Condensed consolidated statements of operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenue:
Franchise	$ 45,417	$ 32,791	$ 87,579	$ 63,072
Commission income	1,575	5,003	3,563	11,519
National advertising fund revenue	11,158	0	21,620	0
Corporate-owned stores	34,252	28,285	66,959	55,326
Equipment	48,148	41,237	82,161	68,501
Total revenue	140,550	107,316	261,882	198,418
Operating costs and expenses:
Cost of revenue	36,744	31,452	63,244	52,576
Store operations	18,047	14,604	36,403	29,788
Selling, general and administrative	17,210	14,768	34,831	28,588
National advertising fund expense	11,158	0	21,620	0
Depreciation and amortization	8,619	7,894	17,084	15,845
Other loss (gain)	(39)	348	971	316
Total operating costs and expenses	91,739	69,066	174,153	127,113
Income from operations	48,811	38,250	87,729	71,305
Other expense, net:
Interest expense, net	(8,628)	(9,028)	(17,361)	(17,791)
Other expense	(502)	(933)	(310)	(251)
Total other expense, net	(9,130)	(9,961)	(17,671)	(18,042)
Income before income taxes	39,681	28,289	70,058	53,263
Provision for income taxes	9,263	10,285	16,146	17,393
Net income	30,418	18,004	53,912	35,870
Less net income attributable to non-controlling interests	4,544	5,592	8,157	14,616
Net income attributable to Planet Fitness, Inc.	$ 25,874	$ 12,412	$ 45,755	$ 21,254
Class A Common Stock
Net income per share of Class A common stock:
Basic (in dollars per share)	$ 0.30	$ 0.16	$ 0.52	$ 0.30
Diluted (in dollars per share)	$ 0.29	$ 0.16	$ 0.52	$ 0.30
Weighted-average shares of Class A common stock outstanding:
Basic (in shares)	87,693,377	79,153,778	87,564,596	71,678,755
Diluted (in shares)	88,105,331	79,193,050	87,931,469	71,712,769