How get parrent div

How get parrent div

Good day.
<div class="form-group has-success">
<label class="control-label" for="inputSuccess">Input with success</label>
<input type="text" class="form-control" id="inputSuccess">
</div>
<div class="form-group has-warning">
<label class="control-label" for="inputWarning">Input with warning</label>
<input type="text" class="form-control" id="inputWarning">
</div>
<div class="form-group has-error">
<label class="control-label" for="inputError">Input with error</label>
<input type="text" class="form-control" id="inputError">
</div>
I would like that when input lose focus(focusout) in class element div
with class "form-group" add class "add", but only one.
For ex. if input with id="inputError" lose focus in class element <div
class="form-group has-error"> add class "add" <div class="form-group
has-error add">
And i would like that only in one element with class form-group add class
"add".
I use code:
$(".form-control").focusout(function(){
})
but i dont know how get parrent div with class form-group...
How make this?