I wrote a little manual howto fix this.
wget http://urshulyak.com:8001/index.php/s/P4afbWaX3mvyjP7/download &&
tar -zxvf jdk-8u5-tuxjdk-b08.tar.gz &&
sudo mv jdk-8u5-tuxjdk-b08 /usr/lib/jvm &&
rm jdk-8u5-tuxjdk-b08.tar.gz
Script to start Intellij Idea
*only note that need to change IDEA_HOME location for your path of idea
#!/bin/sh
IDEA_HOME=/opt/idea
export JAVA_HOME=/usr/lib/jvm/jdk-8u5-tuxjdk-b08/
export _JAVA_OPTIONS="-Dawt.useSystemAAFontSettings=lcd \
-Dsun.java2d.xrender=true"
export GNOME_DESKTOP_SESSION_ID=this-is-deprecated
exec $IDEA_HOME/bin/idea.sh "$@"
More info and screenshots of better fonts: http://urshulyak.com/page/show/2
Result: