Revenue Textual (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from External Customer [Line Items]
Current deferred revenue	$ 33,100				$ 52,142				$ 33,100	$ 52,142
Long-term deferred revenue	20,700				98,459				20,700	98,459
Revenue, remaining performance obligation, amount	153,200								153,200
Capitalized franchise sales commissions	51,929				46,050				51,929	46,050
Revenues	$ 244,979	$ 291,490	$ 295,441	$ 209,394	$ 221,483	$ 269,930	$ 261,016	$ 188,868	$ 1,041,304	941,297	$ 807,909
Minimum
Revenue from External Customer [Line Items]
Franchise agreement initial term in years									10 years
Franchise fee									5 years
Maximum
Revenue from External Customer [Line Items]
Franchise agreement initial term in years									30 years
Franchise fee									10 years
Selling, General and Administrative Expenses
Revenue from External Customer [Line Items]
Amortization expense and impairment loss									$ 9,000	7,800	7,100
Selling, General and Administrative Expenses and Marketing and Reservation System Expenses
Revenue from External Customer [Line Items]
Amortization expense and impairment loss									$ 300	$ 300	$ 500