Help My S3 keeps randomly restarting

[jrsharp21]

In the past month or so, my S3 has begun to re-start at random times. I can have it sitting on the counter or the console in my car and all of a sudden it will restart. Anyone have any ideas why it does this? I never had this problem before. It seems like it may have started happening after AT&T's last update. My phone is not rooted and I am using the stock launcher.