Atlas America Fund Market Risk – Equities [Member] Real Estate Risk [Member] REIT Risk [Member] Gold Risk [Member] Municipal Securities Risk [Member] Corporate Debt Securities Risk [Member] Models and Data Risk [Member] New/Smaller Fund Risk [Member] Derivatives Risk [Member] Forward Contracts Risk [Member] Futures Contracts Risk [Member] Options Risk [Member] Swap Agreement Risk [Member] Structured Securities Risk [Member] Commodity-Linked Derivatives Risk [Member] Commodity-Linked Derivatives Tax Risk [Member] Valuation Risk [Member] Investment Company and Exchange-Traded Fund Risk [Member] Agricultural Commodities Risk [Member] Treasury Inflation Protected Securities Risk ("TIPS") [Member] U.S. Government Securities Risk [Member] Counterparty Risk [Member] Issuer Risk [Member] Government Bond Risk [Member] Interest Rate Risk [Member] Credit Risk [Member] Extension Risk [Member] Prepayment Risk [Member] Small- and Mid-Capitalization Risk [Member] Large-Capitalization Company Risk [Member] Liquidity Risk [Member] Foreign Sovereign Debt Risk [Member] Foreign Securities Risk [Member] Tax Risk [Member] Market Disruption and Geopolitical Risk [Member] Management and Operational Risk [Member] Short Selling Risk [Member] Preferred Stock Risk [Member] Depositary Receipts Risk [Member] Geographic Focus Risk [Member] Gulf Region [Member] United States [Member] ETF Risks [Member] Costs of Buying or Selling Shares Risk [Member] Limited Authorized Participants, Market Makers and Liquidity Providers Risk [Member] Trading Risk [Member] Subsidiary Investment Risk [Member] Private Fund Risk [Member] Valuation of Private Funds [Member] Atlas America Fund [Member] S&P 500 Total Return Index (reflects no deduction for fees, expenses or taxes) Bloomberg U.S. Treasury 7-10 Year Total Return Index (reflects no deduction for fees, expenses or taxes) Atlas America Fund. Atlas America Fund. Valuation of Private Funds. Private Fund Risk. Subsidiary Investment Risk. Trading Risk. Limited Authorized Participants, Market Makers and Liquidity Providers Risk. Costs of Buying or Selling Shares Risk. ETF Risks. Geographic Focus Risk. Depositary Receipts Risk. Preferred Stock Risk. Short Selling Risk. Management and Operational Risk. Market Disruption and Geopolitical Risk. Tax Risk. Foreign Securities Risk. Foreign Sovereign Debt Risk. Liquidity Risk. Large-Capitalization Company Risk. Small- and Mid-Capitalization Risk. Extension Risk. Government Bond Risk. Issuer Risk. Counterparty Risk. U.S. Government Securities Risk. Treasury Inflation Protected Securities Risk ("TIPS"). Agricultural Commodities Risk. Investment Company and Exchange-Traded Fund Risk. Valuation Risk. Commodity-Linked Derivatives Tax Risk. Commodity-Linked Derivatives Risk. Structured Securities Risk. Swap Agreement Risk. Options Risk. Futures Contracts Risk. Forward Contracts Risk. Derivatives Risk. New/Smaller Fund Risk. Models and Data Risk. Corporate Debt Securities Risk. Municipal Securities Risk. Gold Risk. REIT Risk. Real Estate Risk. Market Risk – Equities United States. Gulf Region. Prepayment Risk. Credit Risk. Interest Rate Risk. Bloomberg U.S. Treasury 7-10 Year Total Return Index (reflects no deduction for fees, expenses or taxes) S&P 500 Total Return Index (reflects no deduction for fees, expenses or taxes)