Who's in Idaho?

Last night, my credit card company called to see if I had been in Idaho recently. Someone used my credit card at a supermarket there. I told the man with the fraud department that I had never been to Idaho and don't know anyone there. My credit card was inactivated immediately so it can't be used anymore. We don't know how my credit card number was stolen, but I got lucky the credit card company noticed the problem right away.