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Members' Equity Interests of Operating Company	6 Months Ended
Members' Equity Interests of Operating Company	Jun. 30, 2012
Members' Equity Interests of Operating Company [Abstract]
Members' Equity Interests of Operating Company	Note 10-Members' Equity Interests of Operating Company Except as otherwise provided by law, the liability of a member of the operating company is limited to the amount of its capital account. A member may transfer or assign all, or any part of, its membership interest only with the prior written consent of Pzena Investment Management, Inc., which may be withheld in its sole discretion. Any Transferee admitted as a member shall succeed to the capital account, or portion thereof, transferred or assigned, as if no such transfer or assignment had occurred.