The Disciplined Growth Investors Fund The Disciplined Growth Investors Fund [Member] Managed Portfolio Risk [Member] Equity Securities Risk [Member] Mid-Capitalization Risk [Member] Growth Stock Risk [Member] Industry Risk [Member] Non-U.S. Securities Risk [Member] Currency Risk [Member] Fixed-Income Securities Risk [Member] Allocation Risk [Member] Technology Sector Risk [Member] Cash Position Risk [Member] Corporate Debt Risk [Member] High Yield Securities Risk [Member] Mortgage-Backed and Asset-Backed Securities Risk [Member] S&P 500 Total Return Index® The Disciplined Growth Investors Fund. The Disciplined Growth Investors Fund. S&P 500 Total Return Index® Mortgage-Backed and Asset-Backed Securities Risk. High Yield Securities Risk. Corporate Debt Risk. Cash Position Risk. Technology Sector Risk. Allocation Risk. Fixed-Income Securities Risk. Currency Risk. Non-U.S. Securities Risk. Industry Risk. Growth Stock Risk. Mid-Capitalization Risk. Equity Securities Risk. Managed Portfolio Risk.