More than acceptable, nothing to worry about at all, seems you have a good chip.
My CPU temperature is about 55-60 degrees (C) when idle and goes up on CPU load. Laptop turned off after 10 minutes skype video call (using 30-40% of CPU). Also, running the long running data sync process with almost the same CPU load lead to 88 degrees in 3-5 minutes, after which it shutted down.
My laptop is 2 years old. Is it a time to disasemble and clean it?