Significant Accounting Policies and Recently Issued Accounting Standards - Advertising and Promotional Expenses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Component of Other Expense, Nonoperating [Line Items]
Advertising and promotional expenses	$ 67,916	$ 65,473	$ 68,073
Direct lodging expenses [Member]
Component of Other Expense, Nonoperating [Line Items]
Advertising and promotional expenses	7,793	5,427	5,615
General and administrative expenses [Member]
Component of Other Expense, Nonoperating [Line Items]
Advertising and promotional expenses	1,675	1,649	1,249
Marketing, promotional and other advertising expenses [Member]
Component of Other Expense, Nonoperating [Line Items]
Advertising and promotional expenses	$ 58,448	$ 58,397	$ 61,209