Revenue Disclosures - Disaggregation of Franchise Revenue by Major Type (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Franchise revenues
Disaggregation of Revenue [Line Items]
Total franchise revenue	$ 67,876	$ 162,668	$ 212,913	$ 331,594
Royalties
Disaggregation of Revenue [Line Items]
Total franchise revenue	31,011	75,747	98,611	154,382
Advertising fees
Disaggregation of Revenue [Line Items]
Total franchise revenue	29,095	71,738	90,818	144,368
Pancake and waffle dry mix sales and other
Disaggregation of Revenue [Line Items]
Total franchise revenue	4,037	12,526	16,885	26,957
Franchise and development fees
Disaggregation of Revenue [Line Items]
Total franchise revenue	$ 3,733	$ 2,657	$ 6,599	$ 5,887