I've grown these for two years and have divided them. If theyre dormant I would dry it for about a week to avoid risk of disease. If they have leaves and are growing you can go ahead and plant them.

I agree with vikingboy.
Re: removing the offsets. More corms = more plants, especially if you're potting them up now. I've had a few Picasso which had a nice ring of offsets around the top of the corms, I wish I new how the growers do that, which when planted made nice large clumps with a lot of flowers.