0001206774-13-001121.txt : 20130321 0001206774-13-001121.hdr.sgml : 20130321 20130321125851 ACCESSION NUMBER: 0001206774-13-001121 CONFORMED SUBMISSION TYPE: 485BPOS PUBLIC DOCUMENT COUNT: 6 FILED AS OF DATE: 20130321 DATE AS OF CHANGE: 20130321 EFFECTIVENESS DATE: 20130321 FILER: COMPANY DATA: COMPANY CONFORMED NAME: DELAWARE GROUP EQUITY FUNDS I CENTRAL INDEX KEY: 0000027801 IRS NUMBER: 261651457 FISCAL YEAR END: 1031 FILING VALUES: FORM TYPE: 485BPOS SEC ACT: 1933 Act SEC FILE NUMBER: 002-10765 FILM NUMBER: 13707093 BUSINESS ADDRESS: STREET 1: ONE COMMERCE SQUARE STREET 2: 2005 MARKET STREET CITY: PHILADELPHIA STATE: PA ZIP: 19103 BUSINESS PHONE: 18005231918 MAIL ADDRESS: STREET 1: ONE COMMERCE SQUARE STREET 2: 2005 MARKET STREET CITY: PHILADELPHIA STATE: PA ZIP: 19103 FORMER COMPANY: FORMER CONFORMED NAME: DELAWARE GROUP EQUITY FUNDS I INC DATE OF NAME CHANGE: 19970604 FORMER COMPANY: FORMER CONFORMED NAME: DELAWARE GROUP DELAWARE FUND INC DATE OF NAME CHANGE: 19920703 FORMER COMPANY: FORMER CONFORMED NAME: DELAWARE FUND INC DATE OF NAME CHANGE: 19880718 FILER: COMPANY DATA: COMPANY CONFORMED NAME: DELAWARE GROUP EQUITY FUNDS I CENTRAL INDEX KEY: 0000027801 IRS NUMBER: 261651457 FISCAL YEAR END: 1031 FILING VALUES: FORM TYPE: 485BPOS SEC ACT: 1940 Act SEC FILE NUMBER: 811-00249 FILM NUMBER: 13707094 BUSINESS ADDRESS: STREET 1: ONE COMMERCE SQUARE STREET 2: 2005 MARKET STREET CITY: PHILADELPHIA STATE: PA ZIP: 19103 BUSINESS PHONE: 18005231918 MAIL ADDRESS: STREET 1: ONE COMMERCE SQUARE STREET 2: 2005 MARKET STREET CITY: PHILADELPHIA STATE: PA ZIP: 19103 FORMER COMPANY: FORMER CONFORMED NAME: DELAWARE GROUP EQUITY FUNDS I INC DATE OF NAME CHANGE: 19970604 FORMER COMPANY: FORMER CONFORMED NAME: DELAWARE GROUP DELAWARE FUND INC DATE OF NAME CHANGE: 19920703 FORMER COMPANY: FORMER CONFORMED NAME: DELAWARE FUND INC DATE OF NAME CHANGE: 19880718

0000027801 S000020812 Delaware Mid Cap Value Fund

C000058132 Class A DLMAX

C000058133 Class C DLMCX

C000058134 Class R DLMRX

C000058135 Institutional Class DLMIX

485BPOS 1 degrpequityfundi_485bpos.htm POST-EFFECTIVE AMENDMENT FILED PURSUANT TO SECURITIES ACT RULE 485(B)

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM N-1A

File No. 002-10765
File No. 811-00249

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933		/X/

	Pre-Effective Amendment No. _____	/ /

	Post-Effective Amendment No. 132	/X/

		and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940		/X/

	Amendment No. 132

(Check appropriate box or boxes.)



DELAWARE GROUP EQUITY FUNDS I
(Exact Name of Registrant as Specified in Charter)

	2005 Market Street, Philadelphia, Pennsylvania	19103-7094
	(Address of Principal Executive Offices)	(Zip Code)

Registrant’s Telephone Number, including Area Code:			(800) 523-1918

David F. Connor, Esq., 2005 Market Street, Philadelphia, PA 19103-7094
(Name and Address of Agent for Service)

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 Registration Statement under Rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of Philadelphia and Commonwealth of Pennsylvania on this 21st day of March, 2013.

DELAWARE GROUP EQUITY FUNDS I

By:	/s/ Patrick P. Coyne
	Patrick P. Coyne
	Chairman/President/Chief Executive Officer

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

Signature		Title	Date
/s/ Patrick P. Coyne		Chairman/President/Chief Executive Officer	March 21, 2013
Patrick P. Coyne		(Principal Executive Officer) and Trustee

Thomas L. Bennett	*	Trustee	March 21, 2013
Thomas L. Bennett

Joseph W. Chow	*	Trustee	March 21, 2013
Joseph W. Chow

John A. Fry	*	Trustee	March 21, 2013
John A. Fry

Anthony D. Knerr	*	Trustee	March 21, 2013
Anthony D. Knerr

Lucinda S. Landreth	*	Trustee	March 21, 2013
Lucinda S. Landreth

Frances A. Sevilla-Sacasa	*	Trustee	March 21, 2013
Frances A. Sevilla-Sacasa

Thomas K. Whitford	*	Trustee	March 21, 2013
Thomas K. Whitford

Janet L. Yeomans	*	Trustee	March 21, 2013
Janet L. Yeomans

J. Richard Zecher	*	Trustee	March 21, 2013
J. Richard Zecher

Richard Salus	*	Senior Vice President/Chief Financial Officer	March 21, 2013
Richard Salus		(Principal Financial Officer)

*By:	/s/ Patrick P. Coyne
	Patrick P. Coyne

as Attorney-in-Fact for each of the persons indicated
(Pursuant to Powers of Attorney previously filed)

INDEX TO EXHIBITS
(Delaware Group^® Equity Funds I N-1A)

Exhibit No.			Exhibit
EX-1-101.INS			XBRL Instance Document

EX-1-101.SCH			XBRL Taxonomy Extension Schema Document

EX-1-101.DEF			XBRL Taxonomy Extension Definition Linkbase

EX-1-101.LAB			XBRL Taxonomy Extension Labels Linkbase

EX-1-101.PRE			XBRL Taxonomy Extension Presentation Linkbase

EX-101.INS 2 dimidcapval-20130228.xml XBRL INSTANCE DOCUMENT 0000027801 2013-02-28 2013-02-28 0000027801 delaware:S000020812Member delaware:AAAAMember 2013-02-28 2013-02-28 0000027801 delaware:S000020812Member delaware:C000058132Member delaware:AAAAMember 2013-02-28 2013-02-28 0000027801 delaware:S000020812Member delaware:C000058133Member delaware:AAAAMember 2013-02-28 2013-02-28 0000027801 delaware:S000020812Member delaware:C000058134Member delaware:AAAAMember 2013-02-28 2013-02-28 0000027801 delaware:S000020812Member delaware:C000058135Member delaware:AAAAMember 2013-02-28 2013-02-28 0000027801 delaware:S000020812Member delaware:C000058132Member rr:AfterTaxesOnDistributionsMember delaware:AAAAMember 2013-02-28 2013-02-28 0000027801 delaware:S000020812Member delaware:C000058132Member rr:AfterTaxesOnDistributionsAndSalesMember delaware:AAAAMember 2013-02-28 2013-02-28 0000027801 delaware:S000020812Member delaware:benchmark0123AAAAMember delaware:AAAAMember 2013-02-28 2013-02-28 xbrli:pure iso4217:USD xbrli:shares iso4217:USD xbrli:shares 485BPOS 2012-10-31 DELAWARE GROUP EQUITY FUNDS I 0000027801 false 2013-02-28 <div style="display: none">~ http://xbrl.sec.gov/rr/role/RiskReturnDetailData column period compact * row dei_DocumentInformationDocumentAxis compact * row dei_LegalEntityAxis compact * row rr_ProspectusShareClassAxis compact * row rr_PerformanceMeasureAxis compact * row primary compact * ~</div> What is the Fund's investment objective? Delaware Mid Cap Value Fund seeks capital appreciation. What are the Fund's fees and expenses? The following table 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 Delaware Investments® Funds. More information about these and other discounts is available from your financial advisor, in the Fund's prospectus under the section entitled "About your account," and in the Fund's statement of additional information under the section entitled "Purchasing shares." Shareholder fees (fees paid directly from your investment) Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment) Example This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then 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 reflects the applicable waivers and reimbursements for the 1-year contractual period and the total operating expenses without waivers for years 2 through 10. Although your actual costs may be higher or lower, based on these assumptions your costs would be: Portfolio turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate 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 the 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 12% of the average value of its portfolio. What are the Fund's principal investment strategies? The Fund invests primarily in investments of medium-sized companies whose stock prices appear low relative to their underlying value or future potential. Among other factors, we consider the financial strength of a company, its management, the prospects for its industry, and any anticipated changes within the company that might suggest a more favorable outlook going forward. We focus on free cash flow in our individual stock selection, seeking companies that we believe have a sustainable ability to buy back shares, lower debt, and/or increase or initiate dividends. Under normal circumstances, at least 80% of the Fund's net assets will be in investments of medium-sized companies (the 80% policy). The Fund considers medium-sized companies to be those companies whose market capitalizations fall within the range represented in the Russell Midcap® Value Index (the Index)at the time of the Fund's investment. The Index's last reconstitution took place on June 22, 2012. As of June 29, 2012, the smallest company included in the Index had a market capitalization of $699 million and the largest company included in the Index had a market capitalization of $19.0 billion. The Fund's 80% policy can be changed without shareholder approval. However, shareholders will be given notice at least 60 days prior to any change. What are the principal risks of investing in the Fund? Investing in any mutual fund involves the risk that you may lose part or all of the money you invest. Over time, the value of your investment in the Fund will increase and decrease according to changes in the value of the securities in the Fund's portfolio. Principal risks include: Investments not guaranteed by the Manager or its affiliates — Investments in the Fund are not and will not be deposits with or liabilities of Macquarie Bank Limited ABN 46 008 583 542 and its holding companies, including their subsidiaries or related companies (Macquarie Group), and are subject to investment risk, including possible delays in repayment and loss of income and capital invested. No Macquarie Group company guarantees or will guarantee the performance of the Fund, the repayment of capital from the Fund, or any particular rate of return. Market risk — The risk that all or a majority of the securities in a certain market — such as the stock or bond market — will decline in value because of factors such as adverse political or economic conditions, future expectations, investor confidence, or heavy institutional selling. Small company risk — The risk that prices of small- and medium-sized companies may be more volatile than those of larger companies because of limited financial resources or dependence on narrow product lines. Interest rate risk — The risk that securities will decrease in value if interest rates rise. The risk is generally associated with bonds; however, because small- and medium-sized companies and companies in the real estate sector often borrow money to finance their operations, they may be adversely affected by rising interest rates. Liquidity risk — The possibility that securities cannot be readily sold within seven days at approximately the price at which a fund has valued them. Derivatives risk — Derivative contracts, such as options and futures, may involve additional expenses (such as the payment of premiums) and are subject to significant loss if a security or a securities index to which a derivative contract is associated moves in the opposite direction from what the portfolio manager anticipated. Counterparty risk — The risk that a counterparty to a derivative contract (such as a futures or options contract) or a repurchase agreement may fail to perform its obligations under the contract or agreement due to financial difficulties (such as a bankruptcy or reorganization). Government and regulatory risk — The risk that governments or regulatory authorities have, from time to time, taken or considered actions that could adversely affect various sectors of the securities markets. How has Delaware Mid Cap Value Fund performed? The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for the 1-year and lifetime periods compare with those of a broad measure of market performance. The Fund's past performance (before and after taxes) is not necessarily an indication of how it will perform in the future. The returns reflect expense caps in effect during certain of these periods. The returns would be lower without the expense caps. You may obtain the Fund's most recently available month-end performance by calling 800 523-1918 or by visiting our website at delawareinvestments.com/performance. Year-by-year total return (Class A)* During the periods illustrated in this bar chart, Class A's highest quarterly return was 18.38% for the quarter ended September 30, 2009 and its lowest quarterly return was -22.26% for the quarter ended September 30, 2011. The maximum Class A sales charge of 5.75%, which is normally deducted when you purchase shares, is not reflected in the highest/lowest quarterly returns or in the bar chart. If this sales charge were included, the returns would be less than those shown. The average annual returns in the table below do include the sales charge. Average annual total returns for periods ended December 31, 2012* After-tax performance is presented only for Class A shares of the Fund. The after-tax returns for other Fund classes may vary. Actual after-tax returns depend on the investor's individual tax situation and may differ from the returns shown. After-tax returns are not relevant for shares held in tax-deferred investment vehicles such as employer-sponsored 401(k) plans and individual retirement accounts (IRAs). The after-tax returns shown are calculated using the highest individual federal marginal income tax rates in effect during the periods presented and do not reflect the impact of state and local taxes. <div style="display:none">~http://delaware/role/ShareholderFeesDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact delaware_S000020812Member ~</div> 0.0575 0 0 0.01 0 0 0 0 <div style="display:none">~ http://delaware/role/OperatingExpensesDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact delaware_S000020812Member ~</div> 0.0075 0.003 0.0102 0.0207 -0.0082 0.0125 0.0075 0.01 0.0102 0.0277 -0.0077 0.02 0.0075 0.006 0.0102 0.0237 -0.0087 0.015 0.0075 0 0.0102 0.0177 -0.0077 0.01 <div style="display:none">~ http://delaware/role/ExpenseExampleAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact delaware_S000020812Member ~</div> 695 1112 1553 2776 303 786 1396 3043 153 656 1187 2640 102 482 887 2020 <div style="display:none">~ http://delaware/role/ExpenseExampleNoRedemptionAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact delaware_S000020812Member ~</div> 203 786 1396 3043 <div style="display:none">~ http://delaware/role/BarChartDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact delaware_S000020812Member ~</div> 0.2984 0.2763 -0.0577 0.1314 <div style="display:none">~ http://delaware/role/PerformanceTableDataAAAA column period compact * column rr_ProspectusShareClassAxis compact * row primary compact * row dei_LegalEntityAxis compact delaware_S000020812Member ~</div> 0.0668 0.0615 0.0506 0.1123 0.1285 0.134 0.185 0.0224 0.0209 0.019 0.0381 0.0446 0.0371 0.0485 2013-02-28 (lifetime: 2/1/08 - 12/31/12) (lifetime: 7/31/08 - 12/31/12) (lifetime: 7/31/08 - 12/31/12) (lifetime: 2/1/08-12/31/12) *Because the Fund has combined its retail and institutional prospectuses, the bar chart and the after tax returns in the average annual total returns table show the performance of the Fund's Class A shares. 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 Delaware Investments® Funds. More information about these and other discounts is available from your financial advisor, in the Fund's prospectus under the section entitled "About your account," and in the Fund's statement of additional information under the section entitled "Purchasing shares." 50000 0.12 Investing in any mutual fund involves the risk that you may lose part or all of the money you invest. Over time, the value of your investment in the Fund will increase and decrease according to changes in the value of the securities in the Fund's portfolio. The Fund's past performance (before and after taxes) is not necessarily an indication of how it will perform in the future. highest quarterly return was 18.38% for the quarter ended September 30, 2009 0.1838 lowest quarterly return was -22.26% for the quarter ended September 30, 2011 -0.2226 2009-09-30 2011-09-30 delawareinvestments.com/performance 800 523-1918 The after-tax returns shown are calculated using the highest individual federal marginal income tax rates in effect during the periods presented and do not reflect the impact of state and local taxes. After-tax returns are not relevant for shares held in tax-deferred investment vehicles such as employer-sponsored 401(k) plans and individual retirement accounts (IRAs). After-tax performance is presented only for Class A shares of the Fund. 2014-02-28 2013-02-28 The Fund's investment manager, Delaware Management Company (Manager), is contractually waiving its investment advisory fees and/or reimbursing expenses (excluding any 12b-1 fees, taxes, interest, short sale and dividend interest expenses, brokerage fees, certain insurance costs, and nonroutine expenses or costs, including, but not limited to, those relating to reorganizations, litigation, conducting shareholder meetings, and liquidations) in order to prevent total annual fund operating expenses from exceeding 1.00% of the Fund's average daily net assets from February 28, 2013 through February 28, 2014. In addition, the Fund's distributor, Delaware Distributors, L.P. (Distributor), has contracted to limit the Class A and Class R shares' 12b-1 fees to no more than 0.25% and 0.50%, respectively, of the classes' average daily net assets from February 28, 2013 through February 28, 2014. These waivers and reimbursements may only be terminated by agreement of the Manager or the Distributor, as applicable, and the Fund. Class C shares redeemed within one year of purchase are subject to a 1.00% contingent deferred sales charge (CDSC). 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Expense Example, No Redemption (dei_DocumentInformationDocumentAxis, (Delaware Mid Cap Value Fund), Class C, USD $)	0 Months Ended
	Feb. 28, 2013
(Delaware Mid Cap Value Fund) \| Class C
Expense Example, No Redemption:
Expense Example, No Redemption, 1 Year	$ 203
Expense Example, No Redemption, 3 Years	786
Expense Example, No Redemption, 5 Years	1,396
Expense Example, No Redemption, 10 Years	$ 3,043

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Expense Example (dei_DocumentInformationDocumentAxis, (Delaware Mid Cap Value Fund), USD $)	0 Months Ended
	Feb. 28, 2013
Class A
Expense Example:
Expense Example, with Redemption, 1 Year	$ 695
Expense Example, with Redemption, 3 Years	1,112
Expense Example, with Redemption, 5 Years	1,553
Expense Example, with Redemption, 10 Years	2,776
Class C
Expense Example:
Expense Example, with Redemption, 1 Year	303
Expense Example, with Redemption, 3 Years	786
Expense Example, with Redemption, 5 Years	1,396
Expense Example, with Redemption, 10 Years	3,043
Institutional Class
Expense Example:
Expense Example, with Redemption, 1 Year	102
Expense Example, with Redemption, 3 Years	482
Expense Example, with Redemption, 5 Years	887
Expense Example, with Redemption, 10 Years	2,020
Class R
Expense Example:
Expense Example, with Redemption, 1 Year	153
Expense Example, with Redemption, 3 Years	656
Expense Example, with Redemption, 5 Years	1,187
Expense Example, with Redemption, 10 Years	$ 2,640

XML 13 R3.htm IDEA: XBRL DOCUMENT

Shareholder Fees (dei_DocumentInformationDocumentAxis, (Delaware Mid Cap Value Fund))

0 Months Ended

Feb. 28, 2013

Class A

Shareholder Fees:

Maximum sales charge (load) imposed on purchases as a percentage of offering price

5.75%

Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower

none

Class C

Shareholder Fees:

Maximum sales charge (load) imposed on purchases as a percentage of offering price

none

Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower

1.00%

^[1]

Institutional Class

Shareholder Fees:

Maximum sales charge (load) imposed on purchases as a percentage of offering price

none

Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower

none

Class R

Shareholder Fees:

Maximum sales charge (load) imposed on purchases as a percentage of offering price

none

Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower

none

[1]	Class C shares redeemed within one year of purchase are subject to a 1.00% contingent deferred sales charge (CDSC).

- Definition

Maximum Deferred Sales Charge (Load) (as a percentage of ____) A.3.instructions.2.a.i "Maximum Deferred Sales Charge (Load)" includes the maximum total deferred sales charge (load) payable upon redemption, in installments, or both, expressed as a percentage of the amount or amounts stated in response to Item 7(a), except that, for a sales charge (load) based on net asset value at the time of purchase, show the sales charge (load) as a percentage of the offering price at the time of purchase. A Fund may include in a footnote to the table, if applicable, a tabular presentation showing the amount of deferred sales charges (loads) over time or a narrative explanation of the sales charges (loads) (e.g., __% in the first year after purchase, declining to __% in the __ year and eliminated thereafter). A.3.instructions.2.a.ii If more than one type of sales charge (load) is imposed (e.g., a deferred sales charge (load) and a front-end sales charge (load)), the first caption in the table should read "Maximum Sales Charge (Load)" and show the maximum cumulative percentage. Show the percentage amounts and the terms of each sales charge (load) comprising that figure on separate lines below.

+ References+ Details

- Definition

+ References+ Details

XML 14 R1.htm IDEA: XBRL DOCUMENT

(Delaware Mid Cap Value Fund)

What is the Fund's investment objective?

Delaware Mid Cap Value Fund seeks capital appreciation.

What are the Fund's fees and expenses?

The following table 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 Delaware Investments® Funds. More information about these and other discounts is available from your financial advisor, in the Fund's prospectus under the section entitled "About your account," and in the Fund's statement of additional information under the section entitled "Purchasing shares."

Shareholder fees (fees paid directly from your investment)

Shareholder Fees (Delaware Mid Cap Value Fund)	Class A	Class C		Class R	Institutional Class
Maximum sales charge (load) imposed on purchases as a percentage of offering price	5.75%	none		none	none
Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower	none	1.00%	^[1]	none	none

[1]	Class C shares redeemed within one year of purchase are subject to a 1.00% contingent deferred sales charge (CDSC).

Annual fund operating expenses (expenses that you pay each year as a percentage of the value of your investment)

Annual Fund Operating Expenses (Delaware Mid Cap Value Fund)		Class A	Class C	Class R	Institutional Class
Management fees		0.75%	0.75%	0.75%	0.75%
Distribution and service (12b-1) fees		0.30%	1.00%	0.60%	none
Other expenses		1.02%	1.02%	1.02%	1.02%
Total annual fund operating expenses		2.07%	2.77%	2.37%	1.77%
Fee waivers and expense reimbursements	^[1]	(0.82%)	(0.77%)	(0.87%)	(0.77%)
Total annual fund operating expenses after fee waivers and expense reimbursements		1.25%	2.00%	1.50%	1.00%

[1]

The Fund's investment manager, Delaware Management Company (Manager), is contractually waiving its investment advisory fees and/or reimbursing expenses (excluding any 12b-1 fees, taxes, interest, short sale and dividend interest expenses, brokerage fees, certain insurance costs, and nonroutine expenses or costs, including, but not limited to, those relating to reorganizations, litigation, conducting shareholder meetings, and liquidations) in order to prevent total annual fund operating expenses from exceeding 1.00% of the Fund's average daily net assets from February 28, 2013 through February 28, 2014. In addition, the Fund's distributor, Delaware Distributors, L.P. (Distributor), has contracted to limit the Class A and Class R shares' 12b-1 fees to no more than 0.25% and 0.50%, respectively, of the classes' average daily net assets from February 28, 2013 through February 28, 2014. These waivers and reimbursements may only be terminated by agreement of the Manager or the Distributor, as applicable, and the Fund.

Example

This example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then 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 reflects the applicable waivers and reimbursements for the 1-year contractual period and the total operating expenses without waivers for years 2 through 10. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Expense Example (Delaware Mid Cap Value Fund) (USD $)	1 Year	3 Years	5 Years	10 Years
Class A	695	1,112	1,553	2,776
Class C	303	786	1,396	3,043
Class R	153	656	1,187	2,640
Institutional Class	102	482	887	2,020

Expense Example, No Redemption (Delaware Mid Cap Value Fund) (USD $)	1 Year	3 Years	5 Years	10 Years
Class C	203	786	1,396	3,043

Portfolio turnover

The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate 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 the 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 12% of the average value of its portfolio.

What are the Fund's principal investment strategies?

The Fund invests primarily in investments of medium-sized companies whose stock prices appear low relative to their underlying value or future potential. Among other factors, we consider the financial strength of a company, its management, the prospects for its industry, and any anticipated changes within the company that might suggest a more favorable outlook going forward. We focus on free cash flow in our individual stock selection, seeking companies that we believe have a sustainable ability to buy back shares, lower debt, and/or increase or initiate dividends. Under normal circumstances, at least 80% of the Fund's net assets will be in investments of medium-sized companies (the 80% policy). The Fund considers medium-sized companies to be those companies whose market capitalizations fall within the range represented in the Russell Midcap® Value Index (the Index)at the time of the Fund's investment. The Index's last reconstitution took place on June 22, 2012. As of June 29, 2012, the smallest company included in the Index had a market capitalization of $699 million and the largest company included in the Index had a market capitalization of $19.0 billion. The Fund's 80% policy can be changed without shareholder approval. However, shareholders will be given notice at least 60 days prior to any change.

What are the principal risks of investing in the Fund?

Investing in any mutual fund involves the risk that you may lose part or all of the money you invest. Over time, the value of your investment in the Fund will increase and decrease according to changes in the value of the securities in the Fund's portfolio. Principal risks include:

Investments not guaranteed by the Manager or its affiliates — Investments in the Fund are not and will not be deposits with or liabilities of Macquarie Bank Limited ABN 46 008 583 542 and its holding companies, including their subsidiaries or related companies (Macquarie Group), and are subject to investment risk, including possible delays in repayment and loss of income and capital invested. No Macquarie Group company guarantees or will guarantee the performance of the Fund, the repayment of capital from the Fund, or any particular rate of return.

Market risk — The risk that all or a majority of the securities in a certain market — such as the stock or bond market — will decline in value because of factors such as adverse political or economic conditions, future expectations, investor confidence, or heavy institutional selling.

Small company risk — The risk that prices of small- and medium-sized companies may be more volatile than those of larger companies because of limited financial resources or dependence on narrow product lines.

Interest rate risk — The risk that securities will decrease in value if interest rates rise. The risk is generally associated with bonds; however, because small- and medium-sized companies and companies in the real estate sector often borrow money to finance their operations, they may be adversely affected by rising interest rates.

Liquidity risk — The possibility that securities cannot be readily sold within seven days at approximately the price at which a fund has valued them.

Derivatives risk — Derivative contracts, such as options and futures, may involve additional expenses (such as the payment of premiums) and are subject to significant loss if a security or a securities index to which a derivative contract is associated moves in the opposite direction from what the portfolio manager anticipated.

Counterparty risk — The risk that a counterparty to a derivative contract (such as a futures or options contract) or a repurchase agreement may fail to perform its obligations under the contract or agreement due to financial difficulties (such as a bankruptcy or reorganization).

Government and regulatory risk — The risk that governments or regulatory authorities have, from time to time, taken or considered actions that could adversely affect various sectors of the securities markets.

How has Delaware Mid Cap Value Fund performed?

The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for the 1-year and lifetime periods compare with those of a broad measure of market performance. The Fund's past performance (before and after taxes) is not necessarily an indication of how it will perform in the future. The returns reflect expense caps in effect during certain of these periods. The returns would be lower without the expense caps. You may obtain the Fund's most recently available month-end performance by calling 800 523-1918 or by visiting our website at delawareinvestments.com/performance.

Year-by-year total return (Class A)*

During the periods illustrated in this bar chart, Class A's highest quarterly return was 18.38% for the quarter ended September 30, 2009 and its lowest quarterly return was -22.26% for the quarter ended September 30, 2011. The maximum Class A sales charge of 5.75%, which is normally deducted when you purchase shares, is not reflected in the highest/lowest quarterly returns or in the bar chart. If this sales charge were included, the returns would be less than those shown. The average annual returns in the table below do include the sales charge.

Average annual total returns for periods ended December 31, 2012*

Average Annual Total Returns (Delaware Mid Cap Value Fund)	Label	1 Year	Lifetime
Class A	(lifetime: 2/1/08 - 12/31/12)	6.68%	2.24%
Class A return after taxes on distributions		6.15%	2.09%
Class A return after taxes on distributions and sale of Fund shares		5.06%	1.90%
Class C	(lifetime: 7/31/08 - 12/31/12)	11.23%	3.81%
Class R	(lifetime: 7/31/08 - 12/31/12)	12.85%	4.46%
Institutional Class	(lifetime: 2/1/08-12/31/12)	13.40%	3.71%
Russell Midcap® Value Index (reflects no deduction for fees, expenses, or taxes)		18.50%	4.85%

*Because the Fund has combined its retail and institutional prospectuses, the bar chart and the after tax returns in the average annual total returns table show the performance of the Fund's Class A shares.

After-tax performance is presented only for Class A shares of the Fund. The after-tax returns for other Fund classes may vary. Actual after-tax returns depend on the investor's individual tax situation and may differ from the returns shown. After-tax returns are not relevant for shares held in tax-deferred investment vehicles such as employer-sponsored 401(k) plans and individual retirement accounts (IRAs). The after-tax returns shown are calculated using the highest individual federal marginal income tax rates in effect during the periods presented and do not reflect the impact of state and local taxes.

XML 15 R11.htm IDEA: XBRL DOCUMENT

Annual Total Returns (dei_DocumentInformationDocumentAxis, (Delaware Mid Cap Value Fund), Class A)	0 Months Ended
	Feb. 28, 2013
(Delaware Mid Cap Value Fund) \| Class A
Bar Chart Table:
Annual Return 2009	29.84%
Annual Return 2010	27.63%
Annual Return 2011	(5.77%)
Annual Return 2012	13.14%

XML 16 R15.htm IDEA: XBRL DOCUMENT

Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Document Type	dei_DocumentType	485BPOS
Document Period End Date	dei_DocumentPeriodEndDate	Oct. 31, 2012
Registrant Name	dei_EntityRegistrantName	DELAWARE GROUP EQUITY FUNDS I
Central Index Key	dei_EntityCentralIndexKey	0000027801
Amendment Flag	dei_AmendmentFlag	false
Document Creation Date	dei_DocumentCreationDate	Feb. 28, 2013
Document Effective Date	dei_DocumentEffectiveDate	Feb. 28, 2013
Prospectus Date	rr_ProspectusDate	Feb. 28, 2013
(Delaware Mid Cap Value Fund)
Risk/Return:	rr_RiskReturnAbstract
Objective [Heading]	rr_ObjectiveHeading	What is the Fund's investment objective?
Objective, Primary [Text Block]	rr_ObjectivePrimaryTextBlock	Delaware Mid Cap Value Fund seeks capital appreciation.
Expense [Heading]	rr_ExpenseHeading	What are the Fund's fees and expenses?
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	The following table 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 Delaware Investments® Funds. More information about these and other discounts is available from your financial advisor, in the Fund's prospectus under the section entitled "About your account," and in the Fund's statement of additional information under the section entitled "Purchasing shares."
Shareholder Fees Caption [Text]	rr_ShareholderFeesCaption	Shareholder fees (fees paid directly from your investment)
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	Annual fund 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	2014-02-28
Portfolio Turnover [Heading]	rr_PortfolioTurnoverHeading	Portfolio turnover
Portfolio Turnover [Text Block]	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 rate 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 the 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 12% of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	12.00%
Expense Breakpoint Discounts [Text]	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 Delaware Investments® Funds. More information about these and other discounts is available from your financial advisor, in the Fund's prospectus under the section entitled "About your account," and in the Fund's statement of additional information under the section entitled "Purchasing shares."
Expense Breakpoint, Minimum Investment Required [Amount]	rr_ExpenseBreakpointMinimumInvestmentRequiredAmount	50,000
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 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. The example also assumes that your investment has a 5% return each year and reflects the applicable waivers and reimbursements for the 1-year contractual period and the total operating expenses without waivers for years 2 through 10. Although your actual costs may be higher or lower, based on these assumptions your costs would be:
Strategy [Heading]	rr_StrategyHeading	What are the Fund's principal investment strategies?
Strategy Narrative [Text Block]	rr_StrategyNarrativeTextBlock	The Fund invests primarily in investments of medium-sized companies whose stock prices appear low relative to their underlying value or future potential. Among other factors, we consider the financial strength of a company, its management, the prospects for its industry, and any anticipated changes within the company that might suggest a more favorable outlook going forward. We focus on free cash flow in our individual stock selection, seeking companies that we believe have a sustainable ability to buy back shares, lower debt, and/or increase or initiate dividends. Under normal circumstances, at least 80% of the Fund's net assets will be in investments of medium-sized companies (the 80% policy). The Fund considers medium-sized companies to be those companies whose market capitalizations fall within the range represented in the Russell Midcap® Value Index (the Index)at the time of the Fund's investment. The Index's last reconstitution took place on June 22, 2012. As of June 29, 2012, the smallest company included in the Index had a market capitalization of $699 million and the largest company included in the Index had a market capitalization of $19.0 billion. The Fund's 80% policy can be changed without shareholder approval. However, shareholders will be given notice at least 60 days prior to any change.
Risk [Heading]	rr_RiskHeading	What are the principal risks of investing in the Fund?
Risk Narrative [Text Block]	rr_RiskNarrativeTextBlock	Investing in any mutual fund involves the risk that you may lose part or all of the money you invest. Over time, the value of your investment in the Fund will increase and decrease according to changes in the value of the securities in the Fund's portfolio. Principal risks include: Investments not guaranteed by the Manager or its affiliates — Investments in the Fund are not and will not be deposits with or liabilities of Macquarie Bank Limited ABN 46 008 583 542 and its holding companies, including their subsidiaries or related companies (Macquarie Group), and are subject to investment risk, including possible delays in repayment and loss of income and capital invested. No Macquarie Group company guarantees or will guarantee the performance of the Fund, the repayment of capital from the Fund, or any particular rate of return. Market risk — The risk that all or a majority of the securities in a certain market — such as the stock or bond market — will decline in value because of factors such as adverse political or economic conditions, future expectations, investor confidence, or heavy institutional selling. Small company risk — The risk that prices of small- and medium-sized companies may be more volatile than those of larger companies because of limited financial resources or dependence on narrow product lines. Interest rate risk — The risk that securities will decrease in value if interest rates rise. The risk is generally associated with bonds; however, because small- and medium-sized companies and companies in the real estate sector often borrow money to finance their operations, they may be adversely affected by rising interest rates. Liquidity risk — The possibility that securities cannot be readily sold within seven days at approximately the price at which a fund has valued them. Derivatives risk — Derivative contracts, such as options and futures, may involve additional expenses (such as the payment of premiums) and are subject to significant loss if a security or a securities index to which a derivative contract is associated moves in the opposite direction from what the portfolio manager anticipated. Counterparty risk — The risk that a counterparty to a derivative contract (such as a futures or options contract) or a repurchase agreement may fail to perform its obligations under the contract or agreement due to financial difficulties (such as a bankruptcy or reorganization). Government and regulatory risk — The risk that governments or regulatory authorities have, from time to time, taken or considered actions that could adversely affect various sectors of the securities markets.
Risk Lose Money [Text]	rr_RiskLoseMoney	Investing in any mutual fund involves the risk that you may lose part or all of the money you invest. Over time, the value of your investment in the Fund will increase and decrease according to changes in the value of the securities in the Fund's portfolio.
Bar Chart and Performance Table [Heading]	rr_BarChartAndPerformanceTableHeading	How has Delaware Mid Cap Value Fund performed?
Performance Narrative [Text Block]	rr_PerformanceNarrativeTextBlock	The bar chart and table below provide some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for the 1-year and lifetime periods compare with those of a broad measure of market performance. The Fund's past performance (before and after taxes) is not necessarily an indication of how it will perform in the future. The returns reflect expense caps in effect during certain of these periods. The returns would be lower without the expense caps. You may obtain the Fund's most recently available month-end performance by calling 800 523-1918 or by visiting our website at delawareinvestments.com/performance.
Performance Availability Phone [Text]	rr_PerformanceAvailabilityPhone	800 523-1918
Performance Availability Website Address [Text]	rr_PerformanceAvailabilityWebSiteAddress	delawareinvestments.com/performance
Performance Past Does Not Indicate Future [Text]	rr_PerformancePastDoesNotIndicateFuture	The Fund's past performance (before and after taxes) is not necessarily an indication of how it will perform in the future.
Bar Chart [Heading]	rr_BarChartHeading	Year-by-year total return (Class A)*
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	During the periods illustrated in this bar chart, Class A's highest quarterly return was 18.38% for the quarter ended September 30, 2009 and its lowest quarterly return was -22.26% for the quarter ended September 30, 2011. The maximum Class A sales charge of 5.75%, which is normally deducted when you purchase shares, is not reflected in the highest/lowest quarterly returns or in the bar chart. If this sales charge were included, the returns would be less than those shown. The average annual returns in the table below do include the sales charge.
Performance Table Heading	rr_PerformanceTableHeading	Average annual total returns for periods ended December 31, 2012*
Performance Table Uses Highest Federal Rate	rr_PerformanceTableUsesHighestFederalRate	The after-tax returns shown are calculated using the highest individual federal marginal income tax rates in effect during the periods presented and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred	rr_PerformanceTableNotRelevantToTaxDeferred	After-tax returns are not relevant for shares held in tax-deferred investment vehicles such as employer-sponsored 401(k) plans and individual retirement accounts (IRAs).
Performance Table One Class of after Tax Shown [Text]	rr_PerformanceTableOneClassOfAfterTaxShown	After-tax performance is presented only for Class A shares of the Fund.
Performance Table Footnotes	rr_PerformanceTableFootnotesTextBlock	*Because the Fund has combined its retail and institutional prospectuses, the bar chart and the after tax returns in the average annual total returns table show the performance of the Fund's Class A shares.
Performance Table Closing [Text Block]	rr_PerformanceTableClosingTextBlock	After-tax performance is presented only for Class A shares of the Fund. The after-tax returns for other Fund classes may vary. Actual after-tax returns depend on the investor's individual tax situation and may differ from the returns shown. After-tax returns are not relevant for shares held in tax-deferred investment vehicles such as employer-sponsored 401(k) plans and individual retirement accounts (IRAs). The after-tax returns shown are calculated using the highest individual federal marginal income tax rates in effect during the periods presented and do not reflect the impact of state and local taxes.
(Delaware Mid Cap Value Fund) \| Russell Midcap® Value Index (reflects no deduction for fees, expenses, or taxes)
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	18.50%
Lifetime	rr_AverageAnnualReturnSinceInception	4.85%
(Delaware Mid Cap Value Fund) \| Class A
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases as a percentage of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	5.75%
Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Management fees	rr_ManagementFeesOverAssets	0.75%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.30%
Other expenses	rr_OtherExpensesOverAssets	1.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.07%
Fee waivers and expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.82%)	^[2]
Total annual fund operating expenses after fee waivers and expense reimbursements	rr_NetExpensesOverAssets	1.25%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	695
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	1,112
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,553
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,776
Annual Return 2009	rr_AnnualReturn2009	29.84%
Annual Return 2010	rr_AnnualReturn2010	27.63%
Annual Return 2011	rr_AnnualReturn2011	(5.77%)
Annual Return 2012	rr_AnnualReturn2012	13.14%
Highest Quarterly Return, Label	rr_HighestQuarterlyReturnLabel	highest quarterly return was 18.38% for the quarter ended September 30, 2009
Highest Quarterly Return, Date	rr_BarChartHighestQuarterlyReturnDate	Sep. 30, 2009
Highest Quarterly Return	rr_BarChartHighestQuarterlyReturn	18.38%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	lowest quarterly return was -22.26% for the quarter ended September 30, 2011
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Sep. 30, 2011
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(22.26%)
Label	rr_AverageAnnualReturnLabel	(lifetime: 2/1/08 - 12/31/12)
1 Year	rr_AverageAnnualReturnYear01	6.68%
Lifetime	rr_AverageAnnualReturnSinceInception	2.24%
(Delaware Mid Cap Value Fund) \| Class A \| return after taxes on distributions
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	6.15%
Lifetime	rr_AverageAnnualReturnSinceInception	2.09%
(Delaware Mid Cap Value Fund) \| Class A \| return after taxes on distributions and sale of Fund shares
Risk/Return:	rr_RiskReturnAbstract
1 Year	rr_AverageAnnualReturnYear01	5.06%
Lifetime	rr_AverageAnnualReturnSinceInception	1.90%
(Delaware Mid Cap Value Fund) \| Class C
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases as a percentage of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower	rr_MaximumDeferredSalesChargeOverOfferingPrice	1.00%	^[1]
Management fees	rr_ManagementFeesOverAssets	0.75%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	1.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.77%
Fee waivers and expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.77%)	^[2]
Total annual fund operating expenses after fee waivers and expense reimbursements	rr_NetExpensesOverAssets	2.00%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	303
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	786
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,396
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	3,043
Expense Example, No Redemption, 1 Year	rr_ExpenseExampleNoRedemptionYear01	203
Expense Example, No Redemption, 3 Years	rr_ExpenseExampleNoRedemptionYear03	786
Expense Example, No Redemption, 5 Years	rr_ExpenseExampleNoRedemptionYear05	1,396
Expense Example, No Redemption, 10 Years	rr_ExpenseExampleNoRedemptionYear10	3,043
Label	rr_AverageAnnualReturnLabel	(lifetime: 7/31/08 - 12/31/12)
1 Year	rr_AverageAnnualReturnYear01	11.23%
Lifetime	rr_AverageAnnualReturnSinceInception	3.81%
(Delaware Mid Cap Value Fund) \| Institutional Class
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases as a percentage of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Management fees	rr_ManagementFeesOverAssets	0.75%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	none
Other expenses	rr_OtherExpensesOverAssets	1.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	1.77%
Fee waivers and expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.77%)	^[2]
Total annual fund operating expenses after fee waivers and expense reimbursements	rr_NetExpensesOverAssets	1.00%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	102
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	482
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	887
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,020
Label	rr_AverageAnnualReturnLabel	(lifetime: 2/1/08-12/31/12)
1 Year	rr_AverageAnnualReturnYear01	13.40%
Lifetime	rr_AverageAnnualReturnSinceInception	3.71%
(Delaware Mid Cap Value Fund) \| Class R
Risk/Return:	rr_RiskReturnAbstract
Maximum sales charge (load) imposed on purchases as a percentage of offering price	rr_MaximumSalesChargeImposedOnPurchasesOverOfferingPrice	none
Maximum contingent deferred sales charge (load) as a percentage of original purchase price or redemption price, whichever is lower	rr_MaximumDeferredSalesChargeOverOfferingPrice	none
Management fees	rr_ManagementFeesOverAssets	0.75%
Distribution and service (12b-1) fees	rr_DistributionAndService12b1FeesOverAssets	0.60%
Other expenses	rr_OtherExpensesOverAssets	1.02%
Total annual fund operating expenses	rr_ExpensesOverAssets	2.37%
Fee waivers and expense reimbursements	rr_FeeWaiverOrReimbursementOverAssets	(0.87%)	^[2]
Total annual fund operating expenses after fee waivers and expense reimbursements	rr_NetExpensesOverAssets	1.50%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	153
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	656
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	1,187
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	2,640
Label	rr_AverageAnnualReturnLabel	(lifetime: 7/31/08 - 12/31/12)
1 Year	rr_AverageAnnualReturnYear01	12.85%
Lifetime	rr_AverageAnnualReturnSinceInception	4.46%

[1]

Class C shares redeemed within one year of purchase are subject to a 1.00% contingent deferred sales charge (CDSC).

[2]

XML 17 R13.htm IDEA: XBRL DOCUMENT

Average Annual Total Returns (dei_DocumentInformationDocumentAxis, (Delaware Mid Cap Value Fund))	0 Months Ended
	Feb. 28, 2013
Russell Midcap® Value Index (reflects no deduction for fees, expenses, or taxes)
Average Annual Return:
1 Year	18.50%
Lifetime	4.85%
Class A
Average Annual Return:
Label	(lifetime: 2/1/08 - 12/31/12)
1 Year	6.68%
Lifetime	2.24%
Class A \| return after taxes on distributions
Average Annual Return:
1 Year	6.15%
Lifetime	2.09%
Class A \| return after taxes on distributions and sale of Fund shares
Average Annual Return:
1 Year	5.06%
Lifetime	1.90%
Class C
Average Annual Return:
Label	(lifetime: 7/31/08 - 12/31/12)
1 Year	11.23%
Lifetime	3.81%
Institutional Class
Average Annual Return:
Label	(lifetime: 2/1/08-12/31/12)
1 Year	13.40%
Lifetime	3.71%
Class R
Average Annual Return:
Label	(lifetime: 7/31/08 - 12/31/12)
1 Year	12.85%
Lifetime	4.46%