If you don't locate what you're looking for trying Insweb, check out another web service like esurance.  Esurance not only gives a comparison of Idaho auto insurance rates, but it also gives a wealth of information about buying car insurance.  If you still aren't satisfied, the next step is to pick up the telephone and call major insurance companies.  Most states such as Idaho have representatives from the prominent insurance providers, like State Farm and Allstate.  You can also try national groups like Geico.