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Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading OneAmerica Socially Responsive Portfolio
Objective [Heading] rr_ObjectiveHeading Investment Objective:
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

Seeks to provide long-term capital appreciation
Objective, Secondary [Text Block] rr_ObjectiveSecondaryTextBlock

and current investment income as a secondary objective.

Expense [Heading] rr_ExpenseHeading Fees and Expenses of the Portfolio:
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. The table does not reflect charges and fees associated with a separate account that invests in the Portfolio or any insurance contract for which the Portfolio is an investment option. If such charges and fees were included, the fees and expenses shown below would be higher.

Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Portfolio Operating Expenses as of December 31, 2012 (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 2014-05-01
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover:
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. These costs, which are not reflected in annual Portfolio operating expenses or in this example, affect the Portfolio's performance. During the most recent fiscal year, the Portfolio's turnover rate was 6 percent of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 6.00%
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 percent return each year and that the Portfolio's operating expenses remain the same. If separate account and/or insurance contract fees and charges were reflected, expenses would be higher. 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 primarily invests in equity securities that are selected based on fundamental investment research and long-term growth prospects, attractive relative valuations and sensitivity to socially responsible principles. The Portfolio uses a "multi-capitalization" approach, meaning it may invest in companies of any size, from large, well-established companies to smaller companies with market capitalizations below one billion dollars, and may change the composition of its investments depending on the outlook for the economic environment and the markets. The Portfolio may also invest in securities issued by foreign companies.


The Portfolio focuses on securities of companies that are sensitive to socially responsible principles, although the social criteria for the Portfolio are not fundamental and may be changed without the approval of shareholders.


In particular, the Portfolio will typically avoid investments in the following types of companies:


•  Companies that are engaged in the manufacture of tobacco;


•  Companies that derive a significant portion of their revenues from the manufacture of alcohol;


•  Companies that are involved in gambling as a primary line of business;


•  Companies whose activities include direct participation in abortion; and


•  Companies that derive a significant portion of their revenues from activities that promote pornography.


In addition to extensive fundamental analysis, the Investment Adviser also uses technical analysis. Its purpose is not to make investment decisions, but rather to assist in the timing of trading decisions.

Risk [Heading] rr_RiskHeading Principal Risks of Investing in the Portfolio:
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

An investment in the Portfolio involves risk, including possible loss of the principal amount invested; therefore, you could lose money by investing in the Portfolio. The Portfolio is subject to the general risk that its investment objective or objectives will not be achieved, or that a portfolio manager will make investment decisions or use strategies that do not accomplish their intended goals. In addition, the principal risks of investing in the Portfolio are:


•  Capitalization Risk. The Portfolio may be particularly subject to the potential risks and volatility of investing in equities. During an overall stock market decline, stock prices of small or medium-capitalization companies often fluctuate more and may fall more than stock prices of larger-capitalization companies. To the extent that the Portfolio invests in stocks of small and medium-capitalization companies, stocks of those companies have sometimes gone through extended periods of outperformance and underperformance relative to larger-capitalization companies. While potentially offering greater opportunities for capital growth than larger, more established companies, the equities of smaller companies may be particularly volatile, especially during periods of economic uncertainty. These companies may face less certain growth prospects, or depend heavily on a limited line of products and services or the efforts of a small number of key management personnel.


•  Foreign Investment Risk. The Portfolio may invest in equity securities issued by foreign companies, which may pose a greater degree of risk. Foreign companies may be subject to disclosure, accounting, auditing and financial reporting standards and practices that are different from those to which U.S. issuers are subject. Accordingly, the Portfolio may not have access to adequate or reliable company information. In addition, political, economic and social developments in foreign countries and fluctuations in currency exchange rates may affect the operations of foreign companies or the value of their securities. Risks posed by investing in the equities of foreign issuers may be particularly acute with respect to issuers located in lesser developed, emerging market countries.


•  Issuer Risk. The value of a security may decline for a number of reasons which directly relate to the general economic or political conditions or to the issuer, such as management performance, financial leverage, operating leverage and reduced demand for the issuer's goods or services.


•  Manager Risk. The manager's selection of securities for the Portfolio may cause the Portfolio to underperform other funds or benchmarks.


•  Market Risk. Although equities historically have outperformed other asset classes over the long-term, their prices tend to fluctuate more dramatically over the shorter term. These movements may result from factors affecting individual companies, or from broader influences like changes in interest rates, market conditions, investor confidence or announcements of economic, political or financial information.


•  Socially Responsible Investing Risk. There is a risk that, due to the inclusion of social criteria in selecting securities, the return of the Portfolio may be lower than if investment decisions were based solely on investment considerations.


•  Style Risk. If at any time the market does not favor the Portfolio's investment style, the Portfolio's gains may not be as big as, or its losses may be bigger than, other equity funds using different investment styles.

Risk Lose Money [Text] rr_RiskLoseMoney An investment in the Portfolio involves risk, including possible loss of the principal amount invested; therefore, you could lose money by investing in the Portfolio.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance Information:
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The bar chart and tables below provide some indication of the risks of investing in the Socially Responsive Portfolio. The bar chart shows changes in the Portfolio's performance from year to year since its inception. Performance numbers shown in the Average Annual Total Returns table demonstrate the average annual total return of the Portfolio as of December 31, 2012, compared to the Standard & Poor's 500 Composite Stock Price Index (the "S&P 500® Index") for one (1) year, five (5) years and Since Inception. Investors cannot directly invest in an index and unlike the Portfolio, an index is unmanaged and does not incur transaction or other expenses. The information does not reflect charges and fees associated with a separate account that invests in the Portfolio or any insurance contract for which the Portfolio is an investment option. These charges and fees will reduce returns. The Portfolio's past performance is not necessarily indicative of how the Portfolio will perform in the future.

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and tables below provide some indication of the risks of investing in the Socially Responsive Portfolio.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Portfolio's past performance is not necessarily indicative of how the Portfolio will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Annual Returns, Class O Shares (by calendar year 2007-2012)
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

Highest/Lowest quarterly results during this time period for the Class O shares were:


Highest: 19.2 percent (quarter ended September 30, 2009)  Lowest: -24.2 percent (quarter ended December 31, 2008)

Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Highest:
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Sep. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 19.20%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Lowest:
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (24.20%)
Caption rr_AverageAnnualReturnCaption Average Annual Total Returns (for the periods ended December 31, 2012)
S&P 500® Index
  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 16.00%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 1.66%
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 3.64%
Class O
  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.70%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.98%
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 1.68%
Less Expense Waiver/Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.48%) [1]
Total Annual Portfolio Operating Expenses After Expense Waiver/Reimbursement rr_NetExpensesOverAssets 1.20%
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 659
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,451
Annual Return 2007 rr_AnnualReturn2007 3.47%
Annual Return 2008 rr_AnnualReturn2008 (36.80%)
Annual Return 2009 rr_AnnualReturn2009 30.93%
Annual Return 2010 rr_AnnualReturn2010 11.20%
Annual Return 2011 rr_AnnualReturn2011 (3.49%)
Annual Return 2012 rr_AnnualReturn2012 10.99%
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 10.99%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 (0.29%)
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 0.67%
Adviser Class
  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.70%
Distribution and/or Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.30%
Other Expenses rr_OtherExpensesOverAssets 0.98%
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 1.98%
Less Expense Waiver/Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.48%) [1]
Total Annual Portfolio Operating Expenses After Expense Waiver/Reimbursement rr_NetExpensesOverAssets 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 817
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 1,785
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 10.66%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 (0.59%)
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 0.36%
[1] OAM, as Investment Adviser for the OneAmerica Socially Responsive Portfolio, has contractually undertaken to limit the Portfolio's expenses through, May 1, 2014 by waiving fees and/or reimbursing certain expenses of the Fund so that the Portfolio's total annual ordinary operating expenses do not exceed 1.20 percent for Class O Shares and 1.50 percent for Advisor Class Shares.