Deferred revenue from related parties.

No definition available.

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Namespace Prefix:	plnt_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount for accounts payable to related parties.

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- Definition

For an unclassified balance sheet, amounts due from related parties including affiliates, employees, joint ventures, officers and stockholders, immediate families thereof, and pension funds.

+ References

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-Name Accounting Standards Codification
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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount of selling, general and administrative expenses resulting from transactions, excluding transactions that are eliminated in consolidated or combined financial statements, with related party.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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- Details

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Balance Type:
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- Details

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- Details

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Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Related Party Transaction [Line Items]
Liability payable under tax benefit obligations	$ 31,784		$ 53,491
Administrative fees charged	593	$ 523
Area Development Agreements
Related Party Transaction [Line Items]
Deferred area development revenue from related parties	260		$ 256
Corporate Travel \| Affiliated Entity
Related Party Transaction [Line Items]
Expense incurred for corporate travel to a third-party company	49
Administrative Service \| Planet Fitness NAF, LLC
Related Party Transaction [Line Items]
Administrative fees charged	569	$ 674
Civil Action Brought By Former Employee \| Pending Litigation
Related Party Transaction [Line Items]
Receivables due from related parties	$ 420