Differentiate attachment pages in search results

Found out how to do it, I added the following in content.php. I added the second elseif statement and simple put the word Document in there before it displays the title of the page.

    if ( is_single() ) {
        the_title( '<h1 class="entry-title">', '</h1>' );
    }
    elseif (get_post_type() == 'attachment' ) {
        the_title( '<h1 class="entry-title">Document: <a href="' . esc_url( get_permalink() ) . '" rel="bookmark">', '</a></h1>' );
    }
    else {
        the_title( '<h1 class="entry-title"><a href="' . esc_url( get_permalink() ) . '" rel="bookmark">', '</a></h1>' );
    }