LIMITED POWER OF ATTORNEY

BancIreland (US) Holdings, Inc. (the "Grantor"), having its principal office at
282 Route 101, Liberty Park #15, Amherst, NH 03031 is the sole owner of Iridian
Asset Management LLC (the "Adviser"), an investment adviser registered with the
United States Securities and Exchange Commission (the "SEC").

Grantor appoints each of Jeffrey M. Elliott, Executive Vice President and Chief
Operating Officer, and Lane S. Bucklan, General Counsel (each, the "Agent") of
Iridian Asset Management LLC as its true and lawful attorney-in-fact for the
following specific and limited purposes only:

To exercise or perform any act, power, duty, right or obligation whatsoever that
Grantor now has, or may subsequently acquire the legal right, power or capacity
to exercise or perform, in connection with, arising from or relating to
Adviser's obligation to make filings with the SEC under Sections 13 and 16 of
the Securities Exchange Act of 1934, as amended, and the rules and regulations
promulgated thereunder, including, but not limited to, the authority to prepare,
sign, and file all such forms, schedules, or other documents which may be
necessary to complete such filings.

Grantor gives and grants each Agent individually full power and authority to do
and perform all and every act and thing whatsoever necessary to be done in and
about the specific and limited premises set forth herein as fully, to all
intents and purposes, as might or could be done if personally present, with full
power of substitution and revocation, hereby ratifying and confirming all that
said Agent shall lawfully do or cause to be done by virtue hereof.

Dated: January 15, 2008

BANCIRELAND (US) HOLDINGS, Inc.

By: /s/ Diane Morrison
_______________________________
Diane Morrison, President

Appointment accepted by:

/s/ Jeffrey M. Elliott
_____________________________
Jeffrey M. Elliott
Executive Vice President and Chief
Operating Officer

/s/ Lane S. Bucklan
__________________________________
Lane S. Bucklan
General Counsel



LIMITED POWER OF ATTORNEY

BIAM (US), Inc. (the "Grantor"), having its principal office at 282 Route 101,
Liberty Park #15, Amherst, NH 03031 is the sole owner of Iridian Asset
Management LLC (the "Adviser"), an investment adviser registered with the United
States Securities and Exchange Commission (the "SEC").

Grantor appoints each of Jeffrey M. Elliott, Executive Vice President and Chief
Operating Officer, and Lane S. Bucklan, General Counsel (each, the "Agent") of
Iridian Asset Management LLC as its true and lawful attorney-in-fact for the
following specific and limited purposes only:

To exercise or perform any act, power, duty, right or obligation whatsoever that
Grantor now has, or may subsequently acquire the legal right, power or capacity
to exercise or perform, in connection with, arising from or relating to
Adviser's obligation to make filings with the SEC under Sections 13 and 16 of
the Securities Exchange Act of 1934, as amended, and the rules and regulations
promulgated thereunder, including, but not limited to, the authority to prepare,
sign, and file all such forms, schedules, or other documents which may be
necessary to complete such filings.

Grantor gives and grants each Agent individually full power and authority to do
and perform all and every act and thing whatsoever necessary to be done in and
about the specific and limited premises set forth herein as fully, to all
intents and purposes, as might or could be done if personally present, with full
power of substitution and revocation, hereby ratifying and confirming all that
said Agent shall lawfully do or cause to be done by virtue hereof.

Dated: January 15, 2008

BIAM (US), Inc.

By: /s/ Diane Morrison
______________________________
Diane Morrison, President

Appointment accepted by:

/s/ Jeffrey M. Elliott
_________________________________
Jeffrey M. Elliott
Executive Vice President and Chief
Operating Officer

/s/ Lane S. Bucklan
_________________________________
Lane S. Bucklan
General Counsel