Pioneer Valley Web Design on "Editing Footer in Twenty Twelve"

You have a custom named Theme (concordiabaptist).

That said, looks like a custom copy of twentytwelve (would have been best to have created a child theme of twentytwelve)

The footer is in file footer.php

You have used CSS to hide the site info (could have modified that)

But let's work with what we have

<footer id="colophon" role="contentinfo">

Insert immediately on next line after the line above:

<div class="copyright_foot">&copy; 2013 Concordia Baptist Church - All Rights Reserved</div>

You can then create some CSS if desired, for example (at very bottom of style.css):

.copyright_foot {
color: #000;
font-size: 10pt;
text-align: center;
margin: 0 auto;
padding: 0;
}

I would make a current backup prior to editing any site files.