Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue:
Total revenue	$ 340,879	$ 300,941	$ 617,541	$ 548,958
Operating costs and expenses:
Cost of revenue	59,423	51,934	81,908	70,927
Club operations	77,437	70,152	159,117	144,505
Selling, general and administrative	35,511	31,613	69,818	60,806
National advertising fund expense	22,777	20,112	44,721	39,904
Depreciation and amortization	38,429	39,817	76,710	79,197
Other losses (gains), net	4,900	(66)	3,663	418
Total operating costs and expenses	238,477	213,562	435,937	395,757
Income from operations	102,402	87,379	181,604	153,201
Other income (expense), net:
Interest income	5,690	5,616	11,502	11,077
Interest expense	(26,181)	(24,533)	(52,378)	(45,966)
Other income, net	1,942	1,043	2,225	1,690
Total other expense, net	(18,549)	(17,874)	(38,651)	(33,199)
Income before income taxes	83,853	69,505	142,953	120,002
Provision for income taxes	24,930	18,977	41,146	33,301
Losses from equity-method investments, net of tax	(628)	(1,216)	(1,433)	(2,416)
Net income	58,295	49,312	100,374	84,285
Less: net income attributable to non-controlling interests	276	672	488	1,336
Net income attributable to Planet Fitness, Inc.	$ 58,019	$ 48,640	$ 99,886	$ 82,949
Class A common stock
Net income per share of Class A common stock:
Basic (in usd per share)	$ 0.69	$ 0.56	$ 1.19	$ 0.95
Diluted (in usd per share)	$ 0.69	$ 0.56	$ 1.19	$ 0.95
Weighted-average shares of Class A common stock outstanding:
Basic (in shares)	83,861,016	86,808,695	84,014,883	86,859,039
Diluted (in shares)	84,065,228	86,955,179	84,232,536	87,083,282
Franchise
Revenue:
Total revenue	$ 96,877	$ 87,676	$ 190,117	$ 171,910
National advertising fund revenue
Revenue:
Total revenue	22,781	20,114	44,721	39,900
Corporate-owned clubs
Revenue:
Total revenue	138,989	125,466	272,658	247,844
Equipment
Revenue:
Total revenue	$ 82,232	$ 67,685	$ 110,045	$ 89,304