Goodwill - Gross and net carrying amounts of goodwill (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Goodwill [Line Items]
Gross	$ 709,100	$ 702,100
Accumulated Impairment Loss	(455,100)	(450,500)
Net	253,956	251,628	$ 251,600	$ 343,800
Franchised | Applebee's
Goodwill [Line Items]
Gross	686,700	686,700
Accumulated Impairment Loss	(450,500)	(450,500)
Net	236,200	236,200	236,200	328,400
Franchised | IHOP
Goodwill [Line Items]
Gross	10,800	10,800
Accumulated Impairment Loss	0	0
Net	10,800	10,800	10,800	10,800
Franchised | Fuzzy's
Goodwill [Line Items]
Gross	7,000	0
Accumulated Impairment Loss	0	0
Net	7,000	0	0	0
Entity Operated Units | Applebee's
Goodwill [Line Items]
Gross	4,600	4,600
Accumulated Impairment Loss	(4,600)	0
Net	$ 0	$ 4,600	$ 4,600	$ 4,600