EX-99 2 exhibit-a.txt EXHIBIT A EXHIBIT A JOINT FILING AGREEMENT PURSUANT TO RULE 13d-1(k) The undersigned acknowledge and agree that the foregoing statement on Schedule 13D is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13D may be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements. The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate. DATED: December 11, 2006 S.A.C. CAPITAL ADVISORS, LLC By: /s/ Peter Nussbaum --------------------------- Name: Peter Nussbaum Title: Authorized Person S.A.C. CAPITAL MANAGEMENT, LLC By: /s/ Peter Nussbaum --------------------------- Name: Peter Nussbaum Title: Authorized Person S.A.C. CAPITAL ASSOCIATES, LLC By: /s/ Peter Nussbaum --------------------------- Name: Peter Nussbaum Title: Authorized Person S.A.C. MULTIQUANT FUND, LLC By: /s/ Peter Nussbaum --------------------------- Name: Peter Nussbaum Title: Authorized Person S.A.C. MERIDIAN FUND, LLC By: /s/ Peter Nussbaum --------------------------- Name: Peter Nussbaum Title: Authorized Person S.A.C. SELECT FUND, LLC By: /s/ Peter Nussbaum --------------------------- Name: Peter Nussbaum Title: Authorized Person CR INTRINSIC INVESTORS, LLC By: /s/ Peter Nussbaum --------------------------- Name: Peter Nussbaum Title: Authorized Person CR INTRINSIC INVESTMENTS, LLC By: /s/ Peter Nussbaum --------------------------- Name: Peter Nussbaum Title: Authorized Person STEVEN A. COHEN By: /s/ Peter Nussbaum --------------------------- Name: Peter Nussbaum Title: Authorized Person