Goodwill and Intangible Assets - Additional Information (Details) $ in Thousands		3 Months Ended			9 Months Ended		12 Months Ended
	Jun. 05, 2023 USD ($) Studio	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($) Studio	Dec. 31, 2023 USD ($)	Dec. 01, 2023 USD ($)
Goodwill [Line Items]
Goodwill		$ 163,036			$ 163,036		$ 171,601
Impairment charge					21,024		$ 10,113
Amortization expense		$ 2,717		$ 2,736	$ 8,592	$ 8,576
Weighted average cost of capital discount rate			16.00%	16.00%		16.00%
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]			Asset Impairment Charges	Asset Impairment Charges	Asset Impairment Charges
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)					$ 179
Trademark
Goodwill [Line Items]
Impairment, Intangible Asset, Indefinite-Lived (Excluding Goodwill), Statement of Income or Comprehensive Income [Extensible Enumeration]				Asset Impairment Charges
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)				$ 180
Studios
Goodwill [Line Items]
Goodwill	$ 4,133
Intangible assets	$ 7,238			7,238		$ 7,238
Number of studios purchased | Studio	14					14
CycleBar
Goodwill [Line Items]
Goodwill			$ 0
Impairment charge			10,911
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)			$ 1,178
Lindora
Goodwill [Line Items]
Goodwill								$ 2,346
Goodwill increased due to acquisition					$ 2,346
Stride And Row House
Goodwill [Line Items]
Goodwill				0		$ 0
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)				230
Stride
Goodwill [Line Items]
Impairment charge						$ 3,469
Row House
Goodwill [Line Items]
Impairment charge				$ 700
Maximum
Goodwill [Line Items]
Estimated future net cash flows discounted rate			3.00%	43.00%		43.00%
Minimum
Goodwill [Line Items]
Estimated future net cash flows discounted rate			(1.00%)	8.00%		8.00%