Condensed consolidated statements of operations - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue:
Franchise		$ 16,148	$ 13,009	$ 51,806	$ 40,834
Commission income		3,646	2,771	11,624	9,873
Corporate-owned stores		25,153	22,692	73,674	62,823
Equipment		23,870	24,995	87,588	70,228
Total revenue		68,817	63,467	224,692	183,758
Operating costs and expenses:
Cost of revenue		18,858	20,163	70,104	57,837
Store operations		14,305	12,494	43,354	35,818
Selling, general and administrative		17,348	8,582	43,840	23,296
Depreciation and amortization		7,976	8,542	24,160	23,585
Other (gain) loss		(9)	(269)	(76)	1,024
Total operating costs and expenses		58,478	49,512	181,382	141,560
Income from operations		10,339	13,955	43,310	42,198
Other expense, net:
Interest expense, net		(6,556)	(5,097)	(17,872)	(16,705)
Other expense		(1,815)	(447)	(2,627)	(1,089)
Total other expense, net		(8,371)	(5,544)	(20,499)	(17,794)
Income before income taxes		1,968	8,411	22,811	24,404
Provision for income taxes		1,230	108	1,921	892
Net income		738	8,303	20,890	23,512
Less net income attributable to non-controlling interests		4,631	176	4,857	494
Net income (loss) attributable to Planet Fitness, Inc.		$ (3,893)	$ 8,127	$ 16,033	$ 23,018
Class A Common Stock [Member]
Net income (loss) per share of Class A common stock:
Basic	[1]	$ 0.05		$ 0.05
Diluted	[1]	$ 0.04		$ 0.04
Weighted-average shares of Class A common stock outstanding:
Basic	[1]	35,661,000		35,661,000
Diluted	[1]	98,710,000		98,710,000

[1] Represents earnings per share of Class A common stock and weighted-average shares of Class A common stock outstanding for the period from August 6, 2015 through September 30, 2015, the period following the recapitalization transactions and IPO (see Note 14).