I won't name my insurance company, but I talked about this with my broker recently when I took an international trip.  If you're a pro, get pro insurance, and that's a policy that will cover theft, fire, water, dropping, etc.  You will need to find out how they define 'pro' (ie, is it the level of the equipment you have, or is it the percentage of your income from photography).  If you're not, then a home owner's/renter's policy is enough, but that may vary from policy to policy.  If you're not sure, check with your broker.

I'll also add: one friend of mine has pro event insurance, meaning that if her equipment fails during a wedding, the insurance will pay up to $50k to redo the wedding to get the shots.  If that's the kind of insurance you need, I can ask her for more details.  It's a bit much for me.