Business Acquisition (Details) - USD ($)		12 Months Ended
	Dec. 31, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Maximum revolving secured credit line	$ 20,000,000	$ 20,000,000
Goodwill	60,470,000	60,470,000	$ 2,520,000	$ 2,740,000
Goodwill, acquired during period		58,357,000
Octane Fitness
Business Acquisition [Line Items]
Purchase price	115,000,000
Acquisition costs		600,000
Goodwill	58,357,000	58,357,000
JPMorgan Chase Bank, N.A. | Term Loan | Line of Credit
Business Acquisition [Line Items]
Maximum revolving secured credit line	80,000,000	80,000,000
JPMorgan Chase Bank, N.A. | Term Loan | Line of Credit | Octane Fitness
Business Acquisition [Line Items]
Maximum revolving secured credit line	$ 80,000,000.0	$ 80,000,000.0