Condensed consolidated statements of operations - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenue:
Franchise		$ 25,506	$ 18,691	$ 46,997	$ 35,658
Commission income		3,973	3,188	10,159	7,978
Corporate-owned stores		26,383	24,975	52,080	48,521
Equipment		35,610	32,099	65,579	63,718
Total revenue		91,472	78,953	174,815	155,875
Operating costs and expenses:
Cost of revenue		27,801	25,300	51,440	51,246
Store operations		15,760	14,708	30,492	29,049
Selling, general and administrative		12,381	12,354	24,226	26,492
Depreciation and amortization		7,678	7,983	15,382	16,184
Other loss (gain)		21	(61)	(165)	(67)
Total operating costs and expenses		63,641	60,284	121,375	122,904
Income from operations		27,831	18,669	53,440	32,971
Other expense, net:
Interest expense, net		(6,161)	(6,560)	(12,528)	(11,316)
Other income (expense)		(160)	(76)	234	(812)
Total other expense, net		(6,321)	(6,636)	(12,294)	(12,128)
Income before income taxes		21,510	12,033	41,146	20,843
Provision for income taxes		3,419	419	6,709	691
Net income		18,091	11,614	34,437	20,152
Less net income attributable to non-controlling interests		13,959	113	26,936	226
Net income attributable to Planet Fitness, Inc.		$ 4,132	$ 11,501	$ 7,501	$ 19,926
Class A Common Stock [Member]
Net income per share of Class A common stock:
Basic	[1]	$ 0.11		$ 0.20
Diluted	[1]	$ 0.11		$ 0.20
Weighted-average shares of Class A common stock outstanding(1):
Basic	[1]	36,771,417		36,684,701
Diluted	[1]	36,773,112		36,686,187

[1] Represents earnings per share of Class A common stock and weighted-average shares of Class A common stock outstanding for the period following the recapitalization transactions and IPO (see Note 9).