Revenue Contract Balances (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2018	Dec. 31, 2017
Contract balances
Receivables, which are included in Accounts and notes receivable, net	$ 39,281	$ 39,281
Receivables, which are included in Advertising funds restricted assets	42,226	42,226
Deferred franchise fees at beginning of period		102,492
Revenue recognized during the period	(2,266)	(7,393)
New deferrals due to cash received and other		7,913
Deferred franchise fees at end of period	103,012	103,012
Deferred franchisee fees, current	10,490	10,490
Deferred franchise fees, noncurrent	$ 92,522	$ 92,522	$ 10,881