OpenIdConnectNotification when user already have a cookie

I am using an OpenId Connect provider (Thinktecture Identity Server) with OWIN/Katana in ASP.Net MVC application. I need to log some information to the database when a user login to the application. I am doing this in SecurityTokenValidated of OpenIdConnectAuthenticationNotifications. But this event does not fire if the user already have the cookie. What is the best way to do this?