It looks like you found her death info on the Last Residence field on the Social Security record. This does NOT necessarily mean it was truly her last residence. The Social Security uses that field for other purposes.
However, since Idaho death certificates are sealed for 50 years and that's all we have to go on, it's the best place to start looking for her obituary. There is an Elmore Co. volunteer at Obituary Lookup Volunteers-Idaho, http://freepages.genealogy.rootsweb.ancestry.com/~obitl/voli...
Scroll down to Elmore and choose Laura. Successful Searching!