Hefe's, and wheat yeast strains in general are very vigorous fermenters. Often fermentation is done within 5-7 days or so. But as Nuggethead said, never put your yeast on a schedule. It's done when it's done. And at that temp, It's going to take a touch longer.
All that said, when fermentation is done, there's no reason to delay getting it into bottles. I personally find Hefe's start stretching their legs about 3 weeks after fermentation has stopped, and keep their full character for about 2 months, but are still tasty up to 4 months. I would advise to drink it as fresh as possible, but don't rush it. An extra week either in primary or the bottle will only serve to meld the flavors better.
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