Revenue Disclosures - Disaggregation of Franchise Revenue by Major Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Franchise Revenue:
Disaggregation of Revenue [Line Items]
Total franchise revenue	$ 161,232	$ 140,976
Royalties
Disaggregation of Revenue [Line Items]
Total franchise revenue	75,242	65,767
Advertising fees
Disaggregation of Revenue [Line Items]
Total franchise revenue	70,883	60,885
Pancake and waffle dry mix sales and other
Disaggregation of Revenue [Line Items]
Total franchise revenue	12,931	10,890
Franchise and development fees
Disaggregation of Revenue [Line Items]
Total franchise revenue	$ 2,176	$ 3,434