Basis of Presentation and Summary of Significant Accounting Policies (Concentration Risk) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012 Restaurants Franchisee
Largest Franchisees | Accounts Receivable | Revenue from Rights Concentration Risk
Concentration Risk [Line Items]
Number of franchisees	15
Number of restaurants	1,556
Concentration risk by percentage	45.00%
Net accounts receivable	$ 48.8
Minimum | Largest Franchisees | Accounts Receivable | Revenue from Rights Concentration Risk
Concentration Risk [Line Items]
Number of restaurants per franchisee	59
Applebee's
Concentration Risk [Line Items]
Number of restaurants	2,034
Applebee's | Largest Franchisees | Accounts Receivable | Revenue from Rights Concentration Risk
Concentration Risk [Line Items]
Number of franchisees	12
IHOP
Concentration Risk [Line Items]
Number of restaurants	1,581
IHOP | Largest Franchisees | Accounts Receivable | Revenue from Rights Concentration Risk
Concentration Risk [Line Items]
Number of franchisees	3