Summary of significant accounting policies (Tables)

12 Months Ended

Dec. 31, 2016

Accounting Policies [Abstract]

Schedule of Estimated Useful Lives of Fixed Assets

The estimated useful lives of the Company’s fixed assets by class of asset are as follows:

	Years
Buildings and building improvements	20–40
Computers and equipment	3
Furniture and fixtures	5
Leasehold improvements	Useful life or term of lease whichever is shorter
Fitness equipment	5–7
Vehicles	5

Summary of Company's Assets and Liabilities Measured at Fair Value on Recurring Basis

The table below presents information about the Company’s assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2016 and December 31, 2015:

			Quoted		Significant
	Total fair		prices		other		Significant
	value at		in active		observable		unobservable
	December 31,		markets		inputs		inputs
	2016		(Level 1)		(Level 2)		(Level 3)
Interest rate caps	$	306	$	—	$	306	$	—
			Quoted		Significant
	Total fair		prices		other		Significant
	value at		in active		observable		unobservable
	December 31,		markets		inputs		inputs
	2015		(Level 1)		(Level 2)		(Level 3)
Interest rate caps	$	1,147	$	—	$	1,147	$	—