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Goodwill and Other Intangibles - Additional Information (Details)
3 Months Ended 6 Months Ended
Feb. 28, 2017
USD ($)
Jun. 30, 2017
USD ($)
club
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
club
trade_name
Jun. 30, 2016
USD ($)
Goodwill [Line Items]          
Number of trade names | trade_name       4  
Number of clubs | club   149   149  
Impairment of goodwill | $ $ 0        
Period of financial forecast (in years)       3 years  
Terminal growth rate (as a percentage) 2.00%        
Intangible asset amortization expense | $   $ 7,000 $ 9,000 $ 12,000 $ 18,000
Switzerland Clubs [Member]          
Goodwill [Line Items]          
Number of clubs | club   3   3  
Discount rate (as a percentage) 11.20%