Well, if this service truly is a backup program (and not malware masquerading), I suppose that it could be running all the time. I don't know, I don't use any programs like that...preferring to back up periodically, rather than continuously.
This is not a Windows process, from what I read.
When using Task Manager, it is normal for System Idle Process to reflect high percentages. This merely means that the CPU is not working hard while running other programs. High percentages are good, not bad.http://en.wikipedia.org/wiki/System_idle_process