Label	Element	Value
Risk/Return:	rr_RiskReturnAbstract
Risk/Return [Heading]	rr_RiskReturnHeading	OneAmerica Value 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	The Portfolio seeks current investment income as a secondary objective.
Expense [Heading]	rr_ExpenseHeading	Fees and Expenses of the Portfolio:
Expense Narrative [Text Block]	rr_ExpenseNarrativeTextBlock	This 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)
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 8 percent of the average value of its portfolio.
Portfolio Turnover, Rate	rr_PortfolioTurnoverRate	8.00%
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 Value Portfolio invests primarily in equity securities selected on the basis of fundamental investment research for their long-term appreciation potential. Using a bottom-up approach, the Portfolio concentrates on companies which appear undervalued compared to the market and their own historic valuation levels. Both quantitative and qualitative tools are utilized focusing on a "value" based equity strategy. Important valuation criteria include price to sales, price to cash flow, price to adjusted earnings, profitability, capital adequacy and growth potential. The Portfolio also focuses on management ability, insider ownership, industry position and liquidity of the underlying equity issues. 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. The Portfolio may also invest in securities issued by foreign companies.
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 small or 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. • *Value Investing / 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. As a category, value stocks may underperform growth stocks (and the stock market as a whole) over any period of time. In addition, value stocks selected for investment by the Portfolio managers may not perform as anticipated because stocks that appear undervalued may remain undervalued indefinitely, or may, in fact, be fairly valued.
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 Value Portfolio. The bar chart shows changes in the Portfolio's performance from year to year for the last ten (10) years. 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 ten (10) years. Investors cannot directly invest in an index and unlike the Portfolio; an index is unmanaged and does not incur transaction or other expenses. Performance information for the Advisor Class shares prior to March 31, 2003 represents performance for the Portfolio's Class O shares, adjusted to reflect distribution and/or service (12b-1) fees and other expenses paid by the Advisor Class shares. Although Class O and the Advisor Class shares would have similar annual returns (because all the Portfolio's shares represent interests in the same portfolio of securities), Advisor Class performance would be lower than Class O performance because of the lower expenses paid by Class O shares. 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 Value 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 2003-2012)
Bar Chart Closing [Text Block]	rr_BarChartClosingTextBlock	Highest/Lowest quarterly results during this time period for the Class O shares were: Highest: 18.6 percent (quarter ended September 30, 2009) Lowest: -24.1 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	18.60%
Lowest Quarterly Return, Label	rr_LowestQuarterlyReturnLabel	Lowest:
Lowest Quarterly Return, Date	rr_BarChartLowestQuarterlyReturnDate	Dec. 31, 2008
Lowest Quarterly Return	rr_BarChartLowestQuarterlyReturn	(24.10%)
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, 10 Years	rr_AverageAnnualReturnYear10	7.10%
Class O
Risk/Return:	rr_RiskReturnAbstract
Management Fees	rr_ManagementFeesOverAssets	0.50%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	none
Other Expenses	rr_OtherExpensesOverAssets	0.08%
Total Annual Portfolio Operating Expenses	rr_ExpensesOverAssets	0.58%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	59
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	186
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	324
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	725
Annual Return 2003	rr_AnnualReturn2003	36.49%
Annual Return 2004	rr_AnnualReturn2004	14.98%
Annual Return 2005	rr_AnnualReturn2005	9.88%
Annual Return 2006	rr_AnnualReturn2006	13.54%
Annual Return 2007	rr_AnnualReturn2007	3.58%
Annual Return 2008	rr_AnnualReturn2008	(36.94%)
Annual Return 2009	rr_AnnualReturn2009	30.31%
Annual Return 2010	rr_AnnualReturn2010	13.54%
Annual Return 2011	rr_AnnualReturn2011	(2.36%)
Annual Return 2012	rr_AnnualReturn2012	13.34%
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	13.34%
Average Annual Returns, 5 Years	rr_AverageAnnualReturnYear05	0.64%
Average Annual Returns, 10 Years	rr_AverageAnnualReturnYear10	7.67%
Advisor Class
Risk/Return:	rr_RiskReturnAbstract
Management Fees	rr_ManagementFeesOverAssets	0.50%
Distribution and/or Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.30%
Other Expenses	rr_OtherExpensesOverAssets	0.08%
Total Annual Portfolio Operating Expenses	rr_ExpensesOverAssets	0.88%
Expense Example, with Redemption, 1 Year	rr_ExpenseExampleYear01	90
Expense Example, with Redemption, 3 Years	rr_ExpenseExampleYear03	280
Expense Example, with Redemption, 5 Years	rr_ExpenseExampleYear05	487
Expense Example, with Redemption, 10 Years	rr_ExpenseExampleYear10	1,081
Average Annual Returns, 1 Year	rr_AverageAnnualReturnYear01	13.00%
Average Annual Returns, 5 Years	rr_AverageAnnualReturnYear05	0.34%
Average Annual Returns, 10 Years	rr_AverageAnnualReturnYear10	7.35%

If the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Form

-Number N-1A

-Chapter A

-Section 4

-Subsection b

-Paragraph 2

-Subparagraph instructions

-Clause 3

-Exhibit a