POWER OF ATTORNEY
        KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby makes,
constitutes and appoints Lisa M. Withers, signing singly, as the undersigned's
true and lawful attorney-in-fact, with full power and authority as hereinafter
described on behalf of and in the name, place and stead of the undersigned to:
(1) prepare, execute, acknowledge, deliver and file all documents, certificates,
instruments, statements, filings and agreements (including any amendments to the
foregoing) (collectively, "Documents"), including without limitation Forms 3, 4,
5 and 13F and Schedules 13D and 13G, to be filed with or delivered to any
foreign or domestic governmental or regulatory body (including without
limitation the U.S. Securities and Exchange Commission, the U.S. Commodities
Futures Trading Commission and the National Futures Association) or any national
securities exchanges, or required or requested by any other person or entity
pursuant to any legal or regulatory requirement relating to the acquisition,
ownership or management of securities, futures contracts, or other investments,
and any other Documents relating or ancillary thereto, including without
limitation all Documents as considered necessary or advisable under the U.S.
Commodities Exchange Act and the Securities Act of 1933 and the rules and
regulations promulgated thereunder, as amended from time to time, or Sections 13
or 16 of the U.S. Securities Exchange Act of 1934 and the rules and regulations
promulgated thereunder, as amended from time to time (the "Exchange Act");
(2) seek or obtain, as the undersigned's representative and on the undersigned's
behalf, information on transactions in securities from any third party,
including brokers, employee benefit plan administrators and trustees, and the
undersigned hereby authorizes any such person to release any such information to
the undersigned and approves and ratifies any such release of information; and
(3) perform any and all other acts which in the discretion of such
attorneys-in-fact are necessary or desirable for and on behalf of the
undersigned in connection with the foregoing.
The undersigned acknowledges that:
(1) this Power of Attorney authorizes, but does not require, the
attorney-in-fact to act in her discretion on information provided to the
attorney-in-fact without independent verification of such information;
(2) any documents prepared and/or executed by the attorney-in-fact on behalf of
the undersigned pursuant to this Power of Attorney will be in such form and will
contain such information and disclosure as the attorney-in-fact, in her
discretion, deems necessary or desirable;
(3) the attorney-in-fact does not assume (i) any liability for the undersigned's
responsibility to comply with the requirement of the Exchange Act, (ii) any
liability of the undersigned for any failure to comply with such requirements,
or (iii) any obligation or liability of the undersigned for profit disgorgement
under Section 16(b) of the Exchange Act; and
(4) this Power of Attorney does not relieve the undersigned from responsibility
for compliance with the undersigned's obligations under the Exchange Act,
including without limitation the reporting requirements under Section 16 of the
Exchange Act.
        The undersigned hereby gives and grants the foregoing attorney-in-fact
full power and authority to do and perform all and every act and thing
whatsoever requisite, necessary or appropriate to be done in and about the
foregoing matters as fully to all intents and purposes as the undersigned might
or could do if present, with full power of substitution and revocation, hereby
ratifying all that the attorney-in-fact, or the attorney-in-fact's substitute or
substitutes, of, for and on behalf of the undersigned, shall lawfully do or
cause to be done by virtue of this Power of Attorney.
        This Power of Attorney shall remain in full force and effect until
revoked by the undersigned in a signed writing delivered to the above named
attorney-in-fact.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 23rd day of September 2008.
	TC Co-Investors V, L.L.C.
	By:  Thayer | Hidden Creek Management, L.P.
	Its:   Sole Manager
By:  Thayer | Hidden Creek Partners, L.L.C.
Its:   General Partner

	By: /s/ Daniel M. Dickinson
	       Name: Daniel M. Dickinson
	       Title: Executive

POWER OF ATTORNEY
       KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby makes,
constitutes and appoints Lisa M. Withers, signing singly, as the undersigned's
true and lawful attorney-in-fact, with full power and authority as hereinafter
described on behalf of and in the name, place and stead of the undersigned to:
(1) prepare, execute, acknowledge, deliver and file all documents, certificates,
instruments, statements, filings and agreements (including any amendments to the
foregoing) (collectively, "Documents"), including without limitation Forms 3, 4,
5 and 13F and Schedules 13D and 13G, to be filed with or delivered to any
foreign or domestic governmental or regulatory body (including without
limitation the U.S. Securities and Exchange Commission, the U.S. Commodities
Futures Trading Commission and the National Futures Association) or any national
securities exchanges, or required or requested by any other person or entity
pursuant to any legal or regulatory requirement relating to the acquisition,
ownership or management of securities, futures contracts, or other investments,
and any other Documents relating or ancillary thereto, including without
limitation all Documents as considered necessary or advisable under the U.S.
Commodities Exchange Act and the Securities Act of 1933 and the rules and
regulations promulgated thereunder, as amended from time to time, or Sections 13
or 16 of the U.S. Securities Exchange Act of 1934 and the rules and regulations
promulgated thereunder, as amended from time to time (the "Exchange Act");
(2) seek or obtain, as the undersigned's representative and on the undersigned's
behalf, information on transactions in securities from any third party,
including brokers, employee benefit plan administrators and trustees, and the
undersigned hereby authorizes any such person to release any such information to
the undersigned and approves and ratifies any such release of information; and
(3) perform any and all other acts which in the discretion of such
attorneys-in-fact are necessary or desirable for and on behalf of the
undersigned in connection with the foregoing.
The undersigned acknowledges that:
(1) this Power of Attorney authorizes, but does not require, the
attorney-in-fact to act in her discretion on information provided to the
attorney-in-fact without independent verification of such information;
(2) any documents prepared and/or executed by the attorney-in-fact on behalf of
the undersigned pursuant to this Power of Attorney will be in such form and will
contain such information and disclosure as the attorney-in-fact, in her
discretion, deems necessary or desirable;
(3) the attorney-in-fact does not assume (i) any liability for the undersigned's
responsibility to comply with the requirement of the Exchange Act, (ii) any
liability of the undersigned for any failure to comply with such requirements,
or (iii) any obligation or liability of the undersigned for profit disgorgement
under Section 16(b) of the Exchange Act; and
(4) this Power of Attorney does not relieve the undersigned from responsibility
for compliance with the undersigned's obligations under the Exchange Act,
including without limitation the reporting requirements under Section 16 of the
Exchange Act.
        The undersigned hereby gives and grants the foregoing attorney-in-fact
full power and authority to do and perform all and every act and thing
whatsoever requisite, necessary or appropriate to be done in and about the
foregoing matters as fully to all intents and purposes as the undersigned might
or could do if present, with full power of substitution and revocation, hereby
ratifying all that the attorney-in-fact, or the attorney-in-fact's substitute or
substitutes, of, for and on behalf of the undersigned, shall lawfully do or
cause to be done by virtue of this Power of Attorney.
        This Power of Attorney shall remain in full force and effect until
revoked by the undersigned in a signed writing delivered to the above named
attorney-in-fact.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 23rd day of September 2008.

	TC Equity Partners V, L.L.C.
By:  Thayer | Hidden Creek Partners, L.L.C.
Its:   Managing Member

	By: /s/ Daniel M. Dickinson
	       Name: Daniel M. Dickinson
	       Title: Executive


POWER OF ATTORNEY

       KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby makes,
constitutes and appoints Lisa M. Withers, signing singly, as the undersigned's
true and lawful attorney-in-fact, with full power and authority as hereinafter
described on behalf of and in the name, place and stead of the undersigned to:
(1) prepare, execute, acknowledge, deliver and file all documents, certificates,
instruments, statements, filings and agreements (including any amendments to the
foregoing) (collectively, "Documents"), including without limitation Forms 3, 4,
5 and 13F and Schedules 13D and 13G, to be filed with or delivered to any
foreign or domestic governmental or regulatory body (including without
limitation the U.S. Securities and Exchange Commission, the U.S. Commodities
Futures Trading Commission and the National Futures Association) or any national
securities exchanges, or required or requested by any other person or entity
pursuant to any legal or regulatory requirement relating to the acquisition,
ownership or management of securities, futures contracts, or other investments,
and any other Documents relating or ancillary thereto, including without
limitation all Documents as considered necessary or advisable under the U.S.
Commodities Exchange Act and the Securities Act of 1933 and the rules and
regulations promulgated thereunder, as amended from time to time, or Sections 13
or 16 of the U.S. Securities Exchange Act of 1934 and the rules and regulations
promulgated thereunder, as amended from time to time (the "Exchange Act");
(2) seek or obtain, as the undersigned's representative and on the undersigned's
behalf, information on transactions in securities from any third party,
including brokers, employee benefit plan administrators and trustees, and the
undersigned hereby authorizes any such person to release any such information to
the undersigned and approves and ratifies any such release of information; and
(3) perform any and all other acts which in the discretion of such
attorneys-in-fact are necessary or desirable for and on behalf of the
undersigned in connection with the foregoing.
The undersigned acknowledges that:
(1) this Power of Attorney authorizes, but does not require, the
attorney-in-fact to act in her discretion on information provided to the
attorney-in-fact without independent verification of such information;
(2) any documents prepared and/or executed by the attorney-in-fact on behalf of
the undersigned pursuant to this Power of Attorney will be in such form and will
contain such information and disclosure as the attorney-in-fact, in her
discretion, deems necessary or desirable;
(3) the attorney-in-fact does not assume (i) any liability for the undersigned's
responsibility to comply with the requirement of the Exchange Act, (ii) any
liability of the undersigned for any failure to comply with such requirements,
or (iii) any obligation or liability of the undersigned for profit disgorgement
under Section 16(b) of the Exchange Act; and
(4) this Power of Attorney does not relieve the undersigned from responsibility
for compliance with the undersigned's obligations under the Exchange Act,
including without limitation the reporting requirements under Section 16 of the
Exchange Act.
        The undersigned hereby gives and grants the foregoing attorney-in-fact
full power and authority to do and perform all and every act and thing
whatsoever requisite, necessary or appropriate to be done in and about the
foregoing matters as fully to all intents and purposes as the undersigned might
or could do if present, with full power of substitution and revocation, hereby
ratifying all that the attorney-in-fact, or the attorney-in-fact's substitute or
substitutes, of, for and on behalf of the undersigned, shall lawfully do or
cause to be done by virtue of this Power of Attorney.
        This Power of Attorney shall remain in full force and effect until
revoked by the undersigned in a signed writing delivered to the above named
attorney-in-fact.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 23rd day of September 2008.
	TC Roadrunner-Dawes Holdings, L.L.C.
	By:  TC Co-Investors V, L.L.C.
	Its:   Managing Member
	By:  Thayer | Hidden Creek Management, L.P.
	Its:  Sole Manager
By:  Thayer | Hidden Creek Partners, L.L.C.
Its:   General Partner

	By: /s/ Daniel M. Dickinson
	       Name: Daniel M. Dickinson
	       Title: Executive


POWER OF ATTORNEY
        KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby makes,
constitutes and appoints Lisa M. Withers, signing singly, as the undersigned's
true and lawful attorney-in-fact, with full power and authority as hereinafter
described on behalf of and in the name, place and stead of the undersigned to:
(1) prepare, execute, acknowledge, deliver and file all documents, certificates,
instruments, statements, filings and agreements (including any amendments to the
foregoing) (collectively, "Documents"), including without limitation Forms 3, 4,
5 and 13F and Schedules 13D and 13G, to be filed with or delivered to any
foreign or domestic governmental or regulatory body (including without
limitation the U.S. Securities and Exchange Commission, the U.S. Commodities
Futures Trading Commission and the National Futures Association) or any national
securities exchanges, or required or requested by any other person or entity
pursuant to any legal or regulatory requirement relating to the acquisition,
ownership or management of securities, futures contracts, or other investments,
and any other Documents relating or ancillary thereto, including without
limitation all Documents as considered necessary or advisable under the U.S.
Commodities Exchange Act and the Securities Act of 1933 and the rules and
regulations promulgated thereunder, as amended from time to time, or Sections 13
or 16 of the U.S. Securities Exchange Act of 1934 and the rules and regulations
promulgated thereunder, as amended from time to time (the "Exchange Act");
(2) seek or obtain, as the undersigned's representative and on the undersigned's
behalf, information on transactions in securities from any third party,
including brokers, employee benefit plan administrators and trustees, and the
undersigned hereby authorizes any such person to release any such information to
the undersigned and approves and ratifies any such release of information; and
(3) perform any and all other acts which in the discretion of such
attorneys-in-fact are necessary or desirable for and on behalf of the
undersigned in connection with the foregoing.
The undersigned acknowledges that:
(1) this Power of Attorney authorizes, but does not require, the
attorney-in-fact to act in her discretion on information provided to the
attorney-in-fact without independent verification of such information;
(2) any documents prepared and/or executed by the attorney-in-fact on behalf of
the undersigned pursuant to this Power of Attorney will be in such form and will
contain such information and disclosure as the attorney-in-fact, in her
discretion, deems necessary or desirable;
(3) the attorney-in-fact does not assume (i) any liability for the undersigned's
responsibility to comply with the requirement of the Exchange Act, (ii) any
liability of the undersigned for any failure to comply with such requirements,
or (iii) any obligation or liability of the undersigned for profit disgorgement
under Section 16(b) of the Exchange Act; and
(4) this Power of Attorney does not relieve the undersigned from responsibility
for compliance with the undersigned's obligations under the Exchange Act,
including without limitation the reporting requirements under Section 16 of the
Exchange Act.
        The undersigned hereby gives and grants the foregoing attorney-in-fact
full power and authority to do and perform all and every act and thing
whatsoever requisite, necessary or appropriate to be done in and about the
foregoing matters as fully to all intents and purposes as the undersigned might
or could do if present, with full power of substitution and revocation, hereby
ratifying all that the attorney-in-fact, or the attorney-in-fact's substitute or
substitutes, of, for and on behalf of the undersigned, shall lawfully do or
cause to be done by virtue of this Power of Attorney.
        This Power of Attorney shall remain in full force and effect until
revoked by the undersigned in a signed writing delivered to the above named
attorney-in-fact.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 23rd day of September 2008.
	TC Sargent Holdings, L.L.C.
	By:  TC Co-Investors V, L.L.C.
	Its:   Managing Member
	By:  Thayer | Hidden Creek Management, L.P.
	Its:  Sole Manager
By:  Thayer | Hidden Creek Partners, L.L.C.
Its:   General Partner

	By: /s/ Daniel M. Dickinson
	       Name: Daniel M. Dickinson
	       Title: Executive


OWER OF ATTORNEY
        KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby makes,
constitutes and appoints Lisa M. Withers, signing singly, as the undersigned's
true and lawful attorney-in-fact, with full power and authority as hereinafter
described on behalf of and in the name, place and stead of the undersigned to:
(1) prepare, execute, acknowledge, deliver and file all documents, certificates,
instruments, statements, filings and agreements (including any amendments to the
foregoing) (collectively, "Documents"), including without limitation Forms 3, 4,
5 and 13F and Schedules 13D and 13G, to be filed with or delivered to any
foreign or domestic governmental or regulatory body (including without
limitation the U.S. Securities and Exchange Commission, the U.S. Commodities
Futures Trading Commission and the National Futures Association) or any national
securities exchanges, or required or requested by any other person or entity
pursuant to any legal or regulatory requirement relating to the acquisition,
ownership or management of securities, futures contracts, or other investments,
and any other Documents relating or ancillary thereto, including without
limitation all Documents as considered necessary or advisable under the U.S.
Commodities Exchange Act and the Securities Act of 1933 and the rules and
regulations promulgated thereunder, as amended from time to time, or Sections 13
or 16 of the U.S. Securities Exchange Act of 1934 and the rules and regulations
promulgated thereunder, as amended from time to time (the "Exchange Act");
(2) seek or obtain, as the undersigned's representative and on the undersigned's
behalf, information on transactions in securities from any third party,
including brokers, employee benefit plan administrators and trustees, and the
undersigned hereby authorizes any such person to release any such information to
the undersigned and approves and ratifies any such release of information; and
(3) perform any and all other acts which in the discretion of such
attorneys-in-fact are necessary or desirable for and on behalf of the
undersigned in connection with the foregoing.
The undersigned acknowledges that:
(1) this Power of Attorney authorizes, but does not require, the
attorney-in-fact to act in her discretion on information provided to the
attorney-in-fact without independent verification of such information;
(2) any documents prepared and/or executed by the attorney-in-fact on behalf of
the undersigned pursuant to this Power of Attorney will be in such form and will
contain such information and disclosure as the attorney-in-fact, in her
discretion, deems necessary or desirable;
(3) the attorney-in-fact does not assume (i) any liability for the undersigned's
responsibility to comply with the requirement of the Exchange Act, (ii) any
liability of the undersigned for any failure to comply with such requirements,
or (iii) any obligation or liability of the undersigned for profit disgorgement
under Section 16(b) of the Exchange Act; and
(4) this Power of Attorney does not relieve the undersigned from responsibility
for compliance with the undersigned's obligations under the Exchange Act,
including without limitation the reporting requirements under Section 16 of the
Exchange Act.
        The undersigned hereby gives and grants the foregoing attorney-in-fact
full power and authority to do and perform all and every act and thing
whatsoever requisite, necessary or appropriate to be done in and about the
foregoing matters as fully to all intents and purposes as the undersigned might
or could do if present, with full power of substitution and revocation, hereby
ratifying all that the attorney-in-fact, or the attorney-in-fact's substitute or
substitutes, of, for and on behalf of the undersigned, shall lawfully do or
cause to be done by virtue of this Power of Attorney.
        This Power of Attorney shall remain in full force and effect until
revoked by the undersigned in a signed writing delivered to the above named
attorney-in-fact.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 23rd day of September 2008.
	Thayer | Hidden Creek Management, L.P.
By:  Thayer | Hidden Creek Partners, L.L.C.
Its:   General Partner

	By: /s/ Daniel M. Dickinson
	       Name: Daniel M. Dickinson
	       Title: Executive


POWER OF ATTORNEY
        KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby makes,
constitutes and appoints Lisa M. Withers, signing singly, as the undersigned's
true and lawful attorney-in-fact, with full power and authority as hereinafter
described on behalf of and in the name, place and stead of the undersigned to:
(1) prepare, execute, acknowledge, deliver and file all documents, certificates,
instruments, statements, filings and agreements (including any amendments to the
foregoing) (collectively, "Documents"), including without limitation Forms 3, 4,
5 and 13F and Schedules 13D and 13G, to be filed with or delivered to any
foreign or domestic governmental or regulatory body (including without
limitation the U.S. Securities and Exchange Commission, the U.S. Commodities
Futures Trading Commission and the National Futures Association) or any national
securities exchanges, or required or requested by any other person or entity
pursuant to any legal or regulatory requirement relating to the acquisition,
ownership or management of securities, futures contracts, or other investments,
and any other Documents relating or ancillary thereto, including without
limitation all Documents as considered necessary or advisable under the U.S.
Commodities Exchange Act and the Securities Act of 1933 and the rules and
regulations promulgated thereunder, as amended from time to time, or Sections 13
or 16 of the U.S. Securities Exchange Act of 1934 and the rules and regulations
promulgated thereunder, as amended from time to time (the "Exchange Act");
(2) seek or obtain, as the undersigned's representative and on the undersigned's
behalf, information on transactions in securities from any third party,
including brokers, employee benefit plan administrators and trustees, and the
undersigned hereby authorizes any such person to release any such information to
the undersigned and approves and ratifies any such release of information; and
(3) perform any and all other acts which in the discretion of such
attorneys-in-fact are necessary or desirable for and on behalf of the
undersigned in connection with the foregoing.
The undersigned acknowledges that:
(1) this Power of Attorney authorizes, but does not require, the
attorney-in-fact to act in her discretion on information provided to the
attorney-in-fact without independent verification of such information;
(2) any documents prepared and/or executed by the attorney-in-fact on behalf of
the undersigned pursuant to this Power of Attorney will be in such form and will
contain such information and disclosure as the attorney-in-fact, in her
discretion, deems necessary or desirable;
(3) the attorney-in-fact does not assume (i) any liability for the undersigned's
responsibility to comply with the requirement of the Exchange Act, (ii) any
liability of the undersigned for any failure to comply with such requirements,
or (iii) any obligation or liability of the undersigned for profit disgorgement
under Section 16(b) of the Exchange Act; and
(4) this Power of Attorney does not relieve the undersigned from responsibility
for compliance with the undersigned's obligations under the Exchange Act,
including without limitation the reporting requirements under Section 16 of the
Exchange Act.
        The undersigned hereby gives and grants the foregoing attorney-in-fact
full power and authority to do and perform all and every act and thing
whatsoever requisite, necessary or appropriate to be done in and about the
foregoing matters as fully to all intents and purposes as the undersigned might
or could do if present, with full power of substitution and revocation, hereby
ratifying all that the attorney-in-fact, or the attorney-in-fact's substitute or
substitutes, of, for and on behalf of the undersigned, shall lawfully do or
cause to be done by virtue of this Power of Attorney.
        This Power of Attorney shall remain in full force and effect until
revoked by the undersigned in a signed writing delivered to the above named
attorney-in-fact.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 23rd day of September 2008.
	Thayer | Hidden Creek Partners II, L.P.
	By:  THCP Management II, L.P.
	Its:   General Partner
By:  Thayer | Hidden Creek Partners, L.L.C.
Its:   General Partner

	By: /s/ Daniel M. Dickinson
	       Name: Daniel M. Dickinson
	       Title: Executive


POWER OF ATTORNEY
        KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby makes,
constitutes and appoints Lisa M. Withers, signing singly, as the undersigned's
true and lawful attorney-in-fact, with full power and authority as hereinafter
described on behalf of and in the name, place and stead of the undersigned to:
(1) prepare, execute, acknowledge, deliver and file all documents, certificates,
instruments, statements, filings and agreements (including any amendments to the
foregoing) (collectively, "Documents"), including without limitation Forms 3, 4,
5 and 13F and Schedules 13D and 13G, to be filed with or delivered to any
foreign or domestic governmental or regulatory body (including without
limitation the U.S. Securities and Exchange Commission, the U.S. Commodities
Futures Trading Commission and the National Futures Association) or any national
securities exchanges, or required or requested by any other person or entity
pursuant to any legal or regulatory requirement relating to the acquisition,
ownership or management of securities, futures contracts, or other investments,
and any other Documents relating or ancillary thereto, including without
limitation all Documents as considered necessary or advisable under the U.S.
Commodities Exchange Act and the Securities Act of 1933 and the rules and
regulations promulgated thereunder, as amended from time to time, or Sections 13
or 16 of the U.S. Securities Exchange Act of 1934 and the rules and regulations
promulgated thereunder, as amended from time to time (the "Exchange Act");
(2) seek or obtain, as the undersigned's representative and on the undersigned's
behalf, information on transactions in securities from any third party,
including brokers, employee benefit plan administrators and trustees, and the
undersigned hereby authorizes any such person to release any such information to
the undersigned and approves and ratifies any such release of information; and
(3) perform any and all other acts which in the discretion of such
attorneys-in-fact are necessary or desirable for and on behalf of the
undersigned in connection with the foregoing.
The undersigned acknowledges that:
(1) this Power of Attorney authorizes, but does not require, the
attorney-in-fact to act in her discretion on information provided to the
attorney-in-fact without independent verification of such information;
(2) any documents prepared and/or executed by the attorney-in-fact on behalf of
the undersigned pursuant to this Power of Attorney will be in such form and will
contain such information and disclosure as the attorney-in-fact, in her
discretion, deems necessary or desirable;
(3) the attorney-in-fact does not assume (i) any liability for the undersigned's
responsibility to comply with the requirement of the Exchange Act, (ii) any
liability of the undersigned for any failure to comply with such requirements,
or (iii) any obligation or liability of the undersigned for profit disgorgement
under Section 16(b) of the Exchange Act; and
(4) this Power of Attorney does not relieve the undersigned from responsibility
for compliance with the undersigned's obligations under the Exchange Act,
including without limitation the reporting requirements under Section 16 of the
Exchange Act.
        The undersigned hereby gives and grants the foregoing attorney-in-fact
full power and authority to do and perform all and every act and thing
whatsoever requisite, necessary or appropriate to be done in and about the
foregoing matters as fully to all intents and purposes as the undersigned might
or could do if present, with full power of substitution and revocation, hereby
ratifying all that the attorney-in-fact, or the attorney-in-fact's substitute or
substitutes, of, for and on behalf of the undersigned, shall lawfully do or
cause to be done by virtue of this Power of Attorney.
        This Power of Attorney shall remain in full force and effect until
revoked by the undersigned in a signed writing delivered to the above named
attorney-in-fact.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 23rd day of September 2008.

Thayer | Hidden Creek Partners, L.L.C.


	By: /s/ Daniel M. Dickinson
	       Name: Daniel M. Dickinson
	       Title: Executive


POWER OF ATTORNEY
        KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby makes,
constitutes and appoints Lisa M. Withers, signing singly, as the undersigned's
true and lawful attorney-in-fact, with full power and authority as hereinafter
described on behalf of and in the name, place and stead of the undersigned to:
(1) prepare, execute, acknowledge, deliver and file all documents, certificates,
instruments, statements, filings and agreements (including any amendments to the
foregoing) (collectively, "Documents"), including without limitation Forms 3, 4,
5 and 13F and Schedules 13D and 13G, to be filed with or delivered to any
foreign or domestic governmental or regulatory body (including without
limitation the U.S. Securities and Exchange Commission, the U.S. Commodities
Futures Trading Commission and the National Futures Association) or any national
securities exchanges, or required or requested by any other person or entity
pursuant to any legal or regulatory requirement relating to the acquisition,
ownership or management of securities, futures contracts, or other investments,
and any other Documents relating or ancillary thereto, including without
limitation all Documents as considered necessary or advisable under the U.S.
Commodities Exchange Act and the Securities Act of 1933 and the rules and
regulations promulgated thereunder, as amended from time to time, or Sections 13
or 16 of the U.S. Securities Exchange Act of 1934 and the rules and regulations
promulgated thereunder, as amended from time to time (the "Exchange Act");
(2) seek or obtain, as the undersigned's representative and on the undersigned's
behalf, information on transactions in securities from any third party,
including brokers, employee benefit plan administrators and trustees, and the
undersigned hereby authorizes any such person to release any such information to
the undersigned and approves and ratifies any such release of information; and
(3) perform any and all other acts which in the discretion of such
attorneys-in-fact are necessary or desirable for and on behalf of the
undersigned in connection with the foregoing.
The undersigned acknowledges that:
(1) this Power of Attorney authorizes, but does not require, the
attorney-in-fact to act in her discretion on information provided to the
attorney-in-fact without independent verification of such information;
(2) any documents prepared and/or executed by the attorney-in-fact on behalf of
the undersigned pursuant to this Power of Attorney will be in such form and will
contain such information and disclosure as the attorney-in-fact, in her
discretion, deems necessary or desirable;
(3) the attorney-in-fact does not assume (i) any liability for the undersigned's
responsibility to comply with the requirement of the Exchange Act, (ii) any
liability of the undersigned for any failure to comply with such requirements,
or (iii) any obligation or liability of the undersigned for profit disgorgement
under Section 16(b) of the Exchange Act; and
(4) this Power of Attorney does not relieve the undersigned from responsibility
for compliance with the undersigned's obligations under the Exchange Act,
including without limitation the reporting requirements under Section 16 of the
Exchange Act.
        The undersigned hereby gives and grants the foregoing attorney-in-fact
full power and authority to do and perform all and every act and thing
whatsoever requisite, necessary or appropriate to be done in and about the
foregoing matters as fully to all intents and purposes as the undersigned might
or could do if present, with full power of substitution and revocation, hereby
ratifying all that the attorney-in-fact, or the attorney-in-fact's substitute or
substitutes, of, for and on behalf of the undersigned, shall lawfully do or
cause to be done by virtue of this Power of Attorney.
        This Power of Attorney shall remain in full force and effect until
revoked by the undersigned in a signed writing delivered to the above named
attorney-in-fact.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 23rd day of September 2008.
	THC Co-Investors II, L.P.
	By:  THCP Management II, L.P.
	Its:   General Partner
By:  Thayer | Hidden Creek Partners, L.L.C.
Its:   General Partner

	By: /s/ Daniel M. Dickinson
	       Name: Daniel M. Dickinson
	       Title: Executive

POWER OF ATTORNEY
        KNOW ALL PERSONS BY THESE PRESENTS, that the undersigned hereby makes,
constitutes and appoints Lisa M. Withers, signing singly, as the undersigned's
true and lawful attorney-in-fact, with full power and authority as hereinafter
described on behalf of and in the name, place and stead of the undersigned to:
(1) prepare, execute, acknowledge, deliver and file all documents, certificates,
instruments, statements, filings and agreements (including any amendments to the
foregoing) (collectively, "Documents"), including without limitation Forms 3, 4,
5 and 13F and Schedules 13D and 13G, to be filed with or delivered to any
foreign or domestic governmental or regulatory body (including without
limitation the U.S. Securities and Exchange Commission, the U.S. Commodities
Futures Trading Commission and the National Futures Association) or any national
securities exchanges, or required or requested by any other person or entity
pursuant to any legal or regulatory requirement relating to the acquisition,
ownership or management of securities, futures contracts, or other investments,
and any other Documents relating or ancillary thereto, including without
limitation all Documents as considered necessary or advisable under the U.S.
Commodities Exchange Act and the Securities Act of 1933 and the rules and
regulations promulgated thereunder, as amended from time to time, or Sections 13
or 16 of the U.S. Securities Exchange Act of 1934 and the rules and regulations
promulgated thereunder, as amended from time to time (the "Exchange Act");
(2) seek or obtain, as the undersigned's representative and on the undersigned's
behalf, information on transactions in securities from any third party,
including brokers, employee benefit plan administrators and trustees, and the
undersigned hereby authorizes any such person to release any such information to
the undersigned and approves and ratifies any such release of information; and
(3) perform any and all other acts which in the discretion of such
attorneys-in-fact are necessary or desirable for and on behalf of the
undersigned in connection with the foregoing.
The undersigned acknowledges that:
(1) this Power of Attorney authorizes, but does not require, the
attorney-in-fact to act in her discretion on information provided to the
attorney-in-fact without independent verification of such information;
(2) any documents prepared and/or executed by the attorney-in-fact on behalf of
the undersigned pursuant to this Power of Attorney will be in such form and will
contain such information and disclosure as the attorney-in-fact, in her
discretion, deems necessary or desirable;
(3) the attorney-in-fact does not assume (i) any liability for the undersigned's
responsibility to comply with the requirement of the Exchange Act, (ii) any
liability of the undersigned for any failure to comply with such requirements,
or (iii) any obligation or liability of the undersigned for profit disgorgement
under Section 16(b) of the Exchange Act; and
(4) this Power of Attorney does not relieve the undersigned from responsibility
for compliance with the undersigned's obligations under the Exchange Act,
including without limitation the reporting requirements under Section 16 of the
Exchange Act.
        The undersigned hereby gives and grants the foregoing attorney-in-fact
full power and authority to do and perform all and every act and thing
whatsoever requisite, necessary or appropriate to be done in and about the
foregoing matters as fully to all intents and purposes as the undersigned might
or could do if present, with full power of substitution and revocation, hereby
ratifying all that the attorney-in-fact, or the attorney-in-fact's substitute or
substitutes, of, for and on behalf of the undersigned, shall lawfully do or
cause to be done by virtue of this Power of Attorney.
        This Power of Attorney shall remain in full force and effect until
revoked by the undersigned in a signed writing delivered to the above named
attorney-in-fact.

        IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney to
be executed as of this 23rd day of September 2008.

	THCP Management II, L.P.
By:  Thayer | Hidden Creek Partners, L.L.C.
Its:   General Partner

	By: /s/ Daniel M. Dickinson
	       Name: Daniel M. Dickinson
	       Title: Executive