| Advertising and Marketing Costs (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
| Oct. 06, 2013 | Sep. 30, 2012 | Oct. 06, 2013
 item | Sep. 30, 2012 | |
| Advertising and Marketing Costs | ||||
| Advertising and marketing costs | $ 8.4 | $ 6.9 | $ 27.2 | $ 24.9 | 
| Number of marketing and national media advertising funds to which the entity and franchisees must contribute a minimum percentage of revenue | 2 | |||
| X | ||||||||||
| 
- Definition The number of marketing and advertising funds the entity and franchisees are required to contribute a certain percentage of revenue under the franchise agreements. No definition available. 
 | 
| X | ||||||||||
| 
- Definition The total expense recognized in the period for promotion, public relations, and brand or product advertising. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
 | 
| X | ||||||||||
| 
- Details 
 |