Revenue Disclosures - Disaggregation of Franchise Revenue by Major Type (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Franchise revenues
Disaggregation of Revenue [Line Items]
Total franchise revenue	$ 145,037	$ 168,926
Royalties
Disaggregation of Revenue [Line Items]
Total franchise revenue	67,600	78,730
Advertising fees
Disaggregation of Revenue [Line Items]
Total franchise revenue	61,723	72,630
Pancake and waffle dry mix sales and other
Disaggregation of Revenue [Line Items]
Total franchise revenue	12,848	14,431
Franchise and development fees
Disaggregation of Revenue [Line Items]
Total franchise revenue	$ 2,866	$ 3,135

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration