Revenue Disclosures - Disaggregation of Franchise Revenue by Major Type (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Franchisor
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 651,186	$ 643,934	$ 594,418
Royalties
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	302,169	311,568	297,817
Advertising fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	283,015	268,294	234,165
Pancake and waffle dry mix sales and other
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	53,973	52,108	50,538
Franchise and development fees
Disaggregation of Revenue [Line Items]
Revenue from contract with customer, excluding assessed tax	$ 12,029	$ 11,964	$ 11,898