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Money Market Fund  
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading FUND SUMMARY:  MONEY MARKET FUND
Objective [Heading] rr_ObjectiveHeading Investment Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock The Money Market Fund (the “Fund”) seeks current income, while preserving capital and liquidity.
Expense [Heading] rr_ExpenseHeading Fund Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock
This table describes the fees and expenses that you may pay if you buy, hold and sell shares of the Fund. You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the table and Example below. Additional fees and expenses will be applied at the variable annuity contract or variable life insurance policy (each, a “variable contract”) level. Those fees and expenses are described in your variable contract prospectus. If the information below were to reflect the deduction of variable contract charges, fees and expenses would be higher.
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)
Expenses Not Correlated to Ratio Due to Acquired Fund Fees [Text] rr_ExpensesNotCorrelatedToRatioDueToAcquiredFundFees The Total Annual Fund Operating Expenses in this fee table may not correlate to the expense ratios in the Fund’s financial highlights and financial statements because the financial highlights and financial statements reflect only the operating expenses of the Fund and do not include Acquired Fund Fees and Expenses, which are fees and expenses incurred indirectly by the Fund through its investments in certain underlying investment companies.
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 does not reflect expenses and charges which are, or may be, imposed under your variable contract. If the examples were to reflect the deduction of such charges, the costs shown would be greater. The example assumes that you invest $10,000 in the Fund for the time periods indicated and then redeem or hold 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 Fund’s operating expenses remain the same. Although your actual costs and returns might be higher or lower, based on these assumptions your costs would be:
Strategy [Heading] rr_StrategyHeading Principal Investment Strategy
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock
The Fund will invest no less than 99.5% of its total assets in government securities, cash or repurchase agreements that are collateralized fully by government securities or cash.
Government securities generally are securities that are issued or guaranteed as to principal and interest by the U.S. Government or by one of its agencies or instrumentalities. Some government securities are backed by the full faith and credit of the U.S. Government. Some government securities are not backed by the full faith and credit of the U.S. Government but rather are supported by the issuer’s ability to borrow from the U.S. Treasury, by only the credit of the issuer, or by the United States in some other way. The Fund intends to operate as a “government money market fund” in compliance with Rule 2a‑7 under the Investment Company Act of 1940, as amended (the “1940 Act”).
  
Under Rule 2a‑7, the Fund may invest only in U.S. dollar-denominated securities that are determined to present minimal credit risk and meet certain other criteria, including relating to maturity, diversification, liquidity and credit quality. For example, the Fund invests in securities that generally have remaining maturities of 397 days or less and will have a dollar-weighted average portfolio maturity of 60 days or less and a dollar-weighted average life to maturity of 120 days or less. The Fund also maintains sufficient portfolio liquidity to meet reasonably foreseeable redemption requests. The Fund seeks to maintain a stable net asset value (“NAV”) of $1.00 per share and its portfolio is valued using the amortized cost method as permitted by Rule 2a‑7. As a government money market fund, the Fund is not required to impose liquidity fees or redemptions gates. The Fund’s Board, however, may elect to impose such fees or gates in the future if it believes such measures are appropriate and in the best interests of the Fund and its shareholders. 
Risk [Heading] rr_RiskHeading Principal Risks of Investing
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock
As with all mutual funds, an investor is subject to the risk that his or her investment could lose money. In addition to this risk, the Fund is subject to the principal risks described below.
U.S. Government Securities Risk.  The possibility that the U.S. government will not provide financial assistance in support of securities issued by certain of its agencies and instrumentalities and held by the Fund if it is not obligated to do so because such securities are not issued or guaranteed by the U.S. Treasury. A default by a U.S. government agency or instrumentality could cause the Fund’s share price or yield to fall.
Liquidity Risk.  The possibility that the market for certain of the Fund’s investments may become illiquid under adverse or volatile market or economic conditions, making those investments difficult to sell at an advantageous price, particularly in times of market turmoil. The market price of certain investments may fall dramatically if there is no liquid trading market for the investments. Illiquid securities may also be more difficult to value. If the Fund is forced to sell an illiquid security to fund redemptions or for other cash needs, it may be forced to sell the security at a loss.
Interest Rate Risk.  The possibility that the prices of the Fund’s fixed income investments will decline due to rising interest rates.
Redemption Risk.  The possibility that large redemptions may cause the Fund to sell its securities at inopportune times resulting in a loss to the Fund.
Investment Risk.  You could lose money by investing in the Fund. Although the Fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency. Penn Mutual Asset Management, LLC (“PMAM” or the “Adviser”), the Fund’s sponsor, and its affiliates have no legal obligation to provide financial support to the Fund, and you should not expect that PMAM or its affiliates will provide financial support to the Fund at any time.
Credit Risk.  The possibility that an issuer of a debt security held by the Fund defaults on its payment obligations. While the Fund tries to minimize this risk by investing in high-quality securities, the credit quality of such securities may change rapidly in certain market environments and in response to certain market events, such as a decline in the credit quality of an issuer.
Income Risk.  The possibility that the Fund’s yield (the rate of dividends the Fund pays) may decline in the event of declining interest rates.
Counterparty Risk.  The possibility that a party to a transaction involving the Fund may fail to meet its obligations thereby causing the Fund to lose money or the benefit of the transaction or preventing the Fund from selling or buying other securities to implement its investment strategies.
 
Risk Lose Money [Text] rr_RiskLoseMoney You could lose money by investing in the Fund.
Risk Money Market Fund May Not Preserve Dollar [Text] rr_RiskMoneyMarketFundMayNotPreserveDollar Although the Fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so.
RIsk Not Insured [Text] rr_RiskNotInsured An investment in the Fund is not insured or guaranteed by the Federal Deposit Insurance Corporation (FDIC) or any other government agency.
Risk Money Market Fund Sponsor May Not Provide Support [Text] rr_RiskMoneyMarketFundSponsorMayNotProvideSupport Penn Mutual Asset Management, LLC (“PMAM” or the “Adviser”), the Fund’s sponsor, and its affiliates have no legal obligation to provide financial support to the Fund, and you should not expect that PMAM or its affiliates will provide financial support to the Fund at any time.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance Information
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock
The bar chart and table below show the performance of the Fund both year‑by‑year and as an average over different periods of time. Prior to May 1, 2016, the Fund invested in a diversified portfolio of high-quality money market instruments of a variety of issuers. Effective May 1, 2016, the Fund operates as a “government money market fund” and as such is limited to investing 99.5% of its total assets in government securities, cash or repurchase agreements that are collateralized fully by government securities or cash. Accordingly, the performance information below may have been different if the current investment strategy had been in effect during the period prior to the Fund’s conversion to a government money market fund. The bar chart and table demonstrate the variability of performance over time and provide an indication of the risks and volatility of an investment in the Fund. Past performance does not necessarily indicate how the Fund will perform in the future. This performance information does not include the impact of any charges deducted under your variable contract. If it did, returns would be lower. The current yield of the Money Market Fund for the seven‑day period ended December 31, 2021 was 0.01%. 
Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table demonstrate the variability of performance over time and provide an indication of the risks and volatility of an investment in the Fund.
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture Past performance does not necessarily indicate how the Fund will perform in the future.
Bar Chart Does Not Reflect Sales Loads [Text] rr_BarChartDoesNotReflectSalesLoads This performance information does not include the impact of any charges deducted under your variable contract. If it did, returns would be lower.
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock
Best Quarter    Worst Quarter
0.45%    0.00%
6/30/2019    12/31/2021
Performance Table Heading rr_PerformanceTableHeading Average Annual Total Return (for Periods Ended December 31, 2021)
Money Market Seven Day Yield, Caption [Text] rr_MoneyMarketSevenDayYieldCaption The current yield of the Money Market Fund for the seven‑day period ended December 31, 2021 was 0.01%.
Money Market Fund | Money Market Fund  
Risk/Return: rr_RiskReturnAbstract  
Investment Advisory Fees rr_ManagementFeesOverAssets 0.33%
Distribution (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.24%
Acquired Fund Fees and Expenses rr_AcquiredFundFeesAndExpensesOverAssets 0.01%
Total Annual Fund Operating Expenses rr_ExpensesOverAssets 0.58% [1]
1 Year rr_ExpenseExampleYear01 $ 59
3 Years rr_ExpenseExampleYear03 186
5 Years rr_ExpenseExampleYear05 324
10 Years rr_ExpenseExampleYear10 $ 726
2012 rr_AnnualReturn2012 0.01%
2013 rr_AnnualReturn2013 0.01%
2014 rr_AnnualReturn2014 0.01%
2015 rr_AnnualReturn2015 0.01%
2016 rr_AnnualReturn2016 0.01%
2017 rr_AnnualReturn2017 0.01%
2018 rr_AnnualReturn2018 0.55%
2019 rr_AnnualReturn2019 1.61%
2020 rr_AnnualReturn2020 0.24%
2021 rr_AnnualReturn2021 0.01%
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel Best Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2019
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 0.45%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Worst Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2021
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn none
1 Year rr_AverageAnnualReturnYear01 0.01%
5 Years rr_AverageAnnualReturnYear05 0.48%
10 Years rr_AverageAnnualReturnYear10 0.25%
Money Market Seven Day Yield rr_MoneyMarketSevenDayYield 0.01%
[1]
The Total Annual Fund Operating Expenses in this fee table may not correlate to the expense ratios in the Fund’s financial highlights and financial statements because the financial highlights and financial statements reflect only the operating expenses of the Fund and do not include Acquired Fund Fees and Expenses, which are fees and expenses incurred indirectly by the Fund through its investments in certain underlying investment companies.