Overprotective parents

I have three beautiful daughters. Sometimes I wonder do I give them to much. I'm often that I'm am a overprotective mother. So what I get up through the night to check on them. They can't be wrong. It's important to know who your kids friends are. I think its also important to know their friends parents especially if they gone be around your kids. When my oldest go out with her friends she has to check in every hour. She has turn 15 but I still like to know she is ok. Some people say I'm overprotective I call it parenting.
My children are my life everything I do is for my children.
What do you think