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Acquisitions - Schedule of Net Assets Acquired (Details) - USD ($)
$ in Thousands
Sep. 30, 2017
Sep. 11, 2017
Dec. 31, 2016
Business Acquisition [Line Items]      
Goodwill $ 6,774   $ 1,008
Lucille Roberts Health Clubs [Member]      
Business Acquisition [Line Items]      
Fixed assets   $ 959  
Goodwill   5,708  
Deferred revenue   (796)  
Other liabilities   (21)  
Total allocation of purchase price   9,450  
Lucille Roberts Health Clubs [Member] | Membership Lists [Member]      
Business Acquisition [Line Items]      
Definite lived intangible assets   1,400  
Lucille Roberts Health Clubs [Member] | Trade Names [Member]      
Business Acquisition [Line Items]      
Definite lived intangible assets   700  
Lucille Roberts Health Clubs [Member] | Favorable Lease Commitment [Member]      
Business Acquisition [Line Items]      
Definite lived intangible assets   $ 1,500