Exhibit 99.1

                            Explanation of Responses

(2) Reference is hereby made to the offer by L Curve Sub Inc. and M Curve Sub
Inc., each a direct subsidiary of Wengen Alberta, Limited Partnership, to
purchase all of the issued and outstanding shares of Common Stock, par value
$.01 per share, of the Issuer at a purchase price of $62.00 net per share in
cash without interest and less any amounts required to be deducted and withheld
under any applicable law, upon the terms and subject to the conditions set forth
in the offer to purchase dated June 8, 2007, and the related letter of
transmittal, as they may be supplemented or amended from time to time. On July
9, 2007, Wengen Alberta, Limited Partnership issued a press release announcing
the completion of the initial offering period. As described in the Schedule 13D,
as amended (the "13D/A"), filed with the Securities and Exchange Commission on
March 26, 2007, by Douglas L. Becker, R. Christopher Hoehn-Saric, Steven M.
Taslitz, Eric D. Becker, Citigroup Capital Partners II 2007 Citigroup
Investment, L.P., CGI CPE LLC, CGI Private Equity LP, LLC, Citicorp Banking
Corporation, Citigroup Capital Partners II Employee Master Fund, L.P., Citigroup
Capital Partners II Onshore, L.P., Citigroup Capital Partners II Cayman
Holdings, L.P., Citigroup Private Equity LP, Citigroup Alternative Investments
LLC, Citigroup Investments Inc., Citigroup Inc., Sigma Capital Management, LLC
("Sigma Management") and Steven A. Cohen (collectively, the "13D Persons", with
Sigma Management and Steven A. Cohen referred to herein as the "SAC Reporting
Persons"), the 13D Persons may be deemed to be members of a group within the
meaning of Rule 13d-5(b) promulgated under the Securities Exchange Act of 1934,
as amended, with regard to their respective interests in equity securities of
the Issuer. The amount of the Issuer's securities held by Sigma Capital
Associates, LLC ("Sigma Associates") as reported herein does not include the
holdings of any other 13D Persons and each of Sigma Associates and the SAC
Reporting Persons disclaim any pecuniary interest in the Issuer's securities
held by the other 13D Persons.

(3) Sigma Associates holds 40,000 shares of Common Stock of the Issuer. Pursuant
to an investment management agreement, Sigma Management exercises investment and
voting power with respect to the 40,000 shares of Common Stock held by Sigma
Associates. Steven A. Cohen controls Sigma Management. Sigma Management is owned
by S.A.C. Capital Management, LLC, and Mr. Cohen directly and indirectly owns
all of the equity interests of S.A.C. Capital Management, LLC. In accordance
with Instruction 5(b)(iv), the entire amount of the Issuer's securities held by
Sigma Associates is reported herein. Each SAC Reporting Person disclaims any
beneficial ownership of any of the Issuer's securities to which this report
relates for purposes of Section 16 of the Securities Exchange Act of 1934, as
amended, except to the extent of its indirect pecuniary interest therein, and
this report shall not be deemed an admission that any SAC Reporting Person is
the beneficial owner of such securities for purposes of Section 16 or for any
other purposes. A portfolio manager of Sigma Management owns 2,400 shares of
Common Stock of the Issuer for his personal account and an additional 100 shares
of Common Stock of the Issuer are held in his IRA account. This portfolio
manager also has investment discretion over an account that holds an additional
300 shares of Common Stock of the Issuer. Each of the SAC Reporting Persons
disclaims beneficial ownership of these 2,800 shares, which shares are not
reflected in this filing.