Basis of Presentation and Significant Accounting Policies - Balance Sheet (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Receivables (net of allowance for doubtful accounts)	$ 185,586	$ 125,870
Notes receivable, net of allowance	32,642	13,256
Other current assets	31,163	25,967
Intangible assets, net	263,923	100,492
Notes receivable, net of allowances	83,034	80,136
Deferred income taxes	32,730	27,224
Other assets	80,037	67,715
Accounts payable	71,684	67,839
Accrued expenses and other current liabilities	78,591	84,315
Deferred revenue	65,810	52,142
Liability for guest loyalty program	82,346	79,123
Long-term deferred revenue	107,370	98,459
Liability for guest loyalty program	50,085	48,701
Other liabilities	38,285	42,043
Retained earnings	775,675	627,272
Income taxes payable	$ 26,276	29,041
Financial Reporting Reclassification
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts payable		4,300
Deferred revenue		4,300
Income taxes payable		2,800
As Previously Reported
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Receivables (net of allowance for doubtful accounts)		125,452
Notes receivable, net of allowance		13,904
Other current assets		28,241
Intangible assets, net		14,672
Notes receivable, net of allowances		147,993
Deferred income taxes		13,335
Other assets		29,479
Accounts payable		67,839
Accrued expenses and other current liabilities		84,315
Deferred revenue		13,190
Liability for guest loyalty program		79,183
Long-term deferred revenue		18,335
Liability for guest loyalty program		48,738
Other liabilities		46,939
Retained earnings		673,771
Adoption of Topic 606 | Accounting Standards Update 2014-09
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Receivables (net of allowance for doubtful accounts)		418
Notes receivable, net of allowance		(648)
Other current assets		(2,274)
Intangible assets, net		85,820
Notes receivable, net of allowances		(67,857)
Deferred income taxes		13,889
Other assets		38,236
Accounts payable		0
Accrued expenses and other current liabilities		0
Deferred revenue		38,952
Liability for guest loyalty program		(60)
Long-term deferred revenue		80,124
Liability for guest loyalty program		(37)
Other liabilities		(4,896)
Retained earnings		$ (46,499)