How to push a footer to the bottom of page when content is short or missing?

Question

I have a page with an outer div that wraps a header, content and footer div. I want the footer div to hug the bottom of the browser, even when the content div is not tall e

Answer 1

I did what Jahmic up top did (won't let me comment yet) except I had to use VH instead of % since I couldn't just apply it to a container class.

#inner-body-wrapper
{
    min-height: 70vh;
    min-height: -webkit-calc(100vh - 186px);
    min-height: -moz-calc(100vh - 186px);
    min-height: calc(100vh - 186px);
}