Intangible assets - Components of Franchise Rights and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Unamortized Intangible Assets	$ 23,014	$ 23,014
Amortized intangible assets, gross carrying amount	417,210	381,986
Accumulated Amortization	149,803	133,812
Amortized intangible assets, net carrying value	267,407	248,174
Gross Carrying Amount	440,224	405,000
Net Carrying Value	290,421	271,188
Franchise Rights
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	190,637	190,663
Accumulated Amortization	90,280	82,632
Amortized intangible assets, net carrying value	100,357	108,031
Franchise Agreement Acquisition Costs
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	198,352	164,174
Accumulated Amortization	41,667	34,986
Amortized intangible assets, net carrying value	156,685	129,188
Trademarks
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	14,300	14,055
Accumulated Amortization	10,961	10,562
Amortized intangible assets, net carrying value	3,339	3,493
Capitalized SaaS Licenses
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	10,880	5,468
Accumulated Amortization	5,261	2,903
Amortized intangible assets, net carrying value	5,619	2,565
Contract Acquisition Costs
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	0	5,389
Accumulated Amortization	0	1,763
Amortized intangible assets, net carrying value	0	3,626
Acquired Lease Rights
Finite-Lived Intangible Assets [Line Items]
Amortized intangible assets, gross carrying amount	3,041	2,237
Accumulated Amortization	1,634	966
Amortized intangible assets, net carrying value	$ 1,407	$ 1,271
Minimum | Franchise Rights | WoodSpring
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	12 years
Minimum | Franchise Agreement Acquisition Costs
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	5 years
Minimum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	8 years
Minimum | Capitalized SaaS Licenses
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	3 years
Minimum | Contract Acquisition Costs
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	5 years
Minimum | Acquired Lease Rights
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	39 months
Maximum | Franchise Rights | WoodSpring
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	20 years
Maximum | Franchise Agreement Acquisition Costs
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	30 years
Maximum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	40 years
Maximum | Capitalized SaaS Licenses
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	5 years
Maximum | Contract Acquisition Costs
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	12 years
Maximum | Acquired Lease Rights
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life	10 years