Advisory Fees Paid, Amount Annual or Semi-Annual Statement Document Type Fiscal Year End Registrant CIK Statement [Line Items] TOP EQUITY / ETF HOLDINGS PNC Financial Svcs Group Inc Represents the PNC Financial Svcs Group Inc, during the indicated time period. Largest Holding [Axis] Class Name Apple Inc Represents the Apple Inc, during the indicated time period. SPDR S&P 500 ETF Trust Represents the SPDR S&P 500 ETF Trust, during the indicated time period. Additional Information Phone Number Document Period End Date Share Classes Alphabet Inc Represents the Alphabet Inc, during the indicated time period. Fund Name Holdings Count Series [Axis] Expenses Paid, Amount Volumetric Fund Represents the Volumetric Fund, during the indicated time period. Details Amendment Flag Wabtec Corp Represents the Wabtec Corp, during the indicated time period. Additional Information Email Registrant Name Class [Axis] Statement Bank of New York Mellon Corp Represents the Bank of New York Mellon Corp, during the indicated time period. Details {1} Details Items Largest Holdings Marvell Technology Inc Represents the Marvell Technology Inc, during the indicated time period. Expense Ratio, Percent Accountant Change Disagreements Net Assets C000032757 Represents the C000032757, during the indicated time period. Applied Materials Inc Represents the Applied Materials Inc, during the indicated time period. Investment Company, Portfolio Turnover Trading Symbol Series Emerson Electric Co Represents the Emerson Electric Co, during the indicated time period. Applied Industrial Tech Inc Represents the Applied Industrial Tech Inc, during the indicated time period. Additional Information Website Shareholder Report Annual or Semi-Annual