Revenue - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	$ 317,423	$ 295,089	$ 535,463	$ 504,132
Non-Topic 606 revenues	261	352	541	703
Total revenues	317,684	295,441	536,004	504,835
Over time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	273,839	267,259	485,433	469,384
Point in time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	43,584	27,830	50,030	34,748
Royalty fees
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	106,427	103,219	186,780	179,917
Royalty fees | Over time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	106,427	103,219	186,780	179,917
Royalty fees | Point in time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	0	0	0	0
Initial franchise and relicensing fees
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	6,675	6,481	13,482	12,695
Initial franchise and relicensing fees | Over time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	6,675	6,481	13,482	12,695
Initial franchise and relicensing fees | Point in time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	0	0	0	0
Procurement services
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	20,829	17,833	32,776	27,771
Procurement services | Over time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	19,648	16,919	31,135	26,484
Procurement services | Point in time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	1,181	914	1,641	1,287
Marketing and reservation system
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	172,465	157,347	282,529	264,348
Marketing and reservation system | Over time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	130,203	130,616	234,281	231,744
Marketing and reservation system | Point in time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	42,262	26,731	48,248	32,604
Other
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	11,027	10,209	19,896	19,401
Other | Over time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	10,886	10,024	19,755	18,544
Other | Point in time
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Revenues	$ 141	$ 185	$ 141	$ 857