I'd love to use IntelliJ, but no matter what obscure hacks I try, I simply cannot get it to render fonts properly under Ubuntu 14.10. This makes me sad, because it seems awesome for Scala.
I have very good news for you.
1. Download this patched jdk from https://code.google.com/p/tuxjdk/
2. Extract it somewhere
3. Make it your JAVA_HOME before launching IntelliJ.
4. Profit!