What are your ambient (room) temperatures? How do you have the airflow set up in the case?
To me it seems about normal - OCed chips put out more ambient heat when idle, so a slight increase in the idle temps is expected.
Idle temps also don't tell you much because your cooling is not as effective at lower temps. What will give you a better indicator of your cooling are your idle temps. You should run an Intel Burn test or the like to figure out what you hit as your 100% load temp.