Heavy Idle

[Newlin]

The Alero has been exhibiting odd behavior recently, at first this would just occur every so often, where when I am in drive and at a stop the car idles and noticeably shakes including the steering wheel.

This has become more prominent and consistent as of late and worsens if I have the air conditioning on or am using the power windows. This almost leads me to believe it is an issue with the alternator but my knowledge on this is limited to Google results.

I have a video of this I can upload later if it might help. Insight or troubleshooting ideas would be appreciated.