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Label Element Value
Stock Portfolio  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading Stock Portfolio
Objective [Heading] rr_ObjectiveHeading Investment Goal
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Portfolio’s investment goal is long-term capital appreciation,
Objective, Secondary [Text Block] rr_ObjectiveSecondaryTextBlock

with a secondary objective of increasing dividend income.

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 Portfolio’s annual operating expenses do not reflect the separate account fees charged in the variable annuity or variable life insurance policy (“Variable Contracts”), in which the Portfolio is offered. If the separate account’s fees were shown, the Portfolio’s annual operating expenses would be higher. Please see your Variable Contract prospectus for more details on the separate account fees.

Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or “turns over” its portfolio). A higher portfolio turnover rate may indicate higher transaction costs. These costs, which are not reflected in annual portfolio operating expenses or in the example, affect the Portfolio’s performance. During the most recent fiscal year, the Portfolio’s portfolio turnover rate was 32% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 32.00%
Expense Example [Heading] rr_ExpenseExampleHeading Expense Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

This Example is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Portfolio for the time periods indicated and then redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return each year and that the Portfolio’s operating expenses remain the same. The Example does not reflect charges imposed by the Variable Contract. If the Variable Contract fees were reflected, the expenses would be higher. See the Variable Contract prospectus for information on such charges. Although your actual costs may be higher or lower, based on these assumptions and the net expenses shown in the fee table, your costs would be:

Strategy [Heading] rr_StrategyHeading Principal Investment Strategies of the Portfolio
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

The Portfolio attempts to achieve its investment goal by investing, under normal circumstances, at least 80% of net assets in common stocks of a diversified group of growth companies.


The Portfolio generally seeks investments in stocks of large-capitalization companies with one or more of the following characteristics: strong cash flow and an above-average rate of earnings growth; the ability to sustain earnings momentum during economic downturns; and occupation of a lucrative niche in the economy and the ability to expand even during times of slow economic growth. As growth investors, the Portfolio management believes that when a company increases its earnings faster than both inflation and the overall growth rate of the economy, the market will eventually reward it with a higher stock price. The Portfolio at times may invest significantly in technology stocks.


In pursuing its investment objective, the Portfolio has the discretion to deviate from its normal investment criteria, as previously described, and purchase securities that the Portfolio’s management believes will provide an opportunity for substantial appreciation. These situations might arise when the Portfolio’s management believes a security could increase in value for a variety of reasons, including an extraordinary corporate event, a new product introduction or innovation, a favorable competitive development, or a change in management.


The Portfolio may also invest in short-term investments (up to 20%) and foreign securities (up to 30%).

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

There can be no assurance that the Portfolio’s investment goal will be met or that the net return on an investment in the Portfolio will exceed what could have been obtained through other investment or savings vehicles. Shares of the Portfolio are not bank deposits and are not guaranteed or insured by any bank, government entity or the Federal Deposit Insurance Corporation. As with any mutual fund, there is no guarantee that the Portfolio will be able to achieve its investment goal. If the value of the assets of the Portfolio goes down, you could lose money.


The following is a summary description of the principal risks of investing in the Portfolio.


Management Risk. The Portfolio is subject to management risk because it is an actively managed investment portfolio. The Portfolio’s portfolio managers apply investment techniques and risk analyses in making investment decisions, but there can be no guarantee that these decisions or individual securities selected by the portfolio managers will produce the desired results.


Equity Securities Risk. The Portfolio invests principally in equity securities and is therefore subject to the risk that stock prices will fall and may underperform other asset classes. Individual stock prices fluctuate from day-to-day and may decline significantly.


Growth Stock Risk. The Portfolio invests substantially in growth-style stocks. Growth stocks may lack the dividend yield associated with value stocks that can cushion total return in a bear market. Also, growth stocks normally carry a higher price/earnings ratio than many other stocks. Consequently, if earnings expectations are not met, the market price of growth stocks will often go down more than other stocks.


Foreign Investment Risk. The Portfolio’s investments in securities of foreign issuers or issuers with significant exposure to foreign markets involve additional risk. Foreign countries in which the Portfolio invests may have markets that are less liquid, less regulated and more volatile than U.S. markets. The value of the Portfolio’s investments may decline because of factors affecting the particular issuer as well as foreign markets and issuers generally, such as unfavorable government actions, and political or financial instability. Lack of information may also affect the value of these securities. The risks of foreign investments are heightened when investing in issuers in emerging market countries.


Investment Style Risk. Different investment styles tend to shift in and out of favor, depending on market conditions and investor sentiment. Because a Portfolio may hold stocks with both growth and value characteristics, it could underperform other stock Portfolios that take a strictly growth or value approach to investing when one style is currently in favor. Growth stocks tend to be more volatile than the overall stock market and can have sharp price declines as a result of earnings disappointments. Value stocks carry the risk that the market will not recognize their intrinsic value or that they are actually appropriately priced at a low level.


Market Risk. The Portfolio’s share price can fall because of weakness in the broad market, a particular industry, or specific holdings. The market as a whole can decline for many reasons, including adverse political or economic developments in the U.S. or abroad, changes in investor psychology, or heavy institutional selling. In addition, the subadviser’s assessment of companies held in the Portfolio may prove incorrect, resulting in losses or poor performance even in a rising market.


Technology Sector Risk. There are numerous risks and uncertainties involved in investing in the technology sector. Historically, the price of securities in this sector have tended to be volatile. A Portfolio that invests primarily in technology-related issuers bears an additional risk that economic events may affect a substantial portion of the Portfolio’s investments. In addition, at times equity securities of technology-related issuers may underperform relative to other sectors. The technology sector includes companies from various industries, including computer hardware, software, semiconductors, telecommunications, electronics, aerospace and defense, health care equipment and biotechnology, among others.


Issuer Risk. The value of a security may decline for a number of reasons directly related to the issuer, such as management performance, financial leverage and reduced demand for the issuer’s goods and services.

Risk Lose Money [Text] rr_RiskLoseMoney If the value of the assets of the Portfolio goes down, you could lose money.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution Shares of the Portfolio are not bank deposits and are not guaranteed or insured by any bank, government entity or the Federal Deposit Insurance Corporation.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance Information
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The following Risk/Return Bar Chart and Table illustrate the risks of investing in Class 1 shares of the Portfolio by showing changes in the Portfolio’s performance from calendar year to calendar year and comparing the Portfolio’s average annual returns to those of the Russell 1000® Growth Index. Fees and expenses incurred at the contract level are not reflected in the bar chart or table. If these amounts were reflected, returns would be less than those shown. Of course, past performance is not necessarily an indication of how the Portfolio will perform in the future.

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The following Risk/Return Bar Chart and Table illustrate the risks of investing in Class 1 shares of the Portfolio by showing changes in the Portfolio’s performance from calendar year to calendar year and comparing the Portfolio’s average annual returns to those of the Russell 1000® Growth Index.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Of course, past performance is not necessarily an indication of how the Portfolio will perform in the future.
Bar Chart [Heading] rr_BarChartHeading (Class 1 Shares)
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

During the 10-year period shown in the bar chart, the highest return for a quarter was 19.03% (quarter ended March 31, 2012) and the lowest return for a quarter was -23.37% (quarter ended December 31, 2008). The year-to-date calendar return as of June 30, 2015 was 6.96%.

Year to Date Return, Label rr_YearToDateReturnLabel The year-to-date calendar return
Bar Chart, Year to Date Return, Date rr_BarChartYearToDateReturnDate Jun. 30, 2015
Bar Chart, Year to Date Return rr_BarChartYearToDateReturn 6.96%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel highest return
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Mar. 31, 2012
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 19.03%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel lowest return
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (23.37%)
Caption rr_AverageAnnualReturnCaption Average Annual Total Returns (For the periods ended December 31, 2014)
Stock Portfolio | Russell 1000® Growth Index  
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 13.05%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 15.81%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 8.49%
Stock Portfolio | Class 1  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.83%
Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.05%
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 0.88%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 90
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 281
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 488
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,084
Annual Return 2005 rr_AnnualReturn2005 5.99%
Annual Return 2006 rr_AnnualReturn2006 13.68%
Annual Return 2007 rr_AnnualReturn2007 10.33%
Annual Return 2008 rr_AnnualReturn2008 (42.14%)
Annual Return 2009 rr_AnnualReturn2009 42.09%
Annual Return 2010 rr_AnnualReturn2010 16.68%
Annual Return 2011 rr_AnnualReturn2011 (1.61%)
Annual Return 2012 rr_AnnualReturn2012 18.42%
Annual Return 2013 rr_AnnualReturn2013 38.40%
Annual Return 2014 rr_AnnualReturn2014 8.56%
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 8.56%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 15.35%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 8.36%
Stock Portfolio | Class 2  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.83%
Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.15%
Other Expenses rr_OtherExpensesOverAssets 0.05%
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 1.03%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 105
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 328
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 569
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,259
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 8.42%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 15.19%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 8.20%
Stock Portfolio | Class 3  
Risk/Return: rr_RiskReturnAbstract  
Management Fees rr_ManagementFeesOverAssets 0.83%
Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses rr_OtherExpensesOverAssets 0.05%
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 1.13%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 115
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 359
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 622
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,375
Average Annual Returns, 1 Year rr_AverageAnnualReturnYear01 8.30%
Average Annual Returns, 5 Years rr_AverageAnnualReturnYear05 15.06%
Average Annual Returns, 10 Years rr_AverageAnnualReturnYear10 8.09%