EXHIBIT 1 JOINT FILING AGREEMENT The undersigned hereby agree to the joint filing of the Schedule 13G to which this Agreement is attached. Dated: February 14, 2003 WAM Acquisition GP, Inc. for itself and as general partner of LIBERTY WANGER ASSET...

                                                                       EXHIBIT 1

                             JOINT FILING AGREEMENT

         The undersigned hereby agree to the joint filing of the Schedule 13G to
which this Agreement is attached.

              Dated: February 14, 2003

                           WAM Acquisition GP, Inc.
                               for itself and as general partner of
                               LIBERTY XXXXXX ASSET MANAGEMENT, L.P.

                           By: /s/ Xxxxx X. Xxxxx
                              -------------------------------------------------
                                   Xxxxx X. Xxxxx
                                   Senior Vice President and Secretary

                           LIBERTY ACORN TRUST

                           By: /s/ Xxxxx X. Xxxxx
                              -------------------------------------------------
                                   Xxxxx X. Xxxxx
                                   Vice President, Treasurer and
                                   Secretary


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