JOINT FILING AGREEMENT The undersigned hereby agree to the joint filing of the Schedule 13G to which this Agreement is attached. Dated: February 12, 2003 WAM Acquisition GP, Inc. for itself and as general partner of LIBERTY WANGER ASSET MANAGEMENT, L.P.

                                                                       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 12, 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