I can't put my finger on it, but something in this book seems familiar. It kind of reminds me off The Heart is a Lonely Hunter. I know it is not related at all but there is something about the book that conjures up the comparison in my head.
The difference is that I somehow can't find a way into Idaho. I just somehow can't get invested in the story or the characters. Maybe it is something to do with the constantly shifting POVs or with the characters not really connecting with each other that makes it feel like they keep this reader at bay also.