Revenue Disclosures - Disaggregation of Franchise Revenue by Major Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Franchise revenues
Disaggregation of Revenue [Line Items]
Total franchise revenue	$ 121,752	$ 156,200	$ 334,665	$ 487,794
Royalties
Disaggregation of Revenue [Line Items]
Total franchise revenue	56,061	72,506	154,672	226,888
Advertising fees
Disaggregation of Revenue [Line Items]
Total franchise revenue	51,932	67,514	142,750	211,882
Pancake and waffle dry mix sales and other
Disaggregation of Revenue [Line Items]
Total franchise revenue	10,690	13,201	27,575	40,158
Franchise and development fees
Disaggregation of Revenue [Line Items]
Total franchise revenue	$ 3,069	$ 2,979	$ 9,668	$ 8,866