Way to margin-left the whole FCK-Textarea

The css file for the fck text area is set in the fckconfig.js file. To alter the left margin of the editor itself, I put the editor in a div, which I then alter the margin of. Doing both of these, I end up with a text area of the exact width (and other styles) of the content div it is going to go in, while the editor borders themselves are set to nicely clear the text area to the left and right.

I put the editor in a div with class FCKEditor and use this css to make the editor wider than the boundaries of the containing div:

#mainContent div.FCKEditor {
margin: 0 -14px 0 -6px; /* the editor border needs space for its border, padding and scroll bars (on right) */
}