Of course they try to keep it as quiet as possible. It's only announced if they are legally required to or a reporter gets wind of it. Get you head out of the sand.
http://www.chicagotribune.com/business/ct-allstate-layoffs-0811-biz-20170810-story.html
http://www.chicagotribune.com/business/ct-allstate-it-layoffs-0702-biz-20150702-story.html
http://www.wdbj7.com/content/news/Roanoke-Valley-Allstate-jobs--381039881.html
https://www.illinoispolicy.org/allstate-other-illinois-companies-set-to-lay-off-more-than-1300-employees/
These are just a few articles. I was laid off with over 200 people across the country last year and the news only made Roanoke.
Posted by @OMISYQz-2ltm. Came here to make a similar post, but the OP beat me to it. So yes, Allstate has been laying off people for years.