Git and .idea directories

I'm relatively new to both git and PyCharm. I've inferred the obvious, that the .idea directory is where all-things-PyCharm specific go in the .idea directory. I'm curious whether people add any/all/none of that directory to their git repositories. At some level, if a coworker replicates my project with a clone/pull, I might want him to pickup some of the same settings. But probably not all. I'm curious what is normally done here.

TIA!