Commitments and Contingencies - Narrative (Details)		12 Months Ended
	Oct. 11, 2019 CAD ($)	Dec. 31, 2019 USD ($)	Feb. 11, 2020 USD ($)	Jan. 21, 2020 USD ($)	Oct. 11, 2019 USD ($)	Oct. 10, 2019 USD ($)	Dec. 31, 2018 USD ($)
Commitments And Contingencies Disclosure [Line Items]
Loan due In full, term (in days)		90 days
Portion that company might be obligated to repay in the event franchisees defaulted		$ 29,400,000
Fair value of franchise related borrowings		300,000					$ 300,000
Loan facility maximum commitment amount					$ 40,000,000.0	$ 55,000,000.0
Accrued regulatory expense		182,900,000					1,400,000
Insurance receivable		5,700,000
Liability reserve		400,000					500,000
Minimum
Commitments And Contingencies Disclosure [Line Items]
Loss contingency in excess of accrual, range of possible loss		0
Minimum range of possible loss		0
Maximum
Commitments And Contingencies Disclosure [Line Items]
Loss contingency in excess of accrual, range of possible loss		2,000,000.0
Minimum range of possible loss		1,000,000.0
Unused Credit Card Lines
Commitments And Contingencies Disclosure [Line Items]
Remaining credit available		225,000,000.0					$ 316,400,000
Marketing and Advertising Expense
Commitments And Contingencies Disclosure [Line Items]
Non-cancelable commitments		30,900,000
Non-cancelable commitments due in 2020		18,300,000
Non-cancelable commitments due in 2021		11,000,000.0
Non-cancelable commitments due in 2022		1,600,000
Canada
Commitments And Contingencies Disclosure [Line Items]
Loan facility maximum Canadian sub facility commitment amount	$ 25,000,000.0
Subsequent Event
Commitments And Contingencies Disclosure [Line Items]
Loan facility maximum commitment amount			$ 25,000,000.0	$ 35,000,000.0
Federal Trade Commission Inquiry
Commitments And Contingencies Disclosure [Line Items]
Accrued regulatory expense		179,300,000
Accrued professional fees		4,300,000
Litigation settlement, amount awarded to other party		$ 175,000,000.0