Interesting Idaho factoid, in the new millennium, Idaho has only one win against a major conference team, and that happened in 2000 vs Washington State. Despite playing 1-3 games per year against Power 5 teams (and you could even include Western region powers BYU and Boise State- neither of whom they've beaten since 2000), they have only one win. They really have no credibility when thinking they are a legit FBS program. There are a lot of FCS program with far better records against top programs than them.
Incidentally, in that 18 season span, they only had a couple of games that were inside of a 10 point spread. Most were total blowouts, including several 50+ point blowouts. WSU blasted them tin their last bowl season, 56-6 two weeks after Eastern went into Pullman and beat them.