“Getting your window broken is no fun! While the teenagers should own up and offer (or have their parents offer) to pay for the damage, they aren’t technically liable for the damage. If they don’t offer or you don’t get their information, you’ll have to pay for the damage unless you pursue legal action.
Typically, comprehensive will cover broken glass. That said, you will have to pay your comprehensive deductible. If you have a $500 deductible, for example. but only $400 worth of damage, you’ll end up having to pay for the repairs yourself.