Exhibit 99.1

                           Explanation of Responses:

(1) Third Point LLC ("Third Point") is investment manager or adviser to Third
    Point Offshore Fund, Ltd. ("Offshore Fund") and a variety of hedge funds and
    managed accounts (including but not limited to the Offshore Fund, the
    "Funds"). The Funds own 1,109,800 shares of common stock of the Issuer (the
    "Shares"), including 786,200 shares of common stock of the issuer
    beneficially owned by the Offshore Fund. Third Point may be deemed to have
    beneficial ownership over the Shares by virtue of the authority granted to
    Third Point by the Funds to vote and to dispose of the Shares. Mr. Daniel S.
    Loeb ("Mr. Loeb") serves as the Chief Executive Officer of Third Point and
    by virtue of such position may be deemed to have beneficial ownership over
    the Shares. Mr. Loeb also serves as a director of the Offshore Fund. Third
    Point and Mr. Loeb hereby disclaim any beneficial ownership of the
    securities reported herein for purposes of Section 16 of the Securities
    Exchange Act of 1934, as amended (the "Act") except to the extent of their
    pecuniary interest therein as determined in accordance with the Act and the
    rules adopted thereunder.