Accounts Payable and Accrued Liabilities - Summary of Accounts Payable and Accrued Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Payables And Accruals [Abstract]
Accounts payable	$ 16,546	$ 12,301
Advanced membership payments received	19,764	17,352
Other accrued liabilities	54,316	58,754
Total accounts payable and accrued liabilities	$ 90,626	$ 88,407