Other Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
Accrued Liabilities And Deferred Credits [Line Items]
Accounts payable	$ 7,524	$ 4,376
Accrued compensation	2,664	2,655
Deferred revenue	17,864	15,289
Membership deposits and initiation fees	9,704	7,384
Advance deposits	1,468	3,419
Other accrued liabilities	5,185	4,977
Total other liabilities	47,259	40,950
Special Purpose Entities
Accrued Liabilities And Deferred Credits [Line Items]
Accrued interest expense for Senior Notes held by SPE	$ 2,850	$ 2,850