Name That Pattern: side ‘panel’

Please can someone name this pattern - where you edit something in a table and, instead of allowing you to edit the content in a modal dialog, you edit it in a docked side 'panel'? As per the screenshot below.

I quite like this and think I prefer it to a modal dialog pattern, as it feels like the user is less removed from the context of the page as the window is to the side, rather than in the centre and covering much of the content.

I would love some opinions on the usability of this pattern.