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/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person
S.A.C. CAPITAL MANAGEMENT, LLC
By: /s/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person
S.A.C. CAPITAL ASSOCIATES, LLC
By: /s/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person
S.A.C. MULTIQUANT FUND, LLC
By: /s/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person
S.A.C. MERIDIAN FUND, LLC
By: /s/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person
S.A.C. SELECT FUND, LLC
By: /s/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person
CR INTRINSIC INVESTORS, LLC
By: /s/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person
CR INTRINSIC INVESTMENTS, LLC
By: /s/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person
XXXXXX X. XXXXX
By: /s/ Xxxxx Xxxxxxxx
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Name: Xxxxx Xxxxxxxx
Title: Authorized Person