Summary of Significant Accounting Policies - Revenues (Details) $ in Millions	12 Months Ended
	Dec. 31, 2021 USD ($) hotel	Dec. 31, 2020 hotel
Revenue from External Customer [Line Items]
Current deferred revenue	$ 55.8
Long-term deferred revenue	$ 26.9
Loyalty points redemption period	3 years
Number of hotels acquired | hotel	6	5
Minimum
Revenue from External Customer [Line Items]
Franchise agreement initial term in years	10 years
Franchise fee period	5 years
Maximum
Revenue from External Customer [Line Items]
Franchise agreement initial term in years	30 years
Franchise fee period	10 years