Label	Element	Value
Risk Return [Abstract]	rr_RiskReturnAbstract
ProspectusDate	rr_ProspectusDate	Feb. 28, 2012
MainStay Convertible Fund (Prospectus Summary) | MainStay Convertible Fund
Risk Return [Abstract]	rr_RiskReturnAbstract
Risk/Return, Heading	rr_RiskReturnHeading	MainStay Convertible Fund
Investment Objective, Heading	rr_ObjectiveHeading	Investment Objective
investment Objective, Primary	rr_ObjectivePrimaryTextBlock	The Fund seeks capital appreciation together with current income.
Expense, Heading	rr_ExpenseHeading	Fees and Expenses of the Fund
Expense, Narrative	rr_ExpenseNarrativeTextBlock	The table below describes the fees and expenses that you may pay if you buy and hold shares of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the MainStay Funds. This amount may vary depending on the MainStay Fund in which you invest. More information about these and other discounts is available from your financial professional and in the "Information on Sales Charges" section starting on page 94 of the Prospectus and in the "Alternative Sales Arrangements" section on page 104 of the Statement of Additional Information.
Shareholder Fees, Caption	rr_ShareholderFeesCaption	Shareholder Fees (fees paid directly from your investment)
Operating Expenses, Caption	rr_OperatingExpensesCaption	Annual Fund 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	rr_PortfolioTurnoverTextBlock	The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs and may result in higher taxes when Fund shares are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the Example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was 80% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	80.00%
Expense Breakpoint, Discounts	rr_ExpenseBreakpointDiscounts	You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $50,000 in the MainStay Funds.
Expense Breakpoint, Minimum Investment Required Amount	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	50,000
Expense Example, Heading	rr_ExpenseExampleHeading	Example
Expense Example, Narrative	rr_ExpenseExampleNarrativeTextBlock	The Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem all of your shares at the end of those periods (except as indicated with respect to Class B and Class C shares). The Example reflects Class B shares converting into Investor Class shares in years 9-10; fees could be lower if you are eligible to convert to Class A shares instead. The Example also assumes that your investment has a 5% return each year and that the Fund's operating expenses remain the same.
Expense Example, By Year, Caption	rr_ExpenseExampleByYearCaption	Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Investment Strategy, Heading	rr_StrategyHeading	Principal Investment Strategies
Investment Strategy, Narrative	rr_StrategyNarrativeTextBlock	The Fund, under normal circumstances, invests at least 80% of its assets (net assets plus any borrowings for investment purposes) in "convertible securities" such as bonds, debentures, corporate notes, and preferred stocks or other securities that are convertible into common stock or the cash value of a stock or a basket or index of equity securities. The balance of the Fund may be invested or held in non-convertible debt, equity securities that do not pay regular dividends, U.S. government securities, and cash or cash equivalents.    Investment Process: The Fund takes a flexible approach by investing in a broad range of securities of a variety of companies and industries. The Fund invests in investment grade and below investment grade debt securities. Below investment grade securities are generally securities that receive low ratings from independent rating agencies, such as rated lower than BBB- by Standard & Poor's ("S&P") and Baa3 by Moody's Investors Service, Inc. ("Moody's"), or if unrated, are determined to be of equivalent quality by MacKay Shields LLC, the Fund's Subadvisor. Some securities that are rated below investment grade by independent rating agencies are commonly referred to as "junk bonds." The Subadvisor may also invest without restriction in securities with lower ratings from independent rating agencies, such as within the rating category of BB or B by S&P or Ba or B by Moody's. If independent rating agencies assign different ratings to the same security, the Fund will use the lower rating for purposes of determining the security's credit quality. In selecting convertible securities for purchase or sale, the Subadvisor takes into account a variety of investment considerations, including the potential return of the common stock into which the convertible security is convertible, credit risk, projected interest return, and the premium for the convertible security relative to the underlying common stock. The Fund may also invest in "synthetic" convertible securities, which are derivative positions composed of two or more securities whose investment characteristics, taken together, resemble those of traditional convertible securities. Unlike traditional convertible securities whose conversion values are based on the common stock of the issuer of the convertible security, "synthetic" and "exchangeable" convertible securities are preferred stocks or debt obligations of an issuer which are structured with an embedded equity component whose conversion value is based on the value of the common stocks of one or more different issuers or a particular benchmark (which may include indices, baskets of domestic stocks, commodities, a foreign issuer or basket of foreign stocks, or a company whose stock is not yet publicly traded). The value of a synthetic convertible is the sum of the values of its preferred stock or debt obligation component and its convertible component. The Fund may invest in foreign securities, which are securities issued by companies organized outside the U.S. and traded primarily in markets outside the U.S. The Subadvisor may sell a security if it no longer believes the security will contribute to meeting the investment objective of the Fund. In considering whether to sell a security, the Subadvisor may evaluate, among other things, the condition of the economy, meaningful changes in the issuer's financial condition, changes in credit risk, and changes in projected interest return.
Risk, Heading	rr_RiskHeading	Principal Risks
Risk, Narrative	rr_RiskNarrativeTextBlock	Loss of Money Risk: Before considering an investment in the Fund, you should understand that you could lose money. Market Changes Risk: The value of the Fund's investments may change because of broad changes in the markets in which the Fund invests, which could cause the Fund to underperform other funds with similar objectives. From time to time, markets may experience periods of acute stress that may result in increased volatility. Such market conditions tend to add significantly to the risk of short-term volatility in the net asset value of the Fund's shares. Management Risk: The investment strategies, practices and risk analysis used by the Fund's Subadvisor may not produce the desired results. Convertible Securities Risk: Convertible securities may be subordinate to other securities. In part, the total return for a convertible security depends upon performance of the underlying stock into which it can be converted. Also, issuers of convertible securities are often not as strong financially as those issuing securities with higher credit ratings, are more likely to encounter financial difficulties and typically are more vulnerable to changes in the economy, such as a recession or a sustained period of rising interest rates, which could affect their ability to make interest and principal payments. If an issuer stops making interest and/or principal payments, the Fund could lose its entire investment. Synthetic Convertible Securities Risk: The values of a synthetic convertible and a true convertible security may respond differently to market fluctuations. In addition, in purchasing a synthetic convertible security, the Fund may have counterparty (including counterparty credit) risk with respect to the financial institution or investment bank that offers the instrument. Purchasing a synthetic convertible security may provide greater flexibility than purchasing a traditional convertible security. Debt Securities Risk: The risks of investing in debt securities include (without limitation): (i) credit risk, i.e., the issuer may not repay the loan created by the issuance of that debt security; (ii) maturity risk, i.e., a debt security with a longer maturity may fluctuate in value more than one with a shorter maturity; (iii) market risk, i.e., low demand for debt securities may negatively impact their price; (iv) interest rate risk, i.e., when interest rates go up, the value of a debt security goes down, and when interest rates go down, the value of a debt security goes up; (v) selection risk, i.e., the securities selected by the Subadvisor may underperform the market or other securities selected by other funds; and (vi) call risk, i.e., during a period of falling interest rates, the issuer may redeem a security by repaying it early, which may reduce the Fund's income, if the proceeds are reinvested at lower interest rates. Additional risks associated with an investment in the Fund include the following: (i) not all U.S. government securities are insured or guaranteed by the U.S. government-some are backed only by the issuing agency, which must rely on its own resources to repay the debt; and (ii) the Fund's yield will fluctuate with changes in short-term interest rates. High-Yield Securities Risk: Investments in high-yield securities (commonly referred to as "junk bonds") are sometimes considered speculative because they present a greater risk of loss than higher quality securities. Such securities may, under certain circumstances, be less liquid than higher rated securities. These securities pay investors a premium (a high interest rate or yield) because of the increased risk of loss. These securities can also be subject to greater price volatility. In times of unusual or adverse market, economic or political conditions, these securities may experience higher than normal default rates. Equity Securities Risk: Investments in common stocks and other equity securities are particularly subject to the risk of changing economic, stock market, industry and company conditions and the risks inherent in the portfolio managers' ability to anticipate such changes that can adversely affect the value of the Fund's holdings. Opportunity for greater gain often comes with greater risk of loss. Foreign Securities Risk: Investments in foreign securities may be riskier than investments in U.S. securities. Differences between U.S. and foreign regulatory regimes and securities markets, including less stringent investor protections and disclosure standards of some foreign markets, less liquid trading markets, as well as political and economic developments in foreign countries, may affect the value of the Fund's investments in foreign securities. Foreign securities may also subject the Fund's investments to changes in currency rates. These risks may be greater with respect to securities of companies that conduct their business activities in emerging markets or whose securities are traded principally in emerging markets.
Risk, Lose Money	rr_RiskLoseMoney	Before considering an investment in the Fund, you should understand that you could lose money.
Bar Chart and Performance Table, Heading	rr_BarChartAndPerformanceTableHeading	Past Performance
Performance, Narrative	rr_PerformanceNarrativeTextBlock	The following bar chart and tables indicate some of the risks of investing in the Fund. The bar chart shows you how the Fund's calendar year performance has varied over the last ten years. Sales loads are not reflected in the bar chart. If they were, returns would be less than those shown. The average annual total returns table shows how the Fund's average annual total returns (before and after taxes) for the one-, five- and ten-year periods compare to those of a broad-based securities market index. The Fund has selected the Bank of America Merrill Lynch All U.S. Convertible Indexas its primary benchmark. The Bank of America Merrill Lynch All U.S. Convertible Index is a market-capitalization weighted index of domestic corporate convertible securities. In order to be included in the Index, bonds and preferred stocks must be convertible only to common stock and have a market value or original par value of at least $50 million. Performance data for the classes varies based on differences in their fee and expense structures. Performance figures for Investor Class shares, first offered on February 28, 2008, include the historical performance of Class A shares through February 27, 2008. Performance figures for Class I shares, first offered on November 28, 2008, include historical performance of Class B shares through November 27, 2008. Performance for newer share classes is adjusted for differences in fees and expenses. Unadjusted, the performance shown for the newer classes might have been lower. Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future. Please visit mainstayinvestments.com for more recent performance information.
Performance, Information Illustrates Variability of Returns	rr_PerformanceInformationIllustratesVariabilityOfReturns	The following bar chart and tables indicate some of the risks of investing in the Fund.
Performance, Availability Website Address	rr_PerformanceAvailabilityWebSiteAddress	mainstayinvestments.com
Performance, Past Does Not Indicate Future	rr_PerformancePastDoesNotIndicateFuture	Past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.
Bar Chart, Heading	rr_BarChartHeading	Annual Returns, Class B Shares (by calendar year 2002-2011)
Bar Chart, Narrative	rr_BarChartNarrativeTextBlock	The bar chart shows you how the Fund's calendar year performance has varied over the last ten years. Sales loads are not reflected in the bar chart. If they were, returns would be less than those shown.
Bar Chart, Does Not Reflect Sales Loads	rr_BarChartDoesNotReflectSalesLoads	Sales loads are not reflected in the bar chart. If they were, returns would be less than those shown.
Bar Chart, Closing	rr_BarChartClosingTextBlock	Best Quarter     3Q/09    14.57 % Worst Quarter    4Q/08   -17.45 %
Index No Deduction for Fees, Expenses, Taxes	rr_IndexNoDeductionForFeesExpensesTaxes	reflects no deductions for fees, expenses, or taxes
Performance Table, Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.
Performance Table, Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	Actual after-tax returns depend on your tax situation and may differ from those shown. After-tax returns are not relevant if you hold your shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.
Performance Table, One Class of after Tax Shown	rr_PerformanceTableOneClassOfAfterTaxShown	After-tax returns shown are for Class B shares. After-tax returns for the other share classes may vary.
Performance Table, Explanation after Tax Higher	rr_PerformanceTableExplanationAfterTaxHigher	In some cases, the return after taxes may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of shares at the end of the measurement period.
Performance Table, Closing	rr_PerformanceTableClosingTextBlock	After-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes. In some cases, the return after taxes may exceed the return before taxes due to an assumed tax benefit from any losses on a sale of shares at the end of the measurement period. Actual after-tax returns depend on your tax situation and may differ from those shown. After-tax returns are not relevant if you hold your shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts. After-tax returns shown are for Class B shares. After-tax returns for the other share classes may vary.
Average Annual Returns, Caption	rr_AverageAnnualReturnCaption	Average Annual Total Returns (for the periods ended December 31, 2011)
MainStay Convertible Fund (Prospectus Summary) | MainStay Convertible Fund | Bank of America Merrill Lynch All U.S. Convertible Index
Risk Return [Abstract]	rr_RiskReturnAbstract
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Bank of America Merrill Lynch All U.S. Convertible Index (reflects no deductions for fees, expenses, or taxes)
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	(5.18%)
Average Annual Returns, 5 Years	rr_AverageAnnualReturnYear05	2.10%
Average Annual Returns, 10 Years	rr_AverageAnnualReturnYear10	4.88%
MainStay Convertible Fund (Prospectus Summary) | MainStay Convertible Fund | Investor Class
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.50%
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of the original offering price or redemption proceeds)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none	[1]
Management Fees (as an annual percentage of the Fund's average daily net assets)	rr_ManagementFeesOverAssets	0.59%	[2]
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other Expenses	rr_OtherExpensesOverAssets	0.35%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.19%
Expense Example, With Redemption, 1 Year	rr_ExpenseExampleYear01	665
Expense Example, With Redemption, 3 Years	rr_ExpenseExampleYear03	907
Expense Example, With Redemption, 5 Years	rr_ExpenseExampleYear05	1,168
Expense Example, With Redemption, 10 Years	rr_ExpenseExampleYear10	1,914
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Investor Class Return Before Taxes
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	(10.65%)
Average Annual Returns, 5 Years	rr_AverageAnnualReturnYear05	2.61%
Average Annual Returns, 10 Years	rr_AverageAnnualReturnYear10	4.64%
MainStay Convertible Fund (Prospectus Summary) | MainStay Convertible Fund | Class A
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.50%
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of the original offering price or redemption proceeds)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none	[1]
Management Fees (as an annual percentage of the Fund's average daily net assets)	rr_ManagementFeesOverAssets	0.59%	[2]
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other Expenses	rr_OtherExpensesOverAssets	0.15%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.99%
Expense Example, With Redemption, 1 Year	rr_ExpenseExampleYear01	645
Expense Example, With Redemption, 3 Years	rr_ExpenseExampleYear03	848
Expense Example, With Redemption, 5 Years	rr_ExpenseExampleYear05	1,067
Expense Example, With Redemption, 10 Years	rr_ExpenseExampleYear10	1,696
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Class A Return Before Taxes
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	(10.47%)
Average Annual Returns, 5 Years	rr_AverageAnnualReturnYear05	2.77%
Average Annual Returns, 10 Years	rr_AverageAnnualReturnYear10	4.72%
MainStay Convertible Fund (Prospectus Summary) | MainStay Convertible Fund | Class B
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of the original offering price or redemption proceeds)	rr_MaximumDeferredSalesChargeOverOfferingPrice	5.00%
Management Fees (as an annual percentage of the Fund's average daily net assets)	rr_ManagementFeesOverAssets	0.59%	[2]
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other Expenses	rr_OtherExpensesOverAssets	0.35%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.94%
Expense Example, With Redemption, 1 Year	rr_ExpenseExampleYear01	697
Expense Example, With Redemption, 3 Years	rr_ExpenseExampleYear03	909
Expense Example, With Redemption, 5 Years	rr_ExpenseExampleYear05	1,247
Expense Example, With Redemption, 10 Years	rr_ExpenseExampleYear10	2,070
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	197
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	609
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,047
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,070
Annual Return 2002	rr_AnnualReturn2002	(9.50%)
Annual Return 2003	rr_AnnualReturn2003	21.46%
Annual Return 2004	rr_AnnualReturn2004	4.86%
Annual Return 2005	rr_AnnualReturn2005	6.26%
Annual Return 2006	rr_AnnualReturn2006	8.97%
Annual Return 2007	rr_AnnualReturn2007	13.86%
Annual Return 2008	rr_AnnualReturn2008	(34.28%)
Annual Return 2009	rr_AnnualReturn2009	41.44%
Annual Return 2010	rr_AnnualReturn2010	16.72%
Annual Return 2011	rr_AnnualReturn2011	(6.10%)
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	Best Quarter
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	14.57%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Worst Quarter
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(17.45%)
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Class B Return Before Taxes
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	(10.50%)
Average Annual Returns, 5 Years	rr_AverageAnnualReturnYear05	2.67%
Average Annual Returns, 10 Years	rr_AverageAnnualReturnYear10	4.47%
MainStay Convertible Fund (Prospectus Summary) | MainStay Convertible Fund | Class B | After Taxes on Distributions
Risk Return [Abstract]	rr_RiskReturnAbstract
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Class B Return After Taxes on Distributions
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	(11.73%)
Average Annual Returns, 5 Years	rr_AverageAnnualReturnYear05	1.88%
Average Annual Returns, 10 Years	rr_AverageAnnualReturnYear10	3.96%
MainStay Convertible Fund (Prospectus Summary) | MainStay Convertible Fund | Class B | After Taxes on Distributions and Sales
Risk Return [Abstract]	rr_RiskReturnAbstract
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Class B Return After Taxes on Distributions and Sale of Fund Shares
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	(5.97%)
Average Annual Returns, 5 Years	rr_AverageAnnualReturnYear05	2.06%
Average Annual Returns, 10 Years	rr_AverageAnnualReturnYear10	3.72%
MainStay Convertible Fund (Prospectus Summary) | MainStay Convertible Fund | Class C
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of the original offering price or redemption proceeds)	rr_MaximumDeferredSalesChargeOverOfferingPrice	1.00%
Management Fees (as an annual percentage of the Fund's average daily net assets)	rr_ManagementFeesOverAssets	0.59%	[2]
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other Expenses	rr_OtherExpensesOverAssets	0.35%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	1.94%
Expense Example, With Redemption, 1 Year	rr_ExpenseExampleYear01	297
Expense Example, With Redemption, 3 Years	rr_ExpenseExampleYear03	609
Expense Example, With Redemption, 5 Years	rr_ExpenseExampleYear05	1,047
Expense Example, With Redemption, 10 Years	rr_ExpenseExampleYear10	2,264
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	197
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	609
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,047
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	2,264
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Class C Return Before Taxes
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	(6.99%)
Average Annual Returns, 5 Years	rr_AverageAnnualReturnYear05	3.03%
Average Annual Returns, 10 Years	rr_AverageAnnualReturnYear10	4.46%
MainStay Convertible Fund (Prospectus Summary) | MainStay Convertible Fund | Class I
Risk Return [Abstract]	rr_RiskReturnAbstract
Maximum Sales Charge (Load) Imposed on Purchases (as a percentage of offering price)	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum Deferred Sales Charge (Load) (as a percentage of the lesser of the original offering price or redemption proceeds)	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Management Fees (as an annual percentage of the Fund's average daily net assets)	rr_ManagementFeesOverAssets	0.59%	[2]
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_OtherExpensesOverAssets	0.15%
Total Annual Fund Operating Expenses	rr_ExpensesOverAssets	0.74%
Expense Example, With Redemption, 1 Year	rr_ExpenseExampleYear01	76
Expense Example, With Redemption, 3 Years	rr_ExpenseExampleYear03	237
Expense Example, With Redemption, 5 Years	rr_ExpenseExampleYear05	411
Expense Example, With Redemption, 10 Years	rr_ExpenseExampleYear10	918
Average Annual Returns, Label	rr_AverageAnnualReturnLabel	Class I Return Before Taxes
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	(5.00%)
Average Annual Returns, 5 Years	rr_AverageAnnualReturnYear05	4.17%
Average Annual Returns, 10 Years	rr_AverageAnnualReturnYear10	5.58%

[1] A contingent deferred sales charge of 1.00% may be imposed on certain redemptions made within one year of the date of purchase on shares that were purchased without an initial sales charge.

[2] The management fee is as follows: 0.60% on assets up to $500 million; 0.55% on assets from $500 million up to $1 billion; and 0.50% on assets in excess of $1 billion, plus a fee for fund accounting services previously provided by New York Life Investment Management LLC ("New York Life Investments") under a separate fund accounting agreement. This addition to the management fee amounted to 0.01% of the Fund's average daily net assets, but did not result in a net increase in Total Annual Fund Operating Expenses.