Revenue Disclosures - Disaggregation of Franchise Revenue by Major Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Franchise revenues
Disaggregation of Revenue [Line Items]
Total franchise revenues	$ 631,936	$ 469,453	$ 651,186
Royalties
Disaggregation of Revenue [Line Items]
Total franchise revenues	292,372	215,214	302,169
Advertising fees
Disaggregation of Revenue [Line Items]
Total franchise revenues	274,790	201,494	283,015
Pancake and waffle dry mix sales and other
Disaggregation of Revenue [Line Items]
Total franchise revenues	51,250	38,936	53,973
Franchise and development fees
Disaggregation of Revenue [Line Items]
Total franchise revenues	$ 13,524	$ 13,809	$ 12,029