Closure and Other Impairment Charges (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2017 USD ($) Restaurant	Dec. 31, 2016 USD ($) Restaurant	Dec. 31, 2015 USD ($) Restaurant
Restructuring Cost and Reserve [Line Items]
Closure charges	$ 3,900	$ 1,200	$ 1,400
Business exit costs	0	2,900	0
Long-lived tangible asset impairment	100	1,000	1,200
Total closure and impairment charges	3,968	5,092	2,576
Facility Costs
Restructuring Cost and Reserve [Line Items]
Business exit costs		2,900
Contract Termination
Restructuring Cost and Reserve [Line Items]
Business exit costs		2,500
Future Lease Payments, Net
Restructuring Cost and Reserve [Line Items]
Business exit costs		$ 400
Applebee's
Restructuring Cost and Reserve [Line Items]
Number of restaurants with impairments charges | Restaurant		4
IHOP
Restructuring Cost and Reserve [Line Items]
Closure charges	2,200	$ 700	$ 1,400
Long-lived tangible asset impairment	$ 600	$ 1,100
Restaurants taken back and closed | Restaurant			2
Number of restaurants with impairments charges | Restaurant	8	8
Individually Insignificant Restaurants
Restructuring Cost and Reserve [Line Items]
Long-lived tangible asset impairment	$ 400
Corporate
Restructuring Cost and Reserve [Line Items]
Total closure and impairment charges	$ 0	$ 2,900	$ 0