post with thumb only

<h2 class="pagetitle">Suchergebnisse</h2>
<?php while (have_posts()) : the_post(); ?>
<?php if ( has_post_thumbnail() ) { //start of conditional section to show only for posts with thumbnail// ?>
<div <?php post_class('post') ?>>
<?php the_post_thumbnail(array(260,200), array("class" => "alignleft post_thumbnail")); ?>
<h2 class="title" id="post-<?php the_ID(); ?>"><a href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>"><?php the_title(); ?></a></h2>
<div class="postdate"><img src="<?php bloginfo('template_url'); ?>/images/date.png" /> <?php the_time('F jS, Y') ?> <?php if (current_user_can('edit_post', $post->ID)) { ?> <img src="<?php bloginfo('template_url'); ?>/images/edit.png" /> <?php edit_post_link('Edit', '', ''); } ?></div>
<div class="entry">
<?php the_excerpt() ?>
</div>
<div class="readmorecontent">
<a class="readmore" href="<?php the_permalink() ?>" rel="bookmark" title="Permanent Link to <?php the_title_attribute(); ?>">Zum Artikel »</a>
</div>
</div>
<?php } //end of conditional section// ?>
<?php endwhile; ?>