Revenue Disclosures - Disaggregation of Franchise Revenue by Major Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Franchisor
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 469,453	$ 651,186	$ 643,934
Royalties
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	215,214	302,169	311,568
Advertising fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	201,494	283,015	268,294
Pancake and waffle dry mix sales and other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	38,936	53,973	52,108
Franchise and development fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 13,809	$ 12,029	$ 11,964