 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 Emerging Markets Debt Portfolio		Institutional Shares	Open Shares
Management Fees		0.80%	0.80%
Distribution and Service (12b-1) Fees		none	0.25%
Other Expenses		0.23%	1.92%
Total Annual Portfolio Operating Expenses		1.03%	2.97%
Fee Waiver and Expense Reimbursement	[1]	0.03%	1.67%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	1.00%	1.30%

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

Expense Example Lazard Emerging Markets Debt Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	102	325	566	1,257
Open Shares	132	433	756	1,671

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 220% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in debt securities issued or guaranteed by governments, government agencies or supranational bodies or companies or other private-sector entities, including fixed and/or floating rate investment grade and non-investment grade bonds, convertible securities, commercial paper, collateralized debt obligations, short- and medium-term obligations and other fixed-income obligations, and may invest in money market instruments such as certificates of deposit. The securities in which the Portfolio invests may be denominated in the US dollar, the Canadian dollar, the Euro, the Japanese yen, the Pound Sterling, or the local currency of the issuer.

Under normal circumstances, the Portfolio invests at least 80% of its assets in debt securities that are economically tied to emerging market countries. Emerging market countries include all countries not represented by the MSCI World Index. The Portfolio currently intends to focus its investments in Asia, Africa, the Middle East, Latin America and the developing countries of Europe, although 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.

The Portfolio is classified as “non-diversified” under 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.

The Portfolio generally will not purchase equity securities; however, the Portfolio may from time to time acquire and hold equity securities as a result of exercising a convertible debt security or holding a convertible debt security to maturity or in connection with the reorganization or bankruptcy of an issuer of a debt security held by the Portfolio.

The Portfolio may, but is not required to, purchase options on ETFs and currencies and enter into forward currency contracts and credit default swaps, for hedging purposes or to seek to increase returns.

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.

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 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.

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

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

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 Emerging Markets Debt Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to that of broad measures 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:
3/31/12 7.52%

Worst Quarter:
6/30/12 -0.01%

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.

Average Annual Returns Lazard Emerging Markets Debt Portfolio	1 Year	Life of Portfolio	Inception Date
Institutional Shares	18.95%	10.86%	Feb. 28, 2011
Open Shares	18.68%	10.54%	Feb. 28, 2011
After Taxes on Distributions Institutional Shares	16.18%	8.61%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	12.23%	7.92%
JPMorgan Emerging Market Bond Index Global Diversified® Index (reflects no deduction for fees, expenses or taxes)	17.44%	13.66%
JPMorgan Government Bond Index – Emerging Markets Global Diversified® Index (reflects no deduction for fees, expenses or taxes)	16.76%	7.82%
50% JPMorgan Emerging Market Bond Index Global Diversified Index/ 50% JPMorgan Government Bond Index – Emerging Markets Global Diversified Index (reflects no deduction for fees, expenses or taxes)	17.21%	10.81%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed 1.00% and 1.30% of the average daily net assets of the Portfolio's Institutional Shares and Open Shares, respectively, and from May 1, 2014 through April 30, 2023, to the extent Total Annual Portfolio Operating Expenses exceed 1.10% and 1.40% of the average daily net assets of the Portfolio's Institutional Shares and Open Shares, respectively. All limitations on Total Annual Portfolio Operating Expenses are 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.

XML

Document and Entity Information	0 Months Ended
	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	Apr. 26, 2013
Document Effective Date	May 01, 2013
Prospectus Date	May 01, 2013

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Multi-Asset Targeted Volatility Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks total return.

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

2014-04-30

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, 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

The Investment Manager allocates the Portfolio’s assets among various US and non-US equity and fixed-income strategies managed by the Investment Manager in proportions consistent with the Investment Manager’s evaluation of various economic and other factors designed to estimate probabilities, including volatility. The Investment Manager will make allocation decisions among the strategies based on quantitative and qualitative analysis using a number of different tools, including proprietary software models and input from the Investment Manager’s research analysts. Strategy allocations will change over time.

A principal component of the Investment Manager’s investment process for the Portfolio is volatility management. The Investment Manager generally will seek to achieve, over a full market cycle, a level of volatility in the Portfolio’s performance of approximately 10%. Volatility, a risk measurement, measures the magnitude of up and down fluctuations in the value of a financial instrument or index over time.

As a consequence of allocating its assets among various of the Investment Manager’s investment strategies, the Portfolio may:

• invest in US and non-US equity and debt securities (including those of companies with business activities located in emerging market countries and securities issued by governments of such countries), depositary receipts and shares, currencies and related instruments, and structured notes

• invest in common stock of exchange-traded open-end management investment companies and similar products, which generally pursue a passive index-based strategy (commonly known as ETFs)

• invest in securities of companies of any size or market capitalization

• invest in debt securities of any maturity or duration

• invest in securities of any particular quality or investment grade and, as a result, the Portfolio may invest significantly in securities rated below investment grade (“junk bonds”) or securities that are unrated

• enter into futures contracts, swap agreements (including credit default swap agreements) and forward contracts, and may purchase and write put and covered call options, on securities, indexes and currencies, for hedging purposes (although it is not required to do so) or to seek to increase returns

Risk [Heading]

rr_RiskHeading

Principal Investment Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

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

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

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

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

Volatility Management Risk. While the Investment Manager generally will seek to achieve, over a full market cycle, the level of volatility in the Portfolio’s performance as described above, there can be no guarantee that this will be achieved; actual or realized volatility for any particular period may be materially higher or lower depending on market conditions. In addition, the Investment Manager’s efforts to manage the Portfolio’s volatility can be expected, in a period of generally positive equity market returns, to reduce the Portfolio’s performance below what could be achieved without seeking to manage volatility and, thus, the Portfolio would generally be expected to underperform market indices that do not seek to achieve a specified level of volatility.

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

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.

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, and, during a time of declining interest rates, the Portfolio may have to reinvest the proceeds in an investment offering a lower yield (and the Portfolio may not fully benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

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

ETF Risk. Any investments in ETFs are subject to the risks of the investments of the ETFs, as well as to the general risks of investing in ETFs. Portfolio shares will bear not only the Portfolio’s management fees and operating expenses, but also their proportional share of the management fees and operating expenses of any ETFs in which the Portfolio invests. Shares of ETFs in which the Portfolio invests may trade at prices that vary from their NAVs, sometimes significantly. The shares of ETFs may trade at prices at, below or above their most recent NAV.

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

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

Foreign Currency Hedging Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates. The Investment Manager may not be able to accurately predict movements in exchange rates and there may be imperfect correlations between movements in exchange rates that could cause the Portfolio to incur significant losses. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of emerging market currencies.

Derivatives Risk. Derivatives transactions, including those entered into for hedging purposes such as those in which the Portfolio may engage, may reduce returns or increase volatility, perhaps substantially. Swap agreements, forward currency contracts, over-the-counter options on securities, indexes and currencies and structured notes are subject to the risk of default by the counterparty and can be illiquid. These derivatives transactions, as well as the futures contracts and 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 security, index or currency. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions, even if entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

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

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 that 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

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.30%

^[1]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.15%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.25%)

^[2]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.90%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

92

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

341

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.85%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.35%

^[1]

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.45%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.25%)

^[2]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.20%

^[2]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

122

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

434

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

[2] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .90% and 1.20% 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.

XML

Lazard U.S. Small-Mid Cap Equity Portfolio

Lazard U.S. Small-Mid Cap Equity Portfolio

Investment Objective

The Portfolio seeks long-term 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard U.S. Small-Mid Cap Equity 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 U.S. Small-Mid Cap Equity Portfolio	Institutional Shares	Open Shares
Management Fees	0.75%	0.75%
Distribution and Service (12b-1) Fees	none	0.25%
Other Expenses	0.13%	0.21%
Total Annual Portfolio Operating Expenses	0.88%	1.21%

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 U.S. Small-Mid Cap Equity Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	90	281	488	1,084
Open Shares	123	384	665	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 92% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of small to mid capitalization US companies. The Investment Manager considers “small-mid cap companies” to be those companies that, at the time of initial purchase by the Portfolio, have market capitalizations within the range of companies included in the Russell 2500^® Index (ranging from approximately $18.5 million to $10.9 billion as of April 9, 2013).

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of small-mid cap US companies. The Investment Manager focuses on relative value in seeking to construct a diversified portfolio of investments for the Portfolio that maintains sector and industry balance, using investment opportunities identified through bottom-up fundamental research conducted by the Investment Manager’s small cap, mid cap and global research analysts.

The Portfolio may invest up to 20% of its assets in equity securities of larger US companies and may invest up to 10% of its total assets in equity securities of non-US companies, including ADRs and GDRs.

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.

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

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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 currency fluctuations, 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.

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 Small-Mid Cap Equity 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 28.30%

Worst Quarter:
9/30/11 -26.02%

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. The Russell 2000/2500 Linked Index shown in the table is an unmanaged index created by the Investment Manager, which links the performance of the Russell 2000® Index for all periods through August 24, 2008 (when the Portfolio’s investment focus was changed from small cap companies to small-mid cap companies) and the Russell 2500 Index for all periods thereafter.

Average Annual Returns Lazard U.S. Small-Mid Cap Equity Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	15.45%	5.58%	9.16%	10.33%	Oct. 30, 1991
Open Shares	14.97%	5.22%	8.81%	6.89%	Jan. 30, 1997
After Taxes on Distributions Institutional Shares	14.99%	4.96%	7.23%	8.10%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	10.64%	4.56%	7.35%	8.13%
Russell 2500 Index (reflects no deduction for fees, expenses or taxes) (Institutional)	17.88%	4.34%	10.49%	10.39%
Russell 2500 Index (reflects no deduction for fees, expenses or taxes) (Open)	17.88%	4.34%	10.49%	8.28%
Russell 2000/2500 Linked Index (reflects no deduction for fees, expenses or taxes) (Institutional)	17.88%	4.78%	10.36%	9.30%
Russell 2000/2500 Linked Index (reflects no deduction for fees, expenses or taxes) (Open)	17.88%	4.78%	10.36%	7.15%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard U.S. Strategic Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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

2014-04-30

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 60% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

60.00%

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

The Portfolio invests primarily in equity securities, principally common stocks, of US companies that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. Although the Portfolio generally focuses on large cap companies, the market capitalizations of issuers in which the Portfolio invests may vary with market conditions and the Portfolio also may invest in mid cap and small cap companies.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of US companies. The Portfolio may invest up to 15% of its total assets in securities of non-US companies, including American Depositary Receipts (“ADRs”) and Global Depositary Receipts (“GDRs”).

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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Larger Cap Companies Risk. The securities of large market cap companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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

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 currency fluctuations, 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.

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

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Strategic Equity 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 16.46%

Worst Quarter:
12/31/08 -23.06%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

16.46%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(23.06%)

Performance Table Heading

rr_PerformanceTableHeading

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

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.

S&P 500 Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

16.00%

5 Years

rr_AverageAnnualReturnYear05

1.66%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.20%

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.70%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.42%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.37%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.32%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.05%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

107

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

402

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

719

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,618

1 Year

rr_AverageAnnualReturnYear01

14.10%

5 Years

rr_AverageAnnualReturnYear05

1.42%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.50%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 30, 2004

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.70%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.29%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

0.99%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.24%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

0.75%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

77

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

291

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

524

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,191

Annual Return 2005

rr_AnnualReturn2005

4.99%

Annual Return 2006

rr_AnnualReturn2006

17.44%

Annual Return 2007

rr_AnnualReturn2007

0.33%

Annual Return 2008

rr_AnnualReturn2008

(35.43%)

Annual Return 2009

rr_AnnualReturn2009

28.12%

Annual Return 2010

rr_AnnualReturn2010

13.13%

Annual Return 2011

rr_AnnualReturn2011

1.65%

Annual Return 2012

rr_AnnualReturn2012

14.56%

1 Year

rr_AverageAnnualReturnYear01

14.56%

5 Years

rr_AverageAnnualReturnYear05

1.73%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.80%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 30, 2004

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

14.17%

5 Years

rr_AverageAnnualReturnYear05

1.49%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.11%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

9.96%

5 Years

rr_AverageAnnualReturnYear05

1.43%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

3.08%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed .75% and 1.05% 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.

XML

Lazard U.S. Mid Cap Equity Portfolio

Lazard U.S. Mid Cap Equity Portfolio

Investment Objective

The Portfolio seeks long-term 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard U.S. Mid Cap Equity 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 U.S. Mid Cap Equity Portfolio	Institutional Shares	Open Shares
Management Fees	0.75%	0.75%
Distribution and Service (12b-1) Fees	none	0.25%
Other Expenses	0.23%	0.26%
Total Annual Portfolio Operating Expenses	0.98%	1.26%

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

Expense Example Lazard U.S. Mid Cap Equity Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	100	312	542	1,201
Open Shares	128	400	692	1,523

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 102% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of mid cap US companies that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Investment Manager considers “mid cap companies” to be those companies that, at the time of initial purchase by the Portfolio, have market capitalizations within the range of companies included in the Russell Midcap® Index (ranging from approximately $287.8 million to $28.0 billion as of April 9, 2013).

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of medium-size (mid cap) US companies. The Portfolio may invest up to 20% of its assets in equity securities of larger or smaller US companies. The Portfolio also may invest up to 15% of its assets in equity securities of non-US companies, including ADRs and GDRs.

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.

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

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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 currency fluctuations, 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.

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 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 Mid Cap Equity 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 21.18%

Worst Quarter:
12/31/08 -26.54%

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.

Average Annual Returns Lazard U.S. Mid Cap Equity Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	5.76%	1.03%	7.50%	6.79%	Nov. 04, 1997
Open Shares	5.44%	0.76%	7.21%	6.48%	Nov. 04, 1997
After Taxes on Distributions Institutional Shares	5.71%	0.89%	6.66%	5.26%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	3.80%	0.85%	6.32%	5.11%
Russell Midcap Index (reflects no deduction for fees, expenses or taxes)	17.28%	3.57%	10.65%	7.88%

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard International Small Cap Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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

2014-04-30

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 48% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

48.00%

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

The Portfolio invests primarily in equity securities, principally common stocks, of relatively small non-US companies that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Investment Manager considers “small non-US companies” to be those non-US companies with market capitalizations, at the time of initial purchase by the Portfolio, below $5 billion or in the range of the smallest 10% of companies included in the MSCI EAFE Index (based on market capitalization of the Index as a whole, which ranged from approximately $498.5 million to $232.6 billion as of April 9, 2013).

In choosing stocks for the Portfolio, the Investment Manager looks for smaller, well-managed non-US companies that the Investment Manager believes have the potential for growth. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of small cap companies.

The Portfolio may invest up to 25% of its assets in securities of companies whose principal business activities are located in emerging market countries, although the allocation of the Portfolio’s assets to emerging market countries may vary from time to time.

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.

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

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 currency fluctuations, 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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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 International Small Cap Equity 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 International Small Cap Equity 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 31.53%

Worst Quarter:
12/31/08 -27.07%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

31.53%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Dec. 31, 2008

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(27.07%)

Performance Table Heading

rr_PerformanceTableHeading

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

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.

MSCI EAFE Small Cap Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

20.00%

5 Years

rr_AverageAnnualReturnYear05

(0.87%)

10 Years

rr_AverageAnnualReturnYear10

11.93%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.76%

MSCI EAFE Small Cap Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

20.00%

5 Years

rr_AverageAnnualReturnYear05

(0.87%)

10 Years

rr_AverageAnnualReturnYear10

11.93%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.99%

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.48%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.48%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.43%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

146

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

463

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

803

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,764

1 Year

rr_AverageAnnualReturnYear01

21.96%

5 Years

rr_AverageAnnualReturnYear05

(2.23%)

10 Years

rr_AverageAnnualReturnYear10

8.65%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.04%

Inception Date

rr_AverageAnnualReturnInceptionDate

Feb. 13, 1997

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.43%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.18%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.05%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.13%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

115

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

370

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

644

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,427

Annual Return 2003

rr_AnnualReturn2003

42.21%

Annual Return 2004

rr_AnnualReturn2004

32.28%

Annual Return 2005

rr_AnnualReturn2005

14.77%

Annual Return 2006

rr_AnnualReturn2006

26.31%

Annual Return 2007

rr_AnnualReturn2007

(4.61%)

Annual Return 2008

rr_AnnualReturn2008

(49.84%)

Annual Return 2009

rr_AnnualReturn2009

39.17%

Annual Return 2010

rr_AnnualReturn2010

23.55%

Annual Return 2011

rr_AnnualReturn2011

(14.11%)

Annual Return 2012

rr_AnnualReturn2012

22.28%

1 Year

rr_AverageAnnualReturnYear01

22.28%

5 Years

rr_AverageAnnualReturnYear05

(1.96%)

10 Years

rr_AverageAnnualReturnYear10

8.95%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.59%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 01, 1993

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

21.95%

5 Years

rr_AverageAnnualReturnYear05

(2.29%)

10 Years

rr_AverageAnnualReturnYear10

7.34%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.39%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

15.35%

5 Years

rr_AverageAnnualReturnYear05

(1.60%)

10 Years

rr_AverageAnnualReturnYear10

8.03%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.71%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed 1.13% and 1.43% 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.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard International Realty Equity Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objectives

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio’s primary investment objective is long-term capital appreciation,

Objective, Secondary [Text Block]

rr_ObjectiveSecondaryTextBlock

with current income, including interest and dividends from portfolio securities, as a secondary objective.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

rr_OperatingExpensesCaption

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

Fee Waiver or Reimbursement over Assets, Date of Termination

rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination

2016-04-30

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 period, the Portfolio’s portfolio turnover rate was 42% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

42.00%

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

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities (including common, convertible and preferred stocks) of non-US Realty Companies (defined below), as well as certain synthetic instruments relating to non-US Realty Companies. Such synthetic instruments are investments that have economic characteristics similar to the Portfolio’s direct investments in non-US Realty Companies and may include depositary receipts, including ADRs, GDRs and European Depositary Receipts, warrants, rights, options and shares of ETFs. The Portfolio’s investments in non-US companies may include securities of companies whose principal business activities are located in emerging market countries.

The Investment Manager conducts proprietary quantitative, qualitative and on-site real estate analysis to select the Portfolio’s investments, which may include, as appropriate, research at the macroeconomic, sector, company and property level. The Investment Manager’s individual company research may consider a number of quantitative measures, including earnings growth potential, price to earnings or free cash flow multiples, price to NAV ratios, dividend yield and potential for growth, return on equity and return on assets, as well as qualitative factors such as overall business and growth strategy and quality of management.

“Realty Companies” are real estate-related companies of any size including, but not limited to, REITs, real estate operating or service companies and companies in the homebuilding, lodging and hotel industries, as well as companies engaged in the healthcare, gaming, retailing, restaurant, natural resources and utility industries, and other companies whose investments, balance sheets or income statements are real-estate intensive (i.e., the company’s actual or anticipated revenues, profits, assets, services or products are related to real estate including, but not limited to, the ownership, renting, leasing, construction, management, development or financing of commercial, industrial or residential real estate).

The Portfolio may invest in issuers of any market capitalization and securities of any maturity, and the Portfolio’s investments also may include securities purchased in IPOs.

The Portfolio is classified as “non-diversified” under 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.

The Portfolio also may invest up to 20% of its assets in equity and fixed income securities and instruments of companies or entities (which need not be non-US Realty Companies), including, but not limited to, other investment companies and collective investment funds.

The Portfolio’s investments in preferred stock and convertible and fixed income securities may include securities which, at the time of purchase, are rated below “investment grade” by an NRSRO, or the unrated equivalent as determined by the Investment Manager (“junk bonds”).

The Portfolio may, but is not required to, enter into forward currency contracts and write put and covered call options on securities and indexes, for hedging purposes or to seek to increase returns.

Risk [Heading]

rr_RiskHeading

Principal Investment Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

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

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.

Equity Securities Risks. While stocks have historically been a leading choice of long-term investors, they do fluctuate in price, often based on factors unrelated to the issuer’s value, such as investor perception. Preferred stock is subject to credit and interest rate risk (described below) and the risk that the dividend on the stock may be changed or omitted by the issuer and, unlike common stock, participation in the growth of an issuer may be limited. The market value of a convertible security tends to perform like that of a regular debt security so that, if market interest rates rise, the value of the convertible security falls. Investments in warrants involve certain risks, including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the warrant can be prudently exercised, in which case the warrant may expire without being exercised and result in a loss of the Portfolio’s entire investment.

Realty Companies Risk. Since the Portfolio focuses its investments in Realty Companies, the Portfolio could lose money due to the performance of real estate-related securities even if securities markets generally are experiencing positive results. The performance of investments made by the Portfolio may be determined to a great extent by the current status of the real estate industry in general, or by other factors (such as interest rates and the availability of loan capital) that may affect the real estate industry, even if other industries would not be so affected. Consequently, the investment strategies of the Portfolio could lead to securities investment results that may be significantly different from investments in securities of other industries or sectors or in a more broad-based portfolio generally.

The risks related to investments in Realty Companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing. An investment in REITs may be adversely affected or lost if the REIT fails to comply with applicable laws and regulations. If the Portfolio invests in a REIT that subsequently fails to qualify as a REIT under the Code, it is highly likely that the REIT will be subject to a substantial additional income tax liability that could cause it to liquidate investments, borrow funds under adverse conditions or, possibly, fail.

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

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 currency fluctuations, 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.

Foreign Currency Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates.

Non-Diversification Risk. Because the Portfolio may invest in a smaller number of issuers than other, more diversified investment portfolios, the Portfolio’s 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.

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 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. If there is a decline, or 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. Junk bonds tend to be more volatile, less liquid and are considered speculative. During unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like. Some fixed-income securities may give the issuer the option to call, or redeem, the securities before their maturity, and, during a time of lower or declining interest rates, the Portfolio may have to reinvest the proceeds in lower yielding securities (and the Portfolio may not benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

Derivatives Risk. Derivatives transactions, including those entered into for hedging purposes, may reduce returns or increase volatility, perhaps substantially. Forward currency contracts and over-the-counter options on securities and indexes are subject to the risk of default by the counterparty and can be illiquid. These derivative transactions as well as 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 security or currency. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Purchasing options will reduce returns by the amount of premiums paid for options that are not exercised. Use of derivatives transactions, even if entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

Investment Companies and ETF Risk. Any investments in other investment companies, collective investment funds and ETFs are subject to the risks of the investments of the investment companies, collective investment funds and ETFs, as well as to the general risks of investing in investment companies, collective investment funds and ETFs. Portfolio shares will bear not only the Portfolio’s management fees and operating expenses, but also their proportional share of the management fees and operating expenses of the other investment companies, collective investment funds and ETFs in which the Portfolio invests.

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 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 Year-by-Year Total Returns for Open 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 International Realty Equity 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 Portfolio commenced operations after all of the assets of an investment company advised by Alesco, Grubb & Ellis AGA International Realty Fund (the “Predecessor International Realty Fund”), were transferred to the Portfolio in exchange for Open Shares of the Portfolio in a tax-free reorganization on September 23, 2011. The bar chart shows how the performance of the Portfolio’s Open Shares (or the Predecessor International Realty Fund’s Class A shares, prior to September 23, 2011) has varied from year to year. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The accompanying bar chart and table provide some indication of the risks of investing in Lazard International Realty Equity 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 31.31%

Worst Quarter:
9/30/11 -22.48%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Jun. 30, 2009

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

31.31%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(22.48%)

Performance Table Heading

rr_PerformanceTableHeading

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

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 will 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.

FTSE EPRA/NAREIT Global ex-US Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

38.98%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

18.58%

FTSE EPRA/NAREIT Global ex-US Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

38.98%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

31.12%

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.90%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

4.98%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

6.13%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(4.53%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.60%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

163

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

505

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,845

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

5,065

Annual Return 2009

rr_AnnualReturn2009

89.06%

Annual Return 2010

rr_AnnualReturn2010

11.46%

Annual Return 2011

rr_AnnualReturn2011

(20.35%)

Annual Return 2012

rr_AnnualReturn2012

44.81%

1 Year

rr_AverageAnnualReturnYear01

44.81%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

24.84%

Inception Date

rr_AverageAnnualReturnInceptionDate

Dec. 31, 2008

Open Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

43.16%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

21.91%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

29.33%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

20.35%

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.90%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

4.94%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

5.84%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(4.54%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.30%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

132

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

412

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

1,704

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

4,839

1 Year

rr_AverageAnnualReturnYear01

45.14%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

34.34%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 26, 2011

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2016, to the extent Total Annual Portfolio Operating Expenses exceed 1.30% and 1.60% 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.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Emerging Markets Equity Blend Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

The Portfolio seeks long-term capital appreciation.

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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

2014-04-30

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 57% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

57.00%

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

The Portfolio invests primarily in equity securities, including common stocks, ADRs and GDRs, of non-US companies whose principal activities are located in emerging market countries.

Emerging market countries include all countries represented by the MSCI Emerging Markets Index, which currently includes: Brazil, Chile, China, Colombia, Czech Republic, Egypt, Hungary, India, Indonesia, Korea, Malaysia, Mexico, Morocco, Peru, Philippines, Poland, Russia, South Africa, Taiwan, Thailand and Turkey.

The Investment Manager allocates the Portfolio’s assets between versions of the Investment Manager’s emerging markets relative value and relative growth investment strategies. In the emerging markets relative value strategy, assets are invested in companies that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. In the emerging markets relative growth strategy, the Investment Manager employs a relative growth investment philosophy that is based on value creation through the process of bottom-up stock selection. The Investment Manager’s approach consists of an analytical framework, accounting validation, fundamental analysis and portfolio construction parameters. The Investment Manager’s selection process focuses on growth and considers the sustainability of growth and the trade off between valuation and growth. A premium may be paid for higher, sustainable growth. The Portfolio may invest in companies of any size or market capitalization.

The Investment Manager currently intends to maintain an allocation of approximately 40%-60% of the Portfolio’s assets in each strategy, but the allocation ranges could change in the future without prior notice to shareholders. The Investment Manager will make allocation decisions between the strategies based on quantitative and qualitative analysis through proprietary software models. Quantitative analysis includes, among others, statistical analysis of portfolio risks, factor dependencies and trading tendencies. Qualitative analysis includes, among others, analysis of the global economic environment as well as internal and external research on individual securities, portfolio holdings, attribution factors, behavioral patterns and overall market views and scenarios. The Investment Manager will periodically review the allocation of Portfolio assets between the strategies and modify the relative weightings to emphasize risk or to seek to mitigate risk exposures.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of companies whose principal business activities are located in emerging market countries.

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.

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 currency fluctuations, 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.

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

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

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

Risk Lose Money [Text]

rr_RiskLoseMoney

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

Bar Chart and Performance Table [Heading]

rr_BarChartAndPerformanceTableHeading

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

Performance Narrative [Text Block]

rr_PerformanceNarrativeTextBlock

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

Performance Information Illustrates Variability of Returns [Text]

rr_PerformanceInformationIllustratesVariabilityOfReturns

The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Equity Blend Portfolio by showing the Portfolio's year-by-year performance and its average annual performance compared to that of a broad measure of market performance.

Performance Availability Phone [Text]

rr_PerformanceAvailabilityPhone

(800) 823-6300

Performance Availability Website Address [Text]

rr_PerformanceAvailabilityWebSiteAddress

www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

rr_PerformancePastDoesNotIndicateFuture

The Portfolio's past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Bar Chart Closing [Text Block]

rr_BarChartClosingTextBlock

Best Quarter:
3/31/12 17.59%

Worst Quarter:
9/30/11 -24.35%

Highest Quarterly Return, Label

rr_HighestQuarterlyReturnLabel

Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2012

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

17.59%

Lowest Quarterly Return, Label

rr_LowestQuarterlyReturnLabel

Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Sep. 30, 2011

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(24.35%)

Performance Table Heading

rr_PerformanceTableHeading

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

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.

MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

18.22%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

7.75%

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

0.34%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.34%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.04%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.30%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

132

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

421

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

730

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,609

Annual Return 2011

rr_AnnualReturn2011

(20.43%)

Annual Return 2012

rr_AnnualReturn2012

18.19%

1 Year

rr_AverageAnnualReturnYear01

18.19%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.32%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 28, 2010

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

18.19%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.20%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

12.21%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.43%

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

0.52%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.77%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.17%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.60%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

163

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

541

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

943

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

2,070

1 Year

rr_AverageAnnualReturnYear01

17.97%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

6.02%

Inception Date

rr_AverageAnnualReturnInceptionDate

May 28, 2010

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed 1.30% and 1.60% 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.

XML

Label

Element

Value

Risk/Return:

rr_RiskReturnAbstract

Risk/Return [Heading]

rr_RiskReturnHeading

Lazard Emerging Markets Multi-Strategy Portfolio

Objective [Heading]

rr_ObjectiveHeading

Investment Objective

Objective, Primary [Text Block]

rr_ObjectivePrimaryTextBlock

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

Expense [Heading]

rr_ExpenseHeading

Fees and Expenses

Expense Narrative [Text Block]

rr_ExpenseNarrativeTextBlock

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

Shareholder Fees Caption [Text]

rr_ShareholderFeesCaption

Shareholder 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

2023-04-30

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 160% of the average value of its portfolio.

Portfolio Turnover, Rate

rr_PortfolioTurnoverRate

160.00%

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

Strategy [Heading]

rr_StrategyHeading

Principal Investment Strategies

Strategy Narrative [Text Block]

rr_StrategyNarrativeTextBlock

The Investment Manager allocates the Portfolio’s assets among various emerging markets equity, debt and currency investment strategies managed by the Investment Manager in proportions consistent with the Investment Manager’s evaluation of various economic and other factors through quantitative and qualitative analysis. These proportions are changed from time to time, and at any given time the allocation to one strategy (other than currency investments) may comprise a substantial percentage of the Portfolio’s assets. The Investment Manager will make allocation decisions among the strategies based on quantitative and qualitative analysis using a number of different tools, including proprietary software models. Quantitative analysis includes, among others, statistical analysis of portfolio risks, factor dependencies and trading tendencies. Qualitative analysis includes, among others, analysis of the global economic environment as well as internal and external research on individual securities, portfolio holdings, attribution factors, behavioral patterns and overall market views and scenarios.

The Portfolio may invest in:

• equity securities, including common stocks and depositary receipts and shares

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

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

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

The Portfolio may invest in securities of any size or market capitalization. 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 (“junk bonds”) or securities that are unrated. Additionally, the Portfolio is not restricted to investments in debt securities of any particular maturity or duration.

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

Risk [Heading]

rr_RiskHeading

Principal Investment Risks

Risk Narrative [Text Block]

rr_RiskNarrativeTextBlock

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

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

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

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

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.

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

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

Fixed-Income and Debt Securities Risk. 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, and, during a time of declining interest rates, the Portfolio may have to reinvest the proceeds in an investment offering a lower yield (and the Portfolio may not benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

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

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

Foreign Currency Hedging Risk. Irrespective of any foreign currency exposure hedging, the Portfolio may experience a decline in the value of its portfolio securities, in US dollar terms, due solely to fluctuations in currency exchange rates. The Investment Manager may not be able to accurately predict movements in exchange rates and there may be imperfect correlations between movements in exchange rates that could cause the Portfolio to incur significant losses. Currency investments could be adversely affected by delays in, or a refusal to grant, repatriation of funds or conversion of 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, over-the-counter options on securities (including options on ETFs) and currencies, structured notes and swap agreements are subject to the risk of default by the counterparty and can be illiquid. These derivatives transactions, as well as the exchange-traded options in which the Portfolio may invest, are subject to many of the risks of, and can be highly sensitive to changes in the value of, the related currency, security or other reference asset. As such, a small investment could have a potentially large impact on the Portfolio’s performance. Use of derivatives transactions, even if entered into for hedging purposes, may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions.

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

Risk Lose Money [Text]

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

Bar Chart and Performance Table [Heading]

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

Performance Narrative [Text Block]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard Emerging Markets Multi-Strategy Portfolio by showing the Portfolio’s performance for the first complete calendar year of operation compared to that 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 Emerging Markets Multi-Strategy Portfolio by showing the Portfolio's performance for the first complete calendar year of operation compared to that of a broad measure of market performance.

Performance Availability Phone [Text]

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(800) 823-6300

Performance Availability Website Address [Text]

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www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

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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]

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Best Quarter:
3/31/12 12.14%

Worst Quarter:
6/30/12 -5.62%

Highest Quarterly Return, Label

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Best Quarter:

Highest Quarterly Return, Date

rr_BarChartHighestQuarterlyReturnDate

Mar. 31, 2012

Highest Quarterly Return

rr_BarChartHighestQuarterlyReturn

12.14%

Lowest Quarterly Return, Label

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Worst Quarter:

Lowest Quarterly Return, Date

rr_BarChartLowestQuarterlyReturnDate

Jun. 30, 2012

Lowest Quarterly Return

rr_BarChartLowestQuarterlyReturn

(5.62%)

Performance Table Heading

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

Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deduction for fees, expenses or taxes)

Performance Table Uses Highest Federal Rate

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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

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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.

Performance Table Narrative

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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.

MSCI Emerging Markets Index (reflects no deduction for fees, expenses or taxes)

Risk/Return:

rr_RiskReturnAbstract

1 Year

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18.22%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(3.18%)

Open Shares

Risk/Return:

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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

2.57%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

3.82%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(2.22%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.60%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

163

Expense Example, with Redemption, 3 Years

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505

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

871

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,900

1 Year

rr_AverageAnnualReturnYear01

13.28%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(1.26%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 31, 2011

Institutional Shares

Risk/Return:

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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

0.57%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.57%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.27%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.30%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

132

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

412

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

713

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,568

Annual Return 2012

rr_AnnualReturn2012

14.02%

1 Year

rr_AverageAnnualReturnYear01

14.02%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(0.97%)

Inception Date

rr_AverageAnnualReturnInceptionDate

Mar. 31, 2011

Institutional Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

13.94%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(1.07%)

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

9.32%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

(0.82%)

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2023, to the extent Total Annual Portfolio Operating Expenses exceed 1.30% and 1.60% 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.

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Lazard International Strategic Equity Portfolio

Lazard International Strategic Equity Portfolio

Investment Objective

The Portfolio seeks long-term 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard International Strategic Equity 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 International Strategic Equity Portfolio	Institutional Shares	Open Shares
Management Fees	0.75%	0.75%
Distribution and Service (12b-1) Fees	none	0.25%
Other Expenses	0.11%	0.13%
Total Annual Portfolio Operating Expenses	0.86%	1.13%

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 International Strategic Equity Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	88	274	477	1,061
Open Shares	115	359	622	1,375

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 52% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of non-US companies whose principal activities are located in countries represented by the MSCI EAFE Index that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Portfolio may invest up to 15% of its assets in securities of companies whose principal business activities are located in emerging market countries, although the allocation of the Portfolio’s assets to emerging market countries may vary from time to time.

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities.

The countries represented by the MSCI EAFE Index currently include: Australia, Austria, Belgium, Denmark, Finland, France, Germany, Greece, Hong Kong, Ireland, Israel, Italy, Japan, the Netherlands, New Zealand, Norway, Portugal, Singapore, Spain, Sweden, Switzerland and the United Kingdom.

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.

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 currency fluctuations, 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.

Non-Diversification Risk. Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios. The Portfolio’s 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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

Larger Cap Companies Risk. The securities of large market cap companies may underperform other segments of the market because such companies may be less responsive to competitive challenges and opportunities and may be unable to attain high growth rates during periods of economic expansion.

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

Best Quarter:
6/30/09 23.21%

Worst Quarter:
9/30/11 -19.36%

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.

Average Annual Returns Lazard International Strategic Equity Portfolio	1 Year	5 Years	Life of Portfolio	Inception Date
Institutional Shares	25.00%	(0.19%)	6.04%	Oct. 31, 2005
Open Shares	24.74%	(0.49%)	3.79%	Feb. 03, 2006
After Taxes on Distributions Institutional Shares	24.91%	(0.32%)	5.52%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	16.58%	(0.09%)	5.25%
MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Institutional)	17.32%	(3.69%)	3.14%
MSCI EAFE Index (reflects no deduction for fees, expenses or taxes) (Open)	17.32%	(3.69%)	1.34%

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Lazard U.S. Realty Equity Portfolio

Lazard U.S. Realty Equity Portfolio

Investment Objectives

The Portfolio’s primary investment objective is long-term capital appreciation,

with current income, including interest and dividends from portfolio securities, as a secondary objective.

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 U.S. Realty Equity 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 U.S. Realty Equity Portfolio		Institutional Shares	Open Shares
Management Fees		0.80%	0.80%
Distribution and Service (12b-1) Fees		none	0.25%
Other Expenses		1.54%	0.73%
Total Annual Portfolio Operating Expenses		2.34%	1.78%
Fee Waiver and Expense Reimbursement	[1]	1.14%	0.28%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	1.20%	1.50%

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

Expense Example Lazard U.S. Realty Equity Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	122	381	660	1,455
Open Shares	153	474	818	1,791

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 period, the Portfolio’s portfolio turnover rate was 52% of the average value of its portfolio.

Principal Investment Strategies

Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities (including common, convertible and preferred stocks) of US Realty Companies (defined below), as well as certain synthetic instruments related to US Realty Companies. Such synthetic instruments are investments that have economic characteristics similar to the Portfolio’s direct investments in US Realty Companies and may include warrants, rights, options and shares of ETFs.

The Investment Manager conducts proprietary quantitative, qualitative and on-site real estate analysis to select the Portfolio’s investments, which may include, as appropriate, research at the macroeconomic, sector, company and property level. The Investment Manager’s individual company research may consider a number of quantitative measures, including earnings growth potential, price to earnings or free cash flow multiples, price to NAV ratios, dividend yield and potential for growth, return on equity and return on assets, as well as qualitative factors such as overall business and growth strategy and quality of management.

“Realty Companies” are real estate-related companies of any size including, but not limited to, REITs, real estate operating or service companies and companies in the homebuilding, lodging and hotel industries, as well as companies engaged in the healthcare, gaming, retailing, restaurant, natural resources and utility industries, and other companies whose investments, balance sheets or income statements are real-estate intensive (i.e. the company’s actual or anticipated revenues, profits, assets, services or products are related to real estate including, but not limited to, the ownership, renting, leasing, construction, management, development or financing of commercial, industrial or residential real estate).

The Portfolio may invest in issuers of any market capitalization and securities of any maturity, and the Portfolio’s investments also may include securities purchased in IPOs.

The Portfolio is classified as “non-diversified” under 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.

The Portfolio also may invest up to 20% of its assets in equity and fixed income securities and instruments of companies or entities (which need not be US Realty Companies), including, but not limited to, securities of non-US companies and other investment companies.

The Portfolio’s investments in preferred stock and convertible and fixed income securities may include securities which, at the time of purchase, are rated below “investment grade” by an NRSRO, or the unrated equivalent as determined by the Investment Manager (“junk bonds”).

The Portfolio may, but is not required to, write put and covered call options on securities and indexes, for hedging purposes or to seek to increase returns.

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.

Securities Risks. While stocks have historically been a leading choice of long-term investors, they do fluctuate in price, often based on factors unrelated to the issuer’s value, such as investor perception. Preferred stock is subject to credit and interest rate risk (described below) and the risk that the dividend on the stock may be changed or omitted by the issuer and, unlike common stock, participation in the growth of an issuer may be limited. The market value of a convertible security tends to perform like that of a regular debt security so that, if market interest rates rise, the value of the convertible security falls. Investments in warrants involve certain risks, including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the warrant can be prudently exercised, in which case the warrant may expire without being exercised and result in a loss of the Portfolio’s entire investment.

Realty Companies Risk. Since the Portfolio focuses its investments in Realty Companies, the Portfolio could lose money due to the performance of real estate-related securities even if securities markets generally are experiencing positive results. The performance of investments made by the Portfolio may be determined to a great extent by the current status of the real estate industry in general, or by other factors (such as interest rates and the availability of loan capital) that may affect the real estate industry, even if other industries would not be so affected. Consequently, the investment strategies of the Portfolio could lead to securities investment results that may be significantly different from investments in securities of other industries or sectors or in a more broad-based portfolio generally.

The risks related to investments in Realty Companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing. An investment in REITs may be adversely affected or lost if the REIT fails to comply with applicable laws and regulations. If the Portfolio invests in a REIT that subsequently fails to qualify as a REIT under the Code, it is highly likely that the REIT will be subject to a substantial additional income tax liability that could cause it to liquidate investments, borrow funds under adverse conditions or, possibly, fail.

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

Non-Diversification Risk. Because the Portfolio may invest in a smaller number of issuers than other, more diversified investment portfolios, the Portfolio’s 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.

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 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. If there is a decline, or 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. Junk bonds tend to be more volatile, less liquid and are considered speculative. During unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like. Some fixed-income securities may give the issuer the option to call, or redeem, the securities before their maturity, and, during a time of lower or declining interest rates, the Portfolio may have to reinvest the proceeds in lower yielding securities (and the Portfolio may not benefit from any increase in the value of its portfolio holdings as a result of declining interest rates).

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 currency fluctuations, 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.

Options Risk. Writing options on securities and indexes, including for hedging purposes, may reduce returns or increase volatility, perhaps substantially, and may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions. Writing options is subject to many of the risks of, and can be highly sensitive to changes in the value of, the related security or index. As such, a small commitment to written options could potentially have a relatively large impact on the Portfolio’s performance. Purchasing options will reduce returns by the amount of premiums paid for options that are not exercised. Over-the-counter options purchased on securities and indexes are subject to the risk of default by the counterparty and can be illiquid.

Investment Companies and ETF Risk. Any investments in other investment companies and ETFs are subject to the risks of the investments of the investment companies and ETFs, as well as to the general risks of investing in investment companies and ETFs. Portfolio shares will bear not only the Portfolio’s management fees and operating expenses, but also their proportional share of the management fees and operating expenses of any other investment companies and ETFs in which the Portfolio invests.

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

The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Realty Equity 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 Portfolio commenced operations after all of the assets of an investment company advised by Alesco, Grubb & Ellis AGA U.S. Realty Fund (the “Predecessor Realty Equity Fund”), were transferred to the Portfolio in exchange for Open Shares of the Portfolio in a tax-free reorganization on September 23, 2011. The bar chart shows how the performance of the Portfolio’s Open Shares (or the Predecessor Realty Equity Fund’s Class A shares, prior to September 23, 2011) has varied from year to year. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Best Quarter:
9/30/09 36.29%

Worst Quarter:
9/30/11 -17.99%

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

After-tax returns for the Open Shares will 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.

Average Annual Returns Lazard U.S. Realty Equity Portfolio	1 Year	Life of Portfolio	Inception Date
Open Shares	20.58%	30.08%	Dec. 31, 2008
Institutional Shares	20.83%	34.88%	Sep. 26, 2011
After Taxes on Distributions Open Shares	19.43%	25.69%
After Taxes on Distributions and Sale of Portfolio Shares Open Shares	13.50%	24.08%
FTSE NAREIT All Equity REITs Index (reflects no deduction for fees, expenses or taxes) (Open)	19.70%	20.70%
FTSE NAREIT All Equity REITs Index (reflects no deduction for fees, expenses or taxes) (Institutional)	19.70%	27.38%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2023, to the extent Total Annual Portfolio Operating Expenses exceed 1.20% and 1.50% 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.

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Lazard International Small Cap Equity Portfolio

Lazard International Small Cap Equity Portfolio

Investment Objective

The Portfolio seeks long-term 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.

Shareholder Transaction Fees (fees paid directly from your investment)

Shareholder Fees Lazard International Small Cap Equity 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 International Small Cap Equity Portfolio		Institutional Shares	Open Shares
Management Fees		0.75%	0.75%
Distribution and Service (12b-1) Fees		none	0.25%
Other Expenses		0.43%	0.48%
Total Annual Portfolio Operating Expenses		1.18%	1.48%
Fee Waiver and Expense Reimbursement	[1]	0.05%	0.05%
Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement	[1]	1.13%	1.43%

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 International Small Cap Equity Portfolio (USD $)	1 Year	3 Years	5 Years	10 Years
Institutional Shares	115	370	644	1,427
Open Shares	146	463	803	1,764

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 48% of the average value of its portfolio.

Principal Investment Strategies

The Portfolio invests primarily in equity securities, principally common stocks, of relatively small non-US companies that the Investment Manager believes are undervalued based on their earnings, cash flow or asset values. The Investment Manager considers “small non-US companies” to be those non-US companies with market capitalizations, at the time of initial purchase by the Portfolio, below $5 billion or in the range of the smallest 10% of companies included in the MSCI EAFE Index (based on market capitalization of the Index as a whole, which ranged from approximately $498.5 million to $232.6 billion as of April 9, 2013).

In choosing stocks for the Portfolio, the Investment Manager looks for smaller, well-managed non-US companies that the Investment Manager believes have the potential for growth. Under normal circumstances, the Portfolio invests at least 80% of its assets in equity securities of small cap companies.

The Portfolio may invest up to 25% of its assets in securities of companies whose principal business activities are located in emerging market countries, although the allocation of the Portfolio’s assets to emerging market countries may vary from time to time.

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.

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

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 currency fluctuations, 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.

Value Investing Risk. The Portfolio invests in stocks believed by the Investment Manager to be undervalued, but that may not realize their perceived value for extended periods of time or may never realize their perceived value. The stocks in which the Portfolio invests may respond differently to market and other developments than other types of stocks.

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 International Small Cap Equity 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 31.53%

Worst Quarter:
12/31/08 -27.07%

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.

Average Annual Returns Lazard International Small Cap Equity Portfolio	1 Year	5 Years	10 Years	Life of Portfolio	Inception Date
Institutional Shares	22.28%	(1.96%)	8.95%	6.59%	Dec. 01, 1993
Open Shares	21.96%	(2.23%)	8.65%	6.04%	Feb. 13, 1997
After Taxes on Distributions Institutional Shares	21.95%	(2.29%)	7.34%	5.39%
After Taxes on Distributions and Sale of Portfolio Shares Institutional Shares	15.35%	(1.60%)	8.03%	5.71%
MSCI EAFE Small Cap Index (reflects no deduction for fees, expenses or taxes) (Institutional)	20.00%	(0.87%)	11.93%	4.76%
MSCI EAFE Small Cap Index (reflects no deduction for fees, expenses or taxes) (Open)	20.00%	(0.87%)	11.93%	4.99%

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2014, to the extent Total Annual Portfolio Operating Expenses exceed 1.13% and 1.43% 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.

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Value

Risk/Return:

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Risk/Return [Heading]

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Lazard U.S. Realty Income Portfolio

Objective [Heading]

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Investment Objectives

Objective, Primary [Text Block]

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The Portfolio’s primary investment objective is current income,

Objective, Secondary [Text Block]

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with long-term capital appreciation as a secondary objective.

Expense [Heading]

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Fees and Expenses

Expense Narrative [Text Block]

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

Shareholder Fees Caption [Text]

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Shareholder Transaction Fees (fees paid directly from your investment)

Operating Expenses Caption [Text]

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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

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2016-04-30

Portfolio Turnover [Heading]

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Portfolio Turnover

Portfolio Turnover [Text Block]

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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 period, the Portfolio’s portfolio turnover rate was 42% of the average value of its portfolio.

Portfolio Turnover, Rate

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42.00%

Expense Example [Heading]

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Example

Expense Example Narrative [Text Block]

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

Strategy [Heading]

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Principal Investment Strategies

Strategy Narrative [Text Block]

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Under normal circumstances, the Portfolio invests at least 80% of its assets in dividend-paying common and preferred stocks, convertible securities and fixed income securities of US Realty Companies (defined below), as well as certain synthetic instruments related to US Realty Companies. Such synthetic instruments are investments that have economic characteristics similar to the Portfolio’s direct investments in US Realty Companies and may include warrants, rights, options and shares of ETFs.

The Investment Manager focuses on investments having the potential to deliver regular income and to offer the opportunity for long-term growth and capital appreciation. The Investment Manager conducts proprietary quantitative, qualitative and on-site real estate analysis to select the Portfolio’s investments, which may include, as appropriate, research at the macroeconomic, sector, company and property level. The Investment Manager’s individual company research may consider a number of quantitative measures, including earnings growth potential, price to earnings or free cash flow multiples, price to NAV ratios, dividend yield and potential for growth, return on equity and return on assets, as well as qualitative factors such as overall business and growth strategy and quality of management.

“Realty Companies” are real estate-related companies of any size including, but not limited to, real estate investment trusts (“REITs”), real estate operating or service companies and companies in the homebuilding, lodging and hotel industries, as well as companies engaged in the healthcare, gaming, retailing, restaurant, natural resources and utility industries, and other companies whose investments, balance sheets or income statements are real-estate intensive (i.e., the company’s actual or anticipated revenues, profits, assets, services or products are related to real estate including, but not limited to, the ownership, renting, leasing, construction, management, development or financing of commercial, industrial or residential real estate).

The Portfolio’s investments in preferred stock and convertible and fixed income securities may include securities which, at the time of purchase, are rated below “investment grade” by a nationally recognized statistical rating organization (“NRSRO”), or the unrated equivalent as determined by the Investment Manager (“junk bonds”).

The Portfolio may invest in issuers of any market capitalization and securities of any maturity, and the Portfolio’s investments also may include securities purchased in initial public offerings (“IPOs”).

The Portfolio also may invest up to 25% of its net assets in companies organized as master limited partnerships and their affiliates.

The Portfolio also may invest up to 20% of its assets in other securities and instruments of companies or entities (which need not be US Realty Companies), including, but not limited to, securities of non-US companies and other investment companies.

The Portfolio may, but is not required to, write put and covered call options on securities and indexes, for hedging purposes or to seek to increase returns.

Risk [Heading]

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Principal Investment Risks

Risk Narrative [Text Block]

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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.

Realty Companies Risk. Since the Portfolio focuses its investments in Realty Companies, the Portfolio could lose money due to the performance of real estate-related securities even if securities markets generally are experiencing positive results. The performance of investments made by the Portfolio may be determined to a great extent by the current status of the real estate industry in general, or by other factors (such as interest rates and the availability of loan capital) that may affect the real estate industry, even if other industries would not be so affected. Consequently, the investment strategies of the Portfolio could lead to securities investment results that may be significantly different from investments in securities of other industries or sectors or in a more broad-based portfolio generally.

The risks related to investments in Realty Companies include, but are not limited to: adverse changes in general economic and local market conditions; adverse developments in employment; changes in supply or demand for similar or competing properties; unfavorable changes in applicable taxes, governmental regulations and interest rates; operating or development expenses; and lack of available financing. An investment in REITs may be adversely affected or lost if the REIT fails to comply with applicable laws and regulations. If the Portfolio invests in a REIT that subsequently fails to qualify as a REIT under the Internal Revenue Code of 1986, as amended (the “Code”), it is highly likely that the REIT will be subject to a substantial additional income tax liability that could cause it to liquidate investments, borrow funds under adverse conditions or, possibly, fail.

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

Preferred Securities Risk. There are various risks associated with investing in preferred securities, including credit risk; interest rate risk; deferral and omission of distributions; subordination; call and reinvestment risk; limited liquidity; limited voting rights; and special issuer redemption rights. In addition, unlike common stock, participation in the growth of an issuer may be limited.

• Credit risk is the risk that a security held by the Portfolio will decline in price or the issuer of the security will fail to make dividend, interest or principal payments when due because the issuer experiences a decline in its financial status.

• Interest rate risk is the risk that securities will decline in value because of changes in market interest rates. When market interest rates rise, the market value of such securities generally will fall. Securities with longer periods before maturity or effective durations may be more sensitive to interest rate changes.

• Preferred securities may include provisions that permit the issuer, at its discretion, to defer or omit distributions for a stated period without any adverse consequences to the issuer.

• Preferred securities are generally subordinated to bonds and other debt instruments in an issuer’s capital structure in terms of having priority to corporate income, claims to corporate assets and liquidation payments, and therefore will be subject to greater credit risk than more senior debt instruments.

• During periods of declining interest rates, an issuer may be able to exercise an option to call, redeem, its issue at par earlier than the scheduled maturity, which is generally known as call risk. If this occurs during a time of lower or declining interest rates, the Portfolio may have to reinvest the proceeds in lower yielding securities (and the Portfolio may not benefit from any increase in the value of its portfolio holdings as a result of declining interest rates). This is known as reinvestment risk.

• Certain preferred securities may be substantially less liquid than many other securities, such as common stocks or US Government securities. Illiquid securities involve the risk that the securities will not be able to be sold at the time desired by the Portfolio or at prices approximating the value at which the Portfolio is carrying the securities on its books.

• Generally, traditional preferred securities offer no voting rights with respect to the issuer unless preferred dividends have been in arrears for a specified number of periods, at which time the preferred security holders may elect a number of directors to the issuer’s board. Generally, once all the arrearages have been paid, the preferred security holders no longer have voting rights. Hybrid-preferred security holders generally have no voting rights.

• In certain varying circumstances, an issuer of preferred securities may redeem the securities prior to a specified date. For instance, for certain types of preferred securities, a redemption may be triggered by a change in US federal income tax or securities laws. As with call provisions, a redemption by the issuer may negatively impact the return of the security held by the Portfolio.

Other Equity Securities Risks. The market value of a convertible security tends to perform like that of a regular debt security so that, if market interest rates rise, the value of the convertible security falls. Investments in warrants involve certain risks, including the possible lack of a liquid market for resale, price fluctuations and the failure of the price of the underlying security to reach a level at which the warrant can be prudently exercised, in which case the warrant may expire without being exercised and result in a loss of the Portfolio’s entire investment.

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. Fixed income securities are subject to interest rate risk, credit risk and call and reinvestment risk as described above for preferred securities. The Portfolio’s investments in lower-rated, higher-yielding securities are subject to greater credit risk than its higher-rated investments. If there is a decline in the credit quality of a fixed-income security (or any guarantor of payment on such security), or a perception of a decline, the security’s value could fall, potentially lowering the Portfolio’s share price. Junk bonds tend to be more volatile, less liquid and are considered speculative. During unusual market conditions, the Portfolio may not be able to sell certain securities at the time and price it would like.

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 currency fluctuations, 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.

Non-Diversification Risk. Although the Portfolio is classified as “diversified” under the 1940 Act, it may invest in a smaller number of issuers than other, more diversified investment portfolios. The Portfolio’s 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.

Options Risk. Writing options on securities and indexes, including for hedging purposes, may reduce returns or increase volatility, perhaps substantially, and may cause the Portfolio to experience losses greater than if the Portfolio had not engaged in such transactions. Writing options is subject to many of the risks of, and can be highly sensitive to changes in the value of, the related security or index. As such, a small commitment to written options could potentially have a relatively large impact on the Portfolio’s performance. Purchasing options will reduce returns by the amount of premiums paid for options that are not exercised. Over-the-counter options purchased on securities and indexes are subject to the risk of default by the counterparty and can be illiquid.

Investment Companies and ETF Risk. Any investments in other investment companies and ETFs are subject to the risks of the investments of the investment companies and ETFs, as well as to the general risks of investing in investment companies and ETFs. Portfolio shares will bear not only the Portfolio’s management fees and operating expenses, but also their proportional share of the management fees and operating expenses of any other investment companies and ETFs in which the Portfolio invests.

Risk Lose Money [Text]

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

Bar Chart and Performance Table [Heading]

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

Performance Narrative [Text Block]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Realty Income Portfolio by showing the Portfolio’s year-by-year performance and its average annual performance compared to that of broad measures of market performance. The Portfolio commenced operations after all of the assets of an investment company advised by Grubb & Ellis Alesco Global Advisors, LLC (“Alesco”), Grubb & Ellis AGA Realty Income Fund (the “Predecessor Realty Income Fund”), were transferred to the Portfolio in exchange for Open Shares of the Portfolio in a tax-free reorganization on September 23, 2011. The bar chart shows how the performance of the Portfolio’s Open Shares (or the Predecessor Realty Income Fund’s Class A shares, prior to September 23, 2011) has varied from year to year. Updated performance information is available at www.LazardNet.com or by calling (800) 823-6300. The Portfolio’s past performance (before and after taxes) is not necessarily an indication of how the Portfolio will perform in the future.

Performance Information Illustrates Variability of Returns [Text]

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The accompanying bar chart and table provide some indication of the risks of investing in Lazard US Realty Income Portfolio by showing the Portfolio's year-by-year performance and its average annual performance compared to that of broad measures of market performance.

Performance Additional Market Index [Text]

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The 50% FTSE NAREIT All Equity REITs Index/50% Wells Fargo Hybrid and Preferred Securities REIT Index shown in the table is an unmanaged index created by the Investment Manager, and is a 50/50 blend of the FTSE NAREIT All Equity REITs Index and the Wells Fargo Hybrid and Preferred Securities REIT Index.

Performance Availability Phone [Text]

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(800) 823-6300

Performance Availability Website Address [Text]

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www.LazardNet.com

Performance Past Does Not Indicate Future [Text]

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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]

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Best Quarter:
6/30/09 40.10%

Worst Quarter:
3/31/09 -13.67%

Highest Quarterly Return, Label

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Best Quarter:

Highest Quarterly Return, Date

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Jun. 30, 2009

Highest Quarterly Return

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40.10%

Lowest Quarterly Return, Label

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Worst Quarter:

Lowest Quarterly Return, Date

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Mar. 31, 2009

Lowest Quarterly Return

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(13.67%)

Performance Table Heading

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

Performance Table Market Index Changed

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In future periods the Portfolio will no longer compare its performance to that of the S&P 500 Index, because the other indicies shown are believed to provide more appropriate comparisons for the Portfolio's performance.

Index No Deduction for Fees, Expenses, Taxes [Text]

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(reflects no deduction for fees, expenses or taxes)

Performance Table Uses Highest Federal Rate

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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

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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.

Performance Table Narrative

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After-tax returns for the Open Shares will 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. The 50% FTSE NAREIT All Equity REITs® Index/50% Wells Fargo Hybrid and Preferred Securities REIT® Index shown in the table is an unmanaged index created by the Investment Manager, and is a 50/50 blend of the FTSE NAREIT All Equity REITs Index and the Wells Fargo Hybrid and Preferred Securities REIT Index. In future periods the Portfolio will no longer compare its performance to that of the S&P 500 Index, because the other indicies shown are believed to provide more appropriate comparisons for the Portfolio’s performance.

FTSE NAREIT All Equity REITs Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

19.70%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

5.77%

FTSE NAREIT All Equity REITs Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

19.70%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

27.38%

Wells Fargo Hybrid and Preferred Securities REIT Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.38%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

15.65%

Wells Fargo Hybrid and Preferred Securities REIT Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

11.38%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

12.39%

50% FTSE NAREIT All Equity REITs Index/50% Wells Fargo Hybrid and Preferred Securities REIT Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

15.61%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

11.73%

50% FTSE NAREIT All Equity REITs Index/50% Wells Fargo Hybrid and Preferred Securities REIT Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

15.61%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

19.98%

S&P 500 Index (reflects no deduction for fees, expenses or taxes) (Open)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

16.00%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

4.74%

S&P 500 Index (reflects no deduction for fees, expenses or taxes) (Institutional)

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

16.00%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

22.36%

Open Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

0.25%

Other Expenses

rr_OtherExpensesOverAssets

0.47%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.47%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.02%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.45%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

148

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

459

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

797

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,752

Annual Return 2009

rr_AnnualReturn2009

71.58%

Annual Return 2010

rr_AnnualReturn2010

33.15%

Annual Return 2011

rr_AnnualReturn2011

(0.16%)

Annual Return 2012

rr_AnnualReturn2012

23.00%

1 Year

rr_AverageAnnualReturnYear01

23.00%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

13.95%

Inception Date

rr_AverageAnnualReturnInceptionDate

Jul. 30, 2008

Open Shares | After Taxes on Distributions

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

20.14%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

9.42%

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

Risk/Return:

rr_RiskReturnAbstract

1 Year

rr_AverageAnnualReturnYear01

14.93%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

9.66%

Institutional Shares

Risk/Return:

rr_RiskReturnAbstract

Redemption Fee (as a percentage of Amount Redeemed)

rr_RedemptionFeeOverRedemption

(1.00%)

Management Fees

rr_ManagementFeesOverAssets

0.75%

Distribution and Service (12b-1) Fees

rr_DistributionAndService12b1FeesOverAssets

none

Other Expenses

rr_OtherExpensesOverAssets

0.41%

Total Annual Portfolio Operating Expenses

rr_ExpensesOverAssets

1.16%

Fee Waiver or Reimbursement

rr_FeeWaiverOrReimbursementOverAssets

(0.01%)

^[1]

Total Annual Portfolio Operating Expenses After Fee Waiver and Expense Reimbursement

rr_NetExpensesOverAssets

1.15%

^[1]

Expense Example, with Redemption, 1 Year

rr_ExpenseExampleYear01

117

Expense Example, with Redemption, 3 Years

rr_ExpenseExampleYear03

365

Expense Example, with Redemption, 5 Years

rr_ExpenseExampleYear05

635

Expense Example, with Redemption, 10 Years

rr_ExpenseExampleYear10

1,406

1 Year

rr_AverageAnnualReturnYear01

23.32%

Life of Portfolio

rr_AverageAnnualReturnSinceInception

26.99%

Inception Date

rr_AverageAnnualReturnInceptionDate

Sep. 26, 2011

[1] Reflects a contractual agreement by the Investment Manager to waive its fee and, if necessary, reimburse the Portfolio through April 30, 2016, to the extent Total Annual Portfolio Operating Expenses exceed 1.15% and 1.45% 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.