I would like to have a table with the following features:

* fixed header,
* fixed height (with visible scrollbars)
* 3 fixed width column (one large column and two narrow column).

I started using: 

```
tbody { display:block; overflow:auto; height:100px; }

```

To get at least the fixed height but this rule squeezes the table on the left (I will provide a screenshot if necessary).

The table is contained in a Bootstrap 3 column.

Here is an example <http://jsfiddle.net/PGEdK/>

Any ideas? Thanks in advance.