Exhibit I

                                       to

                                  Schedule 13G

Ameriprise Financial, Inc., a Delaware Corporation, is a parent holding company.
The classification and identity of the relevant subsidiaries is as follows:

Investment Adviser - Columbia Management Investment Advisers, LLC (formerly
known as RiverSource Investments, LLC) is an investment adviser registered under
section 203 of the Investment Advisers Act of 1940.