Planet Fitness (PLNT) 10-K 6 Mar 17 2016 FY Annual report Financial data

Document and Entity Information

Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Mar. 01, 2017	Jun. 30, 2016
Document Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2016
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	FY
Trading Symbol	PLNT
Entity Registrant Name	PLANET FITNESS, INC.
Entity Central Index Key	1,637,207
Current Fiscal Year End Date	--12-31
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Filer Category	Non-accelerated Filer
Entity Public Float			$ 510.2
Class A Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		62,182,791
Class B Common Stock [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		36,315,932

Consolidated balance sheets

Consolidated balance sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 40,393	$ 31,430
Accounts receivable, net of allowance for bad debts of $687 and $629 at December 31, 2016 and 2015, respectively	26,873	19,079
Due from related parties	2,864	4,940
Inventory	1,802	4,557
Restricted assets – NAF (note 5)	3,074	1,962
Prepaid expenses	3,591	5,152
Other receivables	7,935	5,825
Income tax receivable	4,693
Total current assets	91,225	72,945
Property and equipment, net	61,238	56,139
Intangible assets, net	253,862	273,619
Goodwill	176,981	176,981
Deferred income taxes	410,407	117,358
Other assets, net	7,729	2,135
Total assets	1,001,442	699,177
Current liabilities:
Current maturities of long-term debt	7,185	5,100
Accounts payable	28,507	23,950
Accrued expenses	19,190	13,667
Equipment deposits	2,170	5,587
Deferred revenue, current	17,780	14,717
Payable to related parties pursuant to tax benefit arrangements, current	8,072	3,019
Other current liabilities	369	212
Total current liabilities	83,273	66,252
Long-term debt, net of current maturities	702,003	479,779
Deferred rent, net of current portion	5,108	4,554
Deferred revenue, net of current portion	8,351	12,016
Deferred tax liabilities	1,238
Payable to related parties pursuant to tax benefit arrangements, net of current portion	410,999	137,172
Other liabilities	5,225	484
Total noncurrent liabilities	1,132,924	634,005
Commitments and contingencies (note 16)
Stockholders' equity:
Accumulated other comprehensive loss	(1,174)	(1,710)
Additional paid in capital	34,467	352
Accumulated deficit	(164,062)	(14,032)
Total stockholders' deficit attributable to Planet Fitness, Inc.	(130,759)	(15,380)
Non-controlling interests	(83,996)	14,300
Total stockholders' deficit	(214,755)	(1,080)
Total liabilities and stockholders' deficit	1,001,442	699,177
Class A Common Stock [Member]
Stockholders' equity:
Common stock, value	6	4
Class B Common Stock [Member]
Stockholders' equity:
Common stock, value	$ 4	$ 6

Consolidated balance sheets (Pa

Consolidated balance sheets (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Accounts receivable, allowance for bad debts	$ 687	$ 629
Class A Common Stock [Member]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	61,314,000	36,598,000
Common stock, shares outstanding	61,314,000	36,598,000
Class B Common Stock [Member]
Common stock, par value	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	37,185,000	62,112,000
Common stock, shares outstanding	37,185,000	62,112,000

Consolidated statements of oper

Consolidated statements of operations - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenue:
Franchise		$ 97,374	$ 71,762	$ 58,001
Commission income		19,114	16,323	13,805
Corporate-owned stores		104,721	98,390	85,041
Equipment		157,032	144,062	122,930
Total revenue		378,241	330,537	279,777
Operating costs and expenses:
Cost of revenue		122,317	113,492	100,306
Store operations		60,121	57,485	49,476
Selling, general and administrative		50,008	55,573	35,121
Depreciation and amortization		31,502	32,158	32,341
Other (gain) loss		(1,369)	(273)	994
Total operating costs and expenses		262,579	258,435	218,238
Income from operations		115,662	72,102	61,539
Other expense, net:
Interest expense, net		(27,125)	(24,549)	(21,800)
Other income (expense)		1,371	(275)	(1,261)
Total other expense, net		(25,754)	(24,824)	(23,061)
Income before income taxes		89,908	47,278	38,478
Provision for income taxes		18,661	9,148	1,183
Net income		71,247	38,130	37,295
Less net income attributable to non-controlling interests		49,747	19,612	487
Net income attributable to Planet Fitness, Inc.		$ 21,500	$ 18,518	$ 36,808
Class A Common Stock [Member]
Net income per share of Class A common stock:
Basic	[1]	$ 0.50	$ 0.11
Diluted	[1]	$ 0.50	$ 0.11
Weighted-average shares of Class A common stock outstanding:
Basic	[1]	43,300,288	36,244,000
Diluted	[1]	43,304,685	36,244,000
[1]	For the year ended December 31, 2015, 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 December 31, 2015, the period following the recapitalization transactions and IPO (see Note 14).

Consolidated statements of comp

Consolidated statements of comprehensive income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Statement Of Income And Comprehensive Income [Abstract]
Net income including non-controlling interests	$ 71,247	$ 38,130	$ 37,295
Other comprehensive (loss) income, net:
Loss on interest rate swaps, net of tax			(92)
Unrealized loss on interest rate caps, net of tax	(78)	(1,388)	(662)
Foreign currency translation adjustments	(72)	314	26
Total other comprehensive loss, net	(150)	(1,074)	(728)
Total comprehensive income including non-controlling interests	71,097	37,056	36,567
Less: total comprehensive income attributable to non-controlling interests	49,560	19,557	487
Total comprehensive income attributable to Planet Fitness, Inc.	$ 21,537	$ 17,499	$ 36,080

Consolidated statements of cash

Consolidated statements of cash flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 71,247	$ 38,130	$ 37,295
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	31,502	32,158	32,341
Amortization of deferred financing costs	1,544	1,596	1,315
Amortization of favorable leases and asset retirement obligations	392	478	501
Amortization of interest rate caps	797	28
Deferred tax expense (benefit)	15,606	6,135	(63)
Loss (gain) on re-measurement of tax benefit arrangement	72	(2,549)
Provision for bad debts	59	667	139
Gain on disposal of property and equipment	(514)	(273)	(545)
Loss on extinguishment of debt	606		4,697
Third party debt refinancing expense	3,001
Equity-based compensation	1,728	4,877
Changes in operating assets and liabilities, excluding effects of acquisitions:
Accounts receivable	(7,754)	(414)	(3,632)
Notes receivable and due from related parties	1,897	4,210	177
Inventory	2,755	(1,545)	(769)
Other assets and other current assets	(7,944)	(5,720)	(1,818)
Accounts payable and accrued expenses	7,428	263	5,042
Other liabilities and other current liabilities	2,747	99	(2)
Income taxes	(5,993)	115	(1,670)
Payments to related parties pursuant to tax benefit arrangements	(6,922)
Equipment deposits	(3,417)	(1,088)	4,028
Deferred revenue	(652)	2,994	842
Deferred rent	632	1,502	1,527
Net cash provided by operating activities	108,817	81,663	79,405
Cash flows from investing activities:
Additions to property and equipment	(15,377)	(19,488)	(16,650)
Acquisition of franchises			(38,638)
Proceeds from sale of property and equipment	683	327	926
Net cash used in investing activities	(14,694)	(19,161)	(54,362)
Cash flows from financing activities:
Proceeds from issuance of Class A common stock sold in initial public offering, net of underwriting discounts and commissions		156,946
Use of proceeds from issuance of Class A common stock to purchase Holdings Units		(156,946)
Proceeds from issuance of long-term debt	230,000	120,000	390,000
Proceeds from issuance of Class A common stock	136
Principal payments on capital lease obligations	(46)	(376)	(1,162)
Repayment of long-term debt	(5,621)	(14,800)	(185,800)
Payment of deferred financing and other debt-related costs	(5,220)	(1,698)	(7,785)
Premiums paid for interest rate caps		(880)	(2,373)
Repurchase and retirement of Class B common stock	(1,583)
Distributions to variable interest entities			(458)
Dividend paid to holders of Class A common stock	(169,282)
Dividend equivalent paid to members of Pla-Fit Holdings	(101,729)	(140,000)	(173,900)
Distributions to members of Pla-Fit Holdings	(31,838)	(36,486)	(31,474)
Net cash used in financing activities	(85,183)	(74,240)	(12,952)
Effects of exchange rate changes on cash and cash equivalents	23	(123)	(67)
Net increase (decrease) in cash and cash equivalents	8,963	(11,861)	12,024
Cash and cash equivalents, beginning of period	31,430	43,291	31,267
Cash and cash equivalents, end of period	40,393	31,430	43,291
Supplemental cash flow information:
Net cash paid for income taxes	7,040	2,834	1,604
Cash paid for interest	24,302	23,220	20,756
Non-cash investing activities:
Non-cash consideration for acquisition of franchises			3,000
Non-cash additions to property and equipment	2,203	$ 207	1,049
Non-cash financing activities:
Non-cash distributions to members			$ 901
Non-cash dividend equivalent payments	$ 3,899

Consolidated statement of chang

Consolidated statement of changes in equity - USD ($) $ in Thousands	Total	Members' Equity [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Additional Paid-in capital [Member]	Accumulated Deficit [Member]	Non-Controlling Interests [Member]	Class A Common Stock [Member]	Class A Common Stock [Member]Common Stock [Member]	Class B Common Stock [Member]	Class B Common Stock [Member]Common Stock [Member]
Beginning balance at Dec. 31, 2013	$ 321,915	$ 315,623	$ 92			$ 6,200
Net income including non-controlling interests	37,295	36,808				487
Other comprehensive loss	(728)		(728)
Distributions to members	(206,733)	(206,275)				(458)
Ending balance at Dec. 31, 2014	151,749	146,156	(636)			6,229
Net income including non-controlling interests	38,130
Other comprehensive loss	(1,074)
Distributions to members prior to the recapitalization transactions	(164,693)	(164,693)
Net income prior to the recapitalization transactions	14,676	14,412				264
Other comprehensive loss prior to the recapitalization transactions	(1,054)		(1,054)
Equity-based compensation expense recorded in connection with recapitalization transactions	4,525	4,525
Effect of the recapitalization transactions		$ (400)			$ 138	252		$ 3		$ 7
Effect of the recapitalization transactions, shares							26,107,000		72,603,000
Issuance of Class A common stock in IPO, net of commissions								1		(1)
Issuance of Class A common stock in IPO, net of commissions, shares							10,491,000		(10,491,000)
Tax benefit arrangement liability and deferred taxes arising from the recapitalization transactions and IPO	(18,276)				(18,276)
Net income subsequent to the recapitalization transactions	23,454				4,106	19,348
Equity-based compensation expense	352			$ 352
Distributions to members of Pla-Fit Holdings subsequent to the recapitalization transactions	(11,793)					(11,793)
Other comprehensive loss subsequent to the recapitalization transactions	(20)		(20)
Ending balance at Dec. 31, 2015	(1,080)		(1,710)	352	(14,032)	14,300		4		6
Ending balance (shares) at Dec. 31, 2015							36,598,000		62,112,000
Net income including non-controlling interests	71,247				21,500	49,747
Other comprehensive loss	(150)		37			(187)
Distributions to members	(31,838)					(31,838)
Issuance of Class A common stock in IPO, net of commissions, shares							1,271,146
Equity-based compensation expense	1,728			1,749	(21)
Repurchase and retirement of Class B common stock	(1,583)			(441)	(1,142)				$ (222)
Exchanges of Class B common stock			499	10,976		(11,475)		2		(2)
Exchanges of Class B common stock, shares							24,705,000		(24,705,000)
Tax benefit arrangement liability and deferred taxes arising from secondary offerings and other exchanges	21,695			21,695
Exercise of stock options and vesting of restricted share units	136			136
Exercise of stock options and vesting of restricted share units, shares							11,000
Dividend paid to holders of Class A common stock	(169,282)				(169,282)
Dividend equivalents paid or payable	(105,628)				(1,085)	(104,543)
Ending balance at Dec. 31, 2016	$ (214,755)		$ (1,174)	$ 34,467	$ (164,062)	$ (83,996)		$ 6		$ 4
Ending balance (shares) at Dec. 31, 2016							61,314,000		37,185,000

Business organization

Business organization	12 Months Ended
	Dec. 31, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Business organization	(1) Business organization Planet Fitness, Inc. (the “Company”), through its subsidiaries, is a franchisor and operator of fitness centers, with approximately 8.9 million members and 1,313 owned and franchised locations (referred to as stores) in 48 states, the District of Columbia, Puerto Rico, the Dominican Republic and Canada as of December 31, 2016. The Company serves as the reporting entity for its various subsidiaries that operate three distinct lines of business: • Licensing and selling franchises under the Planet Fitness trade name; • Owning and operating fitness centers under the Planet Fitness trade name; and • Selling fitness-related equipment to franchisee-owned stores. In 2012 investment funds affiliated with TSG Consumer Partners, LLC (“TSG”), purchased interests in Pla-Fit Holdings. The Company was formed as a Delaware corporation on March 16, 2015 for the purpose of facilitating an initial public offering (the “IPO”) and related transactions in order to carry on the business of Pla-Fit Holdings, LLC and its subsidiaries (“Pla-Fit Holdings”). As of August 5, 2015, in connection with the recapitalization transactions discussed below, the Company became the sole managing member and holder of 100% of the voting power of Pla-Fit Holdings. Pla-Fit Holdings owns 100% of Planet Intermediate, LLC which has no operations but is the 100% owner of Planet Fitness Holdings, LLC, a franchisor and operator of fitness centers. With respect to the Company, Pla-Fit Holdings and Planet Intermediate, LLC, each entity owns nothing other than the respective entity below it in the corporate structure and each entity has no other material operations. Initial Public Offering On August 11, 2015, the Company completed an IPO pursuant to which the Company and selling stockholders sold an aggregate of 15,525,000 shares of Class A common stock at a public offering price of $16.00 per share. The Company received $156,946 in proceeds from its sale of 10,491,055 shares of Class A common stock, net of underwriting discounts and commissions, which were used to purchase an equal number of limited liability company units (“Holdings Units”) from existing holders (“Continuing LLC Owners”) of interests in Pla-Fit Holdings, at a purchase price per unit equal to the IPO price per share of Class A common stock, net of underwriting discounts and commissions. Subsequent to the IPO and the related recapitalization transactions, the Company is a holding company whose principal asset is a controlling equity interest in Pla-Fit Holdings. As the sole managing member of Pla-Fit Holdings, the Company operates and controls all of the business and affairs of Pla-Fit Holdings, and through Pla-Fit Holdings, conducts its business. As a result, the Company consolidates Pla-Fit Holdings’ financial results and reports a non-controlling interest related to the portion of Holdings Units not owned by the Company. The recapitalization transactions are considered transactions between entities under common control. As a result, the financial statements for periods prior to the IPO and the recapitalization transactions are the financial statements of Pla-Fit Holdings as the predecessor to the Company for accounting and reporting purposes. Unless otherwise specified, “the Company” refers to both Planet Fitness, Inc. and Pla-Fit Holdings throughout the remainder of these notes. Secondary offerings In June 2016, the Company completed a secondary offering (“June Secondary Offering”) of 11,500,000 shares of its Class A common stock at a price of $16.50 per share. All of the shares sold in the June Secondary Offering were offered by certain Continuing LLC Owners and TSG AIV II-A L.P and TSG PF Co-Investors A L.P. (“Direct TSG Investors”). The Company did not receive any proceeds from the sale of shares of Class A common stock offered by the Direct TSG Investors and the participating Continuing LLC Owners. The shares sold in the June Secondary Offering consisted of (i) 3,608,840 existing shares of Class A common stock held by the Direct TSG Investors and (ii) 7,891,160 newly-issued shares of Class A common stock issued in connection with the exercise of the exchange right by the Continuing LLC Owners that participated in the June Secondary Offering. Simultaneously, and in connection with the exchange, 7,891,160 shares of Class B common stock were surrendered by the Continuing LLC Owners that participated in the June Secondary Offering and canceled. Additionally, in connection with the exchange, Planet Fitness, Inc. received 7,891,160 Holdings Units, increasing its total ownership interest in Pla-Fit Holdings. Immediately preceding the June Secondary Offering, Planet Fitness, Inc. held 100% of the voting interest and 37.1% of the economic interest of Pla-Fit Holdings and the Continuing LLC Owners held the remaining 62.9% economic interest in Pla-Fit Holdings. Immediately following the completion of the June Secondary Offering, Planet Fitness, Inc. held 100% of the voting interest and 45.1% of the economic interest of Pla-Fit Holdings and the Continuing LLC Owners held the remaining 54.9% economic interest in Pla-Fit Holdings. In September 2016, the Company completed a secondary offering (“September Secondary Offering”) of 8,000,000 shares of its Class A common stock at a price of $19.62 per share. All of the shares sold in the September Secondary Offering were offered by the Direct TSG Investors and participating Continuing LLC Owners. The Company did not receive any proceeds from the sale of shares of Class A common stock offered by the Direct TSG Investors and the Continuing LLC Owners that participating in the September Secondary Offering. The shares sold in the September Secondary Offering consisted of (i) 2,593,981 existing shares of Class A common stock held by the Direct TSG Investors and (ii) 5,406,019 newly-issued shares of Class A common stock issued in connection with the exercise of the exchange right by the Continuing LLC Owners that participated in the September Secondary offering. Simultaneously, and in connection with the exchange, 5,406,019 shares of Class B common stock were surrendered by the Continuing LLC Owners that participated in the September Secondary Offering and canceled. Additionally, in connection with the exchange, Planet Fitness, Inc. received 5,406,019 Holdings Units, increasing its total ownership interest in Pla-Fit Holdings. Immediately preceding the September Secondary Offering, Planet Fitness, Inc. held 100% of the voting interest and 45.1% of the economic interest of Pla-Fit Holdings and the Continuing LLC Owners held the remaining 54.9% economic interest in Pla-Fit Holdings. Immediately following the completion of the September Secondary Offering and as of September 30, 2016, Planet Fitness, Inc. held 100% of the voting interest and 50.6% of the economic interest of Pla-Fit Holdings and the Continuing LLC Owners held the remaining 49.4% economic interest in Pla-Fit Holdings. In November 2016, the Company completed a secondary offering (“November Secondary Offering”) of 15,000,000 shares of its Class A common stock at a price of $23.22 per share. All of the shares sold in the November Secondary Offering were offered by the Direct TSG Investors and participating Continuing LLC Owners. The Company did not receive any proceeds from the sale of shares of Class A common stock offered by the Direct TSG Investors and the Continuing LLC Owners that participating in the September Secondary Offering. The shares sold in the November Secondary Offering consisted of (i) 4,863,715 existing shares of Class A common stock held by the Direct TSG Investors and (ii) 10,136,285 newly-issued shares of Class A common stock issued in connection with the exercise of the exchange right by the Continuing LLC Owners that participated in the November Secondary offering. Simultaneously, and in connection with the exchange, 10,136,285 shares of Class B common stock were surrendered by the Continuing LLC Owners that participated in the November Secondary Offering and canceled. Additionally, in connection with the exchange, Planet Fitness, Inc. received 10,136,285 Holdings Units, increasing its total ownership interest in Pla-Fit Holdings. Immediately preceding the November Secondary Offering, Planet Fitness, Inc. held 100% of the voting interest and 51.5% of the economic interest of Pla-Fit Holdings and the Continuing LLC Owners held the remaining 48.5% economic interest in Pla-Fit Holdings. Immediately following the completion of the November Secondary Offering and as of November 22, 2016, Planet Fitness, Inc. held 100% of the voting interest and 61.8% of the economic interest of Pla-Fit Holdings and the Continuing LLC Owners held the remaining 38.2% economic interest in Pla-Fit Holdings. In addition to the secondary offering transactions described above, during the year ending December 31, 2016, certain Continuing LLC Owners have exercised their exchange rights and exchanged 1,271,146 Holdings Units for 1,271,146 newly-issued shares of Class A common stock. Simultaneously, and in connection with these exchanges, 1,271,146 shares of Class B common stock were surrendered by the Continuing LLC Owners that exercised their exchange rights and canceled. Additionally, in connection with these exchanges, Planet Fitness, Inc. received 1,271,146 Holdings Units, increasing its total ownership interest in Pla-Fit Holdings. As of December 31, 2016, the Company held 100% of the voting interest, and approximately 62.3% of the economic interest in Pla-Fit Holdings and the Continuing LLC Owners held the remaining 37.7% economic interest in Pla-Fit Holdings. As future exchanges of Holdings Units occur, the economic interest in Pla-Fit Holdings held by Planet Fitness, Inc. will increase.

Summary of significant accounti

Summary of significant accounting policies	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Summary of significant accounting policies	(2) Summary of significant accounting policies (a) Basis of presentation and consolidation The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) and pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). All significant intercompany balances and transactions have been eliminated in consolidation. As discussed in Note 1, as a result of the recapitalization transactions, Planet Fitness, Inc. consolidates Pla-Fit Holdings and Pla-Fit Holdings is considered to be the predecessor to Planet Fitness, Inc. for accounting and reporting purposes. The Company also consolidates entities in which it has a controlling financial interest, the usual condition of which is ownership of a majority voting interest. The Company also considers for consolidation certain interests where the controlling financial interest may be achieved through arrangements that do not involve voting interests. Such an entity, known as a variable interest entity (“VIE”), is required to be consolidated by its primary beneficiary. The primary beneficiary of a VIE is considered to possess the power to direct the activities of the VIE that most significantly impact its economic performance and has the obligation to absorb losses or the rights to receive benefits from the VIE that are significant to it. The principal entities in which the Company possesses a variable interest include franchise entities and certain other entities. The Company is not deemed to be the primary beneficiary for Planet Fitness franchise entities. Therefore, these entities are not consolidated. The results of the Company have been consolidated with Matthew Michael Realty LLC (“MMR”) and PF Melville LLC (“PF Melville”) based on the determination that the Company is the primary beneficiary with respect to these VIEs. These entities are real estate holding companies that derive a majority of their financial support from the Company through lease agreements for corporate stores. See Note 3 for further information related to the Company’s VIEs. (b) Use of estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Although these estimates are based on management’s knowledge of current events and actions it may undertake in the future, they may ultimately differ from actual results. Significant areas where estimates and judgments are relied upon by management in the preparation of the consolidated financial statements include revenue recognition, valuation of assets and liabilities in connection with acquisitions, valuation of equity-based compensation awards, the evaluation of the recoverability of goodwill and long-lived assets, including intangible assets, income taxes, including deferred tax assets and liabilities and reserves for unrecognized tax benefits, and the liability for the Company’s tax benefit arrangements. (c) Concentrations Cash and cash equivalents are financial instruments, which potentially subject the Company to a concentration of credit risk. The Company invests its excess cash in several major financial institutions, which are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000. The Company maintains balances in excess of these limits, but does not believe that such deposits with its banks are subject to any unusual risk. The credit risk associated with trade receivables is mitigated due to the large number of customers, generally our franchisees, and their broad dispersion over many different geographic areas. We do not have any concentrations with respect to our revenues. The Company purchases equipment, both for corporate-owned stores and for sales to franchisee-owned stores, from two primary vendors. For the year ended December 31, 2016 purchases from these two vendors comprised 83% and 13%, respectively, for the year ended December 31, 2015 purchases from these two vendors comprised 79% and 18%, respectively, and for the year ended December 31, 2014 purchases from these two vendors comprised 66% and 25%, respectively, of total equipment purchases. The Company, including Planet Fitness NAF, LLC (“NAF”) uses two primary vendors for advertising services. For year ended December 31, 2016, purchases from these two vendors comprised 25% and 16%, respectively, for the year ended December 31, 2015 purchases from these two vendors comprised 49% and 0%, respectively, and for the year ended December 31, 2014 purchases from these two vendors comprised 61% and 0%, respectively, of total advertising purchases (see Note 5 for further discussion of NAF). (d) Cash and cash equivalents The Company considers all highly liquid investments purchased with an original maturity of 90 days or less to be cash equivalents. Cash held within the NAF is recorded as a restricted asset (see Note 5). (e) Revenue recognition Franchise revenue The following revenues are generated as a result of transactions with or related to the Company’s franchisees. Area development fees Franchisees contractually enter into area development agreements (ADAs) to secure the exclusive right to open franchise stores within a defined geographical area. ADAs establish the timing and number of stores to be developed within the defined geographical area. Pursuant to an ADA, a franchisee is generally required to pay an initial nonrefundable development fee for a minimum number of stores to be developed, as outlined in the respective ADA. ADA fees collected in advance are deferred until the Company provides substantially all required obligations pursuant to the ADA. As the efforts and total cost relating to initial services are affected significantly by the number of stores opened in an area, the respective ADA is treated as a divisible contract. As each new site is accepted under an ADA, a franchisee signs a franchise operating agreement for the respective franchise location. As each store opened under an ADA typically has performance obligations associated with it, the Company recognizes ADA revenue as each individual franchise location is developed in proportion to the total number of stores to be developed under the ADA. These obligations are typically completed once the store is opened or the franchisee executes the individual property lease. As of December 31, 2016 and 2015, the deferred revenue for ADAs was $10,026 and $10,471, respectively. ADAs generally have an initial term equal to the number of years over which the franchisee is required to open franchise stores, which is typically 5 to 10 years. There is no right of refund for an executed ADA. Upon default, as defined in the agreement, the Company may reacquire the rights pursuant to an ADA, and all remaining deferred revenue is recognized at that time. Franchise fees and performance fees The Company generally charges an initial upfront nonrefundable franchise fee. Nonrefundable franchise fees are typically deferred until the franchisee executes a lease and receives initial training for the location, which is the point at which the Company has determined it has provided all of its material obligations required to recognize revenue. As of December 31, 2016 and 2015, the Company has recorded deferred franchise fees of $260 and $473, respectively, relating to stores to be opened in future years. These amounts are included in deferred revenue as of December 31, 2016 and 2015. The individual franchise agreements typically have a 10-year initial term, but provide the franchisee with an opportunity to enter into successive renewals subject to certain conditions. Transfer fees The Company’s current franchise agreement provides that upon the transfer of a Planet Fitness store to a different franchisee, the Company is entitled to a transfer fee in the amount of the greater of $25, or $10 per store being transferred, if more than one, in addition to reimbursement of out-of-pocket expenses, including external legal and administrative costs incurred in connection with the transfer. Transfer-related fees and expenses are due, payable, and recognized at the time the transfer is effectuated. Royalties Royalties, which represent recurring fees paid by franchisees based on the franchisee-owned stores’ monthly membership billings, are recognized on a monthly basis over the term of the franchise agreement. As specified under certain franchise agreements, the Company recognizes additional royalty fees as the franchisee-owned stores attain contractual monthly membership billing threshold amounts. Beginning in 2010, for all new franchise agreements entered into, the Company began charging a fixed royalty percentage based upon gross membership billings. Other fees Online member join fees are paid to the Company by franchisees for processing new membership transactions when a new member signs up for a membership to a franchisee-owned store through the Company’s website. Billing transaction fees are paid to the Company for the processing of franchisee membership dues and annual fees through the Company’s third-party hosted point-of-sale system. Placement The Company is generally responsible for assembly and placement of equipment it sells to franchisee-owned stores. Placement revenue is recognized upon completion and acceptance of the services at the franchise location. Commission income The Company recognizes commission income from its franchisees’ use of preferred vendor arrangements. Commissions are recognized when amounts have been earned and collectability from the vendor is reasonably assured. Corporate-owned stores revenue The following revenues are generated from stores owned and operated by the Company. Membership dues revenue Customers are offered multiple membership choices varying in length. Membership dues are earned and recognized over the membership term on a straight-line basis. Enrollment fee revenue Enrollment fees are charged to new members at the commencement of their membership. The Company recognizes enrollment fees ratably over the estimated duration of the membership life, which is generally two years. Annual membership fee revenue Annual membership fees are annual fees charged to members in addition to and in order to maintain low monthly membership dues. The Company recognizes annual membership fees ratably over the 12-month membership period. Retail sales The Company sells Planet Fitness branded apparel, food, beverages, and other accessories. The revenue for these items is recognized at the point of sale. Equipment revenue The Company sells and delivers equipment purchased from third-party equipment manufacturers to U.S. based franchisee-owned stores. Equipment revenue is recognized upon the equipment being delivered to and assembled at each store and accepted by the franchisee. Franchisees are charged for all freight costs incurred for the delivery of equipment. Freight revenue is recorded within equipment revenue and freight costs are recorded within cost of revenue. The Company recognizes revenue on a gross basis in these transactions as management has determined the Company to be the principal in these transactions. Management determined the Company to be the principal because the Company is the primary obligor in these transactions, the Company has latitude in establishing prices for the equipment sales to franchisees, the Company has supplier selection discretion and is involved in determination of product specifications, and the Company bears all credit risk associated with obligations to the equipment manufacturers. Equipment deposits are recognized as a liability on the accompanying consolidated balance sheets until delivery, assembly (if required), and acceptance by the franchisee. As of December 31, 2016 and 2015, equipment deposits were $2,170 and $5,587, respectively. Sales tax All revenue amounts are recorded net of applicable sales tax. (f) Deferred revenue Deferred revenue represents cash received from franchisees for ADAs and franchise fees for which revenue recognition criteria has not yet been met and cash received from members for enrollment fees, membership dues and annual fees for the portion not yet earned based on the membership period. (g) Cost of revenue Cost of revenue consists of direct costs associated with equipment sales (including freight costs), the cost of retail merchandise sold in corporate-owned stores, and prior to 2016 also included direct costs related to the maintenance and support of the Company’s proprietary system-wide point-of-sale system. Costs related to the point-of-sale system were $0, $1,236, and $3,385 for the years ended December 31, 2016, 2015 and 2014 respectively. Costs related to retail merchandise sales were immaterial in all periods presented. Rebates from equipment vendors where the Company has recognized the related equipment revenue and costs are recorded as a reduction to the cost of revenue. (h) Store operations Store operations consists of the direct costs related to operating corporate-owned stores, including our store management and staff, rent expense, utilities, supplies, maintenance, and local advertising. (i) Selling, general and administrative Selling, general and administrative expenses consist of costs associated with administrative and franchisee support functions related to our existing business as well as growth and development activities. These costs primarily consist of payroll, IT related, marketing, legal and accounting expenses. These expenses include costs related to placement services of $3,974, $3,452, and $2,743, for the years ended December 31, 2016, 2015 and 2014, respectively. (j) Accounts receivable Accounts receivable is primarily comprised of amounts owed to the Company resulting from equipment, placement, and commission revenue. The Company evaluates its accounts receivable on an ongoing basis and may establish an allowance for doubtful accounts based on collections and current credit conditions. Accounts are written off as uncollectible when it is determined that further collection efforts will be unsuccessful. Historically, the Company has not had a significant amount of write-offs. (k) Leases and asset retirement obligations The Company recognizes rent expense related to leased office and operating space on a straight-line basis over the term of the lease. The difference between rent expense and rent paid, if any, as a result of escalation provisions and lease incentives, such as tenant improvements provided by lessors, and is recorded as deferred rent in the Company’s consolidated balance sheets. In accordance with ASC Topic 410, Asset Retirement and Environmental Obligations (l) Property and equipment Property and equipment is recorded at cost and depreciated using the straight-line method over its related estimated useful life. Leasehold improvements are amortized over the shorter of the lease term or the estimated useful life of the related asset, whichever is shorter. Upon sale or retirement, the asset cost and related accumulated depreciation are removed from the respective accounts, and any related gain or loss is reflected in the consolidated statements of operations. Ordinary maintenance and repair costs are expensed as incurred. The estimated useful lives of the Company’s fixed assets by class of asset are as follows: Years Buildings and building improvements 20–40 Computers and equipment 3 Furniture and fixtures 5 Leasehold improvements Useful life or term of lease whichever is shorter Fitness equipment 5–7 Vehicles 5 (m) Advertising expenses The Company expenses advertising costs as incurred. Advertising expenses, net of amounts reimbursed by franchisees, are included within store operations and selling, general and administrative expenses and totaled $8,270, $9,349, and $7,272 for the years ended December 31, 2016, 2015 and 2014, respectively. See Note 5 for discussion of the national advertising fund. (n) Goodwill, long-lived assets, and other intangible assets Goodwill and other intangible assets that arise from acquisitions are recorded in accordance with ASC Topic 350, Intangibles—Goodwill and Other Goodwill and indefinite-lived intangible assets are not amortized, but are reviewed annually for impairment or more frequently if impairment indicators arise. Separable intangible assets that are not deemed to have an indefinite life are amortized over their estimated useful lives on either a straight-line or accelerated basis as deemed appropriate, and are reviewed for impairment when events or circumstances suggest that the assets may not be recoverable. The Company performs its annual test for impairment of goodwill and indefinite lived intangible assets on December 31 of each year. For goodwill, the first step of the impairment test is to determine whether the carrying amount of a reporting unit exceeds the fair value of the reporting unit. If the carrying amount of the reporting unit exceeds the reporting unit’s fair value, the Company would be required to perform a second step of the impairment test as this is an indication that the reporting unit’s goodwill may be impaired. The second step compares the implied fair value of the reporting unit’s goodwill with the carrying amount of that goodwill. Any impairment loss would be recognized in an amount equal to the excess of the carrying value of the goodwill over the implied fair value of the goodwill. The Company is also permitted to make a qualitative assessment of whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount before applying the two-step goodwill impairment test. If the Company concludes it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, it need not perform the two-step impairment test. For indefinite lived intangible assets, the impairment assessment consists of comparing the carrying value of the asset to its estimated fair value. To the extent that the carrying value exceeds the fair value of the asset, an impairment is recorded to reduce the carrying value to its fair value. The Company is also permitted to make a qualitative assessment of whether it is more likely than not an indefinite lived intangible asset’s fair value is less than its carrying value prior to applying the quantitative assessment. If based on the Company’s qualitative assessment it is not more likely than not that the carrying value of the asset is less than its fair value, then a quantitative assessment is not required. The Company determined that no impairment charges were required during any periods presented. The Company applies the provisions of ASC Topic 360, Property, Plant and Equipment (o) Income taxes The Company accounts for income taxes using the asset and liability method. Deferred income taxes are recognized for the expected future tax consequences attributable to temporary differences between the carrying amount of the existing tax assets and liabilities and their respective tax basis. Deferred tax assets and liabilities are measured using enacted tax rates expected to be applied in the years in which temporary differences are expected to be recovered or settled. The principal items giving rise to temporary differences are the use of accelerated depreciation and certain basis differences resulting from acquisitions and the recapitalization transactions. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. As a result of the recapitalization transactions, Planet Fitness, Inc. became the sole managing member of Pla-Fit Holdings, which is treated as a partnership for U.S. federal and most applicable state and local income tax purposes. As a partnership, Pla-Fit Holdings is not subject to U.S. federal and certain state and local income taxes. Any taxable income or loss generated by Pla-Fit Holdings is passed through to and included in the taxable income or loss of its members, including Planet Fitness, Inc. following the recapitalization transactions, on a pro rata basis. Planet Fitness, Inc. is subject to U.S. federal income taxes, in addition to state and local income taxes with respect to our allocable share of any taxable income of Pla-Fit Holdings following the recapitalization transactions. The Company is also subject to taxes in foreign jurisdictions. The Company recognizes the effect of income tax positions only if those positions are more likely than not to be sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs (see Note 15). (p) Tax benefit arrangements The Company’s acquisition of Holdings Units in connection with the IPO and future and certain past exchanges of Holdings Units for shares of the Company’s Class A common stock (or cash at the option of the Company) are expected to produce and have produced favorable tax attributes. In connection with the IPO, the Company entered into two tax receivable agreements. Under the first of those agreements, the Company generally is required to pay to certain existing and previous equity owners of Pla-Fit Holdings, LLC who are unaffiliated with TSG (the “TRA Holders”) 85% of the applicable tax savings, if any, in U.S. federal and state income tax that the Company is deemed to realize as a result of certain tax attributes of their Holdings Units sold to the Company (or exchanged in a taxable sale) and that are created as a result of (i) the sales of their Holdings Units for shares of Class A common stock and (ii) tax benefits attributable to payments made under the tax receivable agreement (including imputed interest). Under the second tax receivable agreement, the Company generally is required to pay to the Direct TSG Investors 85% of the amount of tax savings, if any, that the Company is deemed to realize as a result of the tax attributes of the Holdings Units held in respect of the Direct TSG Investors’ interest in the Company, which resulted from the Direct TSG Investors’ purchase of interests in Pla-Fit Holdings in 2012, and certain other tax benefits. Under both agreements, the Company generally retains the benefit of the remaining 15% of the applicable tax savings. Also, pursuant to the exchange agreement, to the extent an exchange results in Pla-Fit Holdings, LLC incurring a current tax liability relating to the New Hampshire business profits tax, the TRA Holders have agreed that they will contribute to Pla-Fit Holdings, LLC an amount sufficient to pay such tax liability (up to 3.5% of the value received upon exchange). If and when the Company subsequently realizes a related tax benefit, Pla-Fit Holdings, LLC will distribute the amount of any such tax benefit to the relevant Continuing LLC Owner in respect of its contribution. Due to changes in New Hampshire tax law, the Company no longer expects to incur any such liability under the New Hampshire business profits tax. Based on current projections, the Company anticipates having sufficient taxable income to utilize these tax attributes and receive corresponding tax deductions in future periods. Accordingly, as of December 31, 2016 the Company has recorded a liability of $419,071 payable to the Direct TSG Investors and TRA Holders under the tax benefit obligations, representing approximately 85% of the calculated tax savings based on the original basis adjustments the Company anticipates being able to utilize in future years. Changes in the projected liability resulting from these tax benefit arrangements may occur based on changes in anticipated future taxable income, changes in applicable tax rates or other changes in tax attributes that may occur and impact the expected future tax benefits to be received by the Company. Changes in the projected liability under these tax benefit arrangements will be recorded as a component of other income (expense) each period. The projection of future taxable income involves significant judgment. Actual taxable income may differ from estimates, which could significantly impact the liability under the tax benefit arrangements and the Company’s consolidated results of operations. (q) Fair value ASC 820, Fair Value Measurements and Disclosures Level 1—Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets. Level 2—Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. Level 3—Inputs to the valuation methodology are unobservable and significant to the fair value measurement. The table below presents information about the Company’s assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2016 and December 31, 2015: Quoted Significant Total fair prices other Significant value at in active observable unobservable December 31, markets inputs inputs 2016 (Level 1) (Level 2) (Level 3) Interest rate caps $ 306 $ — $ 306 $ — Quoted Significant Total fair prices other Significant value at in active observable unobservable December 31, markets inputs inputs 2015 (Level 1) (Level 2) (Level 3) Interest rate caps $ 1,147 $ — $ 1,147 $ — (r) Financial instruments The carrying values of cash and cash equivalents, accounts receivable and accounts payable approximate fair value because of the short-term nature of these instruments. The carrying value of debt also approximates fair value as it is variable rate debt. The Company has determined that the determination of fair value of amounts due from related parties under long-term arrangements is impracticable given the related-party nature of these agreements. (s) Derivative instruments and hedging activities The Company recognizes all derivative instruments as either assets or liabilities in the balance sheet at their respective fair values. For derivatives designated in hedging relationships, changes in the fair value are either offset through earnings against the change in fair value of the hedged item attributable to the risk being hedged or recognized in accumulated other comprehensive income, to the extent the derivative is effective at offsetting the changes in cash flows being hedged until the hedged item affects earnings. The Company only enters into derivative contracts that it intends to designate as a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (cash flow hedge). For all hedging relationships, the Company formally documents the hedging relationship and its risk-management objective and strategy for undertaking the hedge, the hedging instrument, the hedged transaction, the nature of the risk being hedged, how the hedging instrument’s effectiveness in offsetting the hedged risk will be assessed prospectively and retrospectively, and a description of the method used to measure ineffectiveness. The Company also formally assesses, both at the inception of the hedging relationship and on an ongoing basis, whether the derivatives that are used in hedging relationships are highly effective in offsetting changes in cash flows of hedged transactions. For derivative instruments that are designated and qualify as part of a cash flow hedging relationship, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings. The Company discontinues hedge accounting prospectively when it determines that the derivative is no longer effective in offsetting cash flows attributable to the hedged risk, the derivative expires or is sold, terminated, or exercised, the cash flow hedge is de-designated because a forecasted transaction is not probable of occurring, or management determines to remove the designation of the cash flow hedge. In all situations in which hedge accounting is discontinued and the derivative remains outstanding, the Company continues to carry the derivative at its fair value on the balance sheet and recognizes any subsequent changes in its fair value in earnings. When it is probable that a forecasted transaction will not occur, the Company discontinues hedge accounting and recognizes immediately in earnings gains and losses that were accumulated in other comprehensive income related to the hedging relationship. See Note 9 for further information. (t) Equity-based compensation The Company has an equity-based compensation plan under which it receives services from employees as consideration for equity instruments of the Company. The compensation expense is determined based on the fair value of the award as of the grant date. Compensation expense is recognized over the vesting period, which is the period over which all of the specified vesting conditions are satisfied. For awards with graded vesting, the fair value of each tranche is recognized over its respective vesting period. See Note 13 for further information. (u) Guarantees The Company, as a guarantor, is required to recognize, at inception of the guaranty, a liability for the fair value of the obligation undertaken in issuing the guarantee. See Notes 3 and 16 for further discussion of such obligations guaranteed. (v) Contingencies The Company records estimated future losses related to contingencies when such amounts are probable and estimable. The Company includes estimated legal fees related to such contingencies as part of the accrual for estimated future losses. (w) Reclassifications Certain amounts have been reclassified to conform to current year presentation. (x) Recent accounting pronouncements The FASB issued ASU No. 2015-02, Income Statement—Consolidation, The FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, The FASB issued ASU No. 2015-05: Intangibles - Goodwill and Other - Internal-Use Software: Customer's Accounting for Fees Paid in a Cloud Computing Arrangement In September 2015, the FASB issued Accounting Standards Update No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments The FASB issued ASU No. 2016-02, Leases The FASB issued ASU No. 2016-09, Stock Compensation The FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments

Variable interest entities

Variable interest entities	12 Months Ended
	Dec. 31, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Variable interest entities	(3) Variable interest entities The carrying values of VIEs included in the consolidated financial statements as of December 31, 2016 and December 31, 2015 are as follows: December 31, 2016 December 31, 2015 Assets Liabilities Assets Liabilities PF Melville $ 4,071 $ — $ 3,728 $ — MMR $ 3,156 — $ 2,953 — Total $ 7,227 $ — $ 6,681 $ — The Company also has variable interests in certain franchisees mainly through the guarantee of certain debt and lease agreements as well as financing provided by the Company and by certain related parties to franchisees. The Company’s maximum obligation, as a result of its guarantees of leases and debt, is approximately $1,350 and $1,871 as of December 31, 2016 and 2015, respectively. The amount of the Company’s maximum obligation represents a loss that the Company could incur from the variability in credit exposure without consideration of possible recoveries through insurance or other means. In addition, the amount bears no relation to the ultimate settlement anticipated to be incurred from the Company’s involvement with these entities, which is estimated at $0.

Acquisition

Acquisition	12 Months Ended
	Dec. 31, 2016
Business Combinations [Abstract]
Acquisition	(4) Acquisition On March 31, 2014, the Company purchased certain assets from one of its franchisees, including eight franchisee-owned stores in New York, for consideration of $42,931, including a cash payment of $39,931 and a $3,000 discount to be applied to future equipment purchases. The $3,000 equipment discount was initially recorded as deferred revenue by the Company and is being recognized as equipment sales are made by the Company to the franchisee (see Note 10). In addition, as a result of the transaction, the Company incurred a loss on unfavorable reacquired franchise rights of $1,293, which has been reflected in other operating costs in the statement of operations. The loss incurred reduced the net purchase price to $41,638. The Company financed the purchase through borrowings under its credit facility.

National advertising fund

National advertising fund	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
National advertising fund	(5) National advertising fund On July 26, 2011, the Company established Planet Fitness NAF, LLC (“NAF”) for the creation and development of marketing, advertising, and related programs and materials for all Planet Fitness stores located in the United States and Puerto Rico. On behalf of the NAF, the Company collects 2% of gross monthly membership billings from franchisees, in accordance with the provisions of the franchise agreements. The Company also contributes 2% of monthly membership billings from stores owned by the Company to the NAF. The use of amounts received by NAF is restricted to advertising, product development, public relations, merchandising, and administrative expenses and programs to increase sales and further enhance the public reputation of the Planet Fitness brand. The Company consolidates and reports all assets and liabilities held by the NAF within the consolidated financial statements. Amounts received or receivable by NAF are reported as restricted assets and restricted liabilities within current assets and current liabilities on the consolidated balance sheets. The Company provides administrative services to NAF and charges NAF a fee for providing those services. These services include accounting services, information technology, data processing, product development, legal and administrative support, and other operating expenses, which amounted $1,700, $1,340 and $1,010 for the years ended December 31, 2016, 2015 and 2014, respectively. The fees paid to the Company by NAF are included in the consolidated statements of operations as a reduction in general and administrative expense, where the expense incurred by the Company was initially recorded.

Property and equipment

Property and equipment	12 Months Ended
	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Property and equipment	(6) Property and equipment Property and equipment as of December 31, 2016 and 2015 consists of the following: December 31, 2016 December 31, 2015 Land $ 910 $ 910 Equipment 27,283 27,391 Leasehold improvements 41,249 38,288 Buildings and improvements 5,107 5,107 Furniture & fixtures 3,708 3,030 Other 5,673 2,947 Construction in progress 8,295 1,991 92,225 79,664 Accumulated Depreciation (30,987 ) (23,525 ) Total $ 61,238 $ 56,139 The Company recorded depreciation expense of $12,131, $11,088, and $9,138 for the years ended December 31, 2016, 2015 and 2014, respectively.

Goodwill and intangible assets

Goodwill and intangible assets	12 Months Ended
	Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill and intangible assets	(7) Goodwill and intangible assets A summary of goodwill and intangible assets at December 31, 2016 and 2015 is as follows: Weighted average Gross amortization carrying Accumulated Net carrying December 31, 2016 period (years) amount amortization Amount Customer relationships 11.1 $ 171,782 (72,655 ) $ 99,127 Noncompete agreements 5.0 14,500 (12,027 ) 2,473 Favorable leases 7.5 2,935 (1,643 ) 1,292 Order backlog 0.4 3,400 (3,400 ) — Reacquired franchise rights 5.8 8,950 (4,280 ) 4,670 201,567 (94,005 ) 107,562 Indefinite-lived intangible: Trade and brand names N/A 146,300 — 146,300 Total intangible assets $ 347,867 $ (94,005 ) $ 253,862 Goodwill $ 176,981 $ — $ 176,981 Weighted average Gross amortization carrying Accumulated Net carrying December 31, 2015 period (years) amount amortization Amount Customer relationships 11.1 $ 171,782 (57,741 ) $ 114,041 Noncompete agreements 5.0 14,500 (9,127 ) 5,373 Favorable leases 7.5 2,935 (1,256 ) 1,679 Order backlog 0.4 3,400 (3,400 ) — Reacquired franchise rights 5.8 8,950 (2,724 ) 6,226 201,567 (74,248 ) 127,319 Indefinite-lived intangible: Trade and brand names N/A 146,300 — 146,300 Total intangible assets $ 347,867 $ (74,248 ) $ 273,619 Goodwill $ 176,981 $ — $ 176,981 There were no changes in the carrying amount of goodwill during the years ended December 31, 2016 or 2015. The Company determined that no impairment charges were required during any periods presented. Amortization expense related to the intangible assets totaled $19,757, $21,543, and $23,698 for the years ended December 31, 2016, 2015 and 2014, respectively. Included within these total amortization expense amounts are $386, $473, and $495 related to amortization of favorable and unfavorable leases for the years ended December 31, 2016, 2015 and 2014, respectively. Amortization of favorable and unfavorable leases is recorded within store operations as a component of rent expense in the consolidated statements of operations. The anticipated annual amortization expense to be recognized in future years as of December 31, 2016 is as follows: Amount 2017 $ 18,215 2018 14,583 2019 14,215 2020 12,517 2021 12,422 Thereafter 35,610 Total $ 107,562

Long-term debt

Long-term debt	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Long-term debt	(8) Long-term debt Long-term debt as of December 31, 2016 and 2015 consists of the following: December 31, 2016 December 31, 2015 Term loan B requires quarterly installments plus interest through the term of the loan, maturing March 31, 2021. Outstanding borrowings bear interest at LIBOR or base rate (as defined) plus a margin at the election of the borrower (4.33% at December 31, 2016 and 4.75% at December 31, 2015) $ 716,654 $ 492,275 Revolving credit line, requires interest only payments through the term of the loan, maturing March 31, 2019. Outstanding borrowings bear interest at LIBOR or base rate (as defined) plus a margin at the election of the borrower (6.00% at December 31, 2016 and 5.50% at December 31, 2015) — — Total debt, excluding deferred financing costs 716,654 492,275 Deferred financing costs, net of accumulated amortization (7,466 ) (7,396 ) Total debt 709,188 484,879 Current portion of long-term debt and line of credit 7,185 5,100 Long-term debt, net of current portion $ 702,003 $ 479,779 On March 31, 2014, the Company entered into a five-year $430,000 credit facility with a consortium of banks and lenders to refinance its existing indebtedness, as well as to provide funds for working capital, capital expenditures, acquisitions, a $173,900 dividend and general corporate purposes. The facility consisted of a $390,000 Term Loan and a $40,000 Revolving Credit Facility. On March 31, 2015, the Company amended this credit facility to increase the Term Loan to $510,000 to fund a cash dividend of $140,000. On November 10, 2016, the Company amended the credit facility to increase the Revolving Credit Facility to $75,000, reduce the interest rate margin for term loan borrowings by 25 basis points, and increase the Term Loan to $718,450 primarily in order to fund a cash dividend and other equivalent payments totaling $271,011. In connection with the amendment, during the year ended December 31, 2016, the Company capitalized and deferred financing costs of $2,219, recorded expense of $3,001 related to certain third party fees included in other expense on the consolidated statement of operations, and a loss on extinguishment of debt of $606 included in interest expense on the consolidated statement of operations. The unused portion of the Revolving Credit Facility as of December 31, 2016 was $75,000. The Term Loan calls for quarterly principal installment payments of $1,796 through March 2021. The credit facility requires the Company to meet certain financial covenants, which the Company was in compliance with as of December 31, 2016. The facility is secured by all of the Company’s assets, excluding the assets attributable to the consolidated VIEs (see Note 3). Future annual principal payments of long-term debt as of December 31, 2016 are as follows: Amount 2017 $ 7,185 2018 7,185 2019 7,185 2020 7,185 2021 687,914 Thereafter - Total $ 716,654

Derivative instruments and hedg

Derivative instruments and hedging activities	12 Months Ended
	Dec. 31, 2016
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative instruments and hedging activities	(9) Derivative instruments and hedging activities The Company utilizes interest-rate-related derivative instruments to manage its exposure related to changes in interest rates on its variable-rate debt instruments. The Company does not enter into derivative instruments for any purpose other than cash flow hedging. The Company does not speculate using derivative instruments. By using derivative financial instruments to hedge exposures to changes in interest rates, the Company exposes itself to credit risk and market risk. Credit risk is the failure of the counterparty to perform under the terms of the derivative contract. When the fair value of a derivative contract is an asset, the counterparty owes the Company, which creates credit risk for the Company. When the fair value of a derivative contract is a liability, the Company owes the counterparty and, therefore, the Company is not exposed to the counterparty’s credit risk in those circumstances. The Company minimizes counterparty credit risk in derivative instruments by entering into transactions with high-quality counterparties whose credit rating is higher than A1/A+ at the inception of the derivative transaction. The derivative instruments entered into by the Company do not contain credit-risk-related contingent features. Market risk is the adverse effect on the value of a derivative instrument that results from a change in interest rates. The market risk associated with interest-rate contracts is managed by establishing and monitoring parameters that limit the types and degree of market risk that may be undertaken. The Company assesses interest rate risk by continually identifying and monitoring changes in interest rate exposures that may adversely impact expected future cash flows and by evaluating hedging opportunities. The Company monitors interest rate risk attributable to both the Company’s outstanding or forecasted debt obligations as well as the Company’s offsetting hedge positions. During 2014, the Company utilized LIBOR-based interest rate swap agreements that were entered into to manage fluctuations in cash flows resulting from changes in the benchmark interest rate of LIBOR. It was determined on March 31, 2014 that the hedge was ineffective and expense of $92 was reclassified from other comprehensive income to interest expense. The interest rate swaps were all terminated by September 2014. The Company recorded a loss of $248 within interest expense in the consolidated statement of operations for the year ending December 31, 2014 related to these terminated swap agreements. In September 2014, the Company entered into a series of LIBOR based interest rate cap agreements in exchange for premium payments of $2,373 to effectively manage interest rate risk above a certain threshold and mitigate exposure to changes in interest rates under the term loan. The interest rate caps entered into in September 2014 were for a total notional amount of $194,000. The term of the interest rate caps began on September 30, 2014 and ends on September 29, 2017. In September 2015, the Company entered into two additional caps for premium payments of $880, which were effective September 30, 2015 and end on September 30, 2018. The interest rate cap agreements are designed to cap the LIBOR interest rate into a fixed interest rate if the LIBOR goes above the set cap amounts of 1.5%. As of December 31, 2016, the Company had interest rate cap agreements with notional amounts of $194,000 outstanding. Changes in the fair value of interest rate swaps and caps designated as hedging instruments that effectively offset the variability of cash flows associated with variable-rate, long-term debt obligations are reported in accumulated other comprehensive income. These amounts subsequently are reclassified into interest expense as a yield adjustment of the hedged interest payments in the same period in which the related interest affects earnings. The interest rate cap balances of $306 and $1,147 were recorded within other assets in the consolidated balance sheets as of December 31, 2016 and 2015, respectively. These amounts have been measured at fair value and are considered to be a Level 2 fair value measurement. The Company recorded a reduction to the value of its interest rate caps of $78, $1,388, and $662, within other comprehensive loss during the years ended December 31, 2016, 2015 and 2014, respectively. The amount of related income tax was not material in any of the periods presented. As of December 31, 2016, the Company does not expect to reclassify any amounts included in accumulated other comprehensive income (loss) into earnings during the next 12 months. Transactions and events expected to occur over the next twelve months that will necessitate reclassifying these derivatives’ loss to earnings include the re-pricing of variable-rate debt.

Deferred revenue

Deferred revenue	12 Months Ended
	Dec. 31, 2016
Deferred Revenue Disclosure [Abstract]
Deferred revenue	(10) Deferred revenue The summary set forth below represents the balances in deferred revenue as of December 31, 2016 and 2015: December 31, 2016 December 31, 2015 Prepaid membership fees $ 5,034 $ 5,134 Enrollment fees 1,240 1,555 Equipment discount 2,796 2,968 Annual membership fees 6,775 6,132 Area development and franchise fees 10,286 10,944 Total deferred revenue 26,131 26,733 Long-term portion of deferred revenue 8,351 12,016 Current portion of deferred revenue $ 17,780 $ 14,717 Equipment deposits received in advance of delivery, placement and customer acceptance as of December 31, 2016 and 2015 were $2,170 and $5,587, respectively and are expected to be recognized as revenue in the next twelve months. In December 2016, the Company wrote-off $1,754 of expiring equipment discounts that were originally recorded in connection with the March 31, 2014 acquisition of eight franchisee-owned stores. This amount is included as a gain in other expense on the consolidated statement of operations for the year ended December 31, 2016.

Related party transactions

Related party transactions	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
Related party transactions	(11) Related party transactions Amounts due from related parties of $2,864 and $4,940 as of December 31, 2016 and 2015, respectively, primarily relate to currently due or potential reimbursements for certain taxes accrued or paid by the Company (see note 15). Activity with franchisees considered to be related parties is summarized below. For the Year Ended December 31, 2016 2015 2014 Franchise revenue $ 1,760 $ 1,232 $ 733 Equipment revenue 1,338 1,686 3,711 Total revenue from related parties $ 3,098 $ 2,918 $ 4,444 Additionally, the Company had deferred ADA revenue from related parties of $422 and $352 as of December 31, 2016 and 2015, respectively. The Company paid management fees to TSG totaling $0, $1,899, and $1,211 during the years ended December 31, 2016, 2015 and 2014 December 31, 2016

Stockholder's equity

Stockholder's equity	12 Months Ended
	Dec. 31, 2016
Equity [Abstract]
Stockholder's equity	(12) Stockholder’s equity The recapitalization transactions The Company refers to the Merger, Reclassification and entry into the Exchange agreement, each as described below, as the “recapitalization transactions.” The Merger was effected pursuant to a merger agreement by and among the Company and Planet Fitness Holdings, L.P. (a predecessor entity to the Company) and the recapitalization transactions were effected pursuant to a recapitalization agreement by and among the Company, Pla-Fit Holdings, the Continuing LLC Owners and Direct TSG Investors. Merger Prior to the Merger, the Direct TSG Investors held interests in Planet Fitness Holdings, L.P., a predecessor entity to the Company that held indirect interests in Pla-Fit Holdings. Planet Fitness Holdings, L.P. was formed in October 2014 and had no material assets, liabilities or operations, other than as a holding company owning indirect interests in Pla-Fit Holdings. The Direct TSG Investors consist of investment funds affiliated with TSG. Pursuant to a merger agreement dated June 22, 2015, upon the pricing of the IPO, Planet Fitness Holdings, L.P. merged with and into the Company, and the interests in Planet Fitness Holdings, L.P. held by the Direct TSG Investors were converted into 26,106,930 shares of Class A common stock of the Company. The Company refers to this as the “Merger.” All shares of Class A common stock have both voting and economic rights in Planet Fitness, Inc. The Merger was effected on August 5, 2015, prior to the time our Class A common stock was registered under the Exchange Act and prior to the completion of the IPO. Reclassification The equity interests of Pla-Fit Holdings previously consisted of three different classes of limited liability company units (Class M, Class T and Class O). Prior to the completion of the IPO, the limited liability company agreement of Pla-Fit Holdings was amended and restated to, among other things, modify its capital structure to create a single new class of units, the Holdings Units. The Company refers to this capital structure modification as the “Reclassification.” The Direct TSG Investors’ indirect interest in Pla-Fit Holdings was held through Planet Fitness Holdings, L.P. As a result, following the Merger, in which Planet Fitness Holdings, L.P. merged with and into the Company, the Direct TSG Investors’ indirect interests in Pla-Fit Holdings are held through the Company. Therefore, the Holdings Units received in the Reclassification were allocated to: (1) the Continuing LLC Owners based on their existing interests in Pla-Fit Holdings; and (2) the Company to the extent of the Direct TSG Investors’ indirect interest in Pla-Fit Holdings. The number of Holdings Units allocated to the Company in the Reclassification was equal to the number of shares of Class A common stock that the Direct TSG Investors received in the Merger (on a one-for-one basis). The Reclassification was effected on August 5, 2015, prior to the time our Class A common stock was registered under the Exchange Act and prior to the completion of the IPO. Following the Merger and the Reclassification, the Company issued to Continuing LLC Owners 72,602,810 shares of Class B common stock, one share of Class B common stock for each Holdings Unit they held. The shares of Class B common stock have no rights to dividends or distributions, whether in cash or stock, but entitle the holder to one vote per share on matters presented to stockholders of the Company. The Continuing LLC Owners consist of investment funds affiliated with TSG and certain employees and directors. Pursuant to the LLC agreement that went into effect at the time of the Reclassification (“New LLC Agreement”), the Company was designated as the sole managing member of Pla-Fit Holdings. Accordingly, the Company has the right to determine when distributions will be made by Pla-Fit Holdings to its members and the amount of any such distributions (subject to the requirements with respect to the tax distributions described below). If the Company authorizes a distribution by Pla-Fit Holdings, the distribution will be made to the members of Pla-Fit Holdings, including the Company, pro rata in accordance with the percentages of their respective Holdings Units. The holders of Holdings Units will incur U.S. federal, state and local income taxes on their allocable share of any taxable income of Pla-Fit Holdings (as calculated pursuant to the New LLC Agreement). Net profits and net losses of Pla-Fit Holdings will generally be allocated to its members pursuant to the New LLC Agreement pro rata in accordance with the percentages of their respective Holdings Units. The New LLC Agreement provides for cash distributions to the holders of Holdings Units for purposes of funding their tax obligations in respect of the income of Pla-Fit Holdings that is allocated to them, to the extent other distributions from Pla-Fit Holdings for the relevant year have been insufficient to cover such liability. Generally, these tax distributions are computed based on the estimated taxable income of Pla-Fit Holdings allocable to the holders of Holdings Units multiplied by an assumed, combined tax rate equal to the maximum rate applicable to an individual or corporation resident in San Francisco, California (taking into account the non-deductibility of certain expenses and the character of the Company’s income). Exchange agreement Following the Merger and the Reclassification, the Company and the Continuing LLC Owners entered into an exchange agreement under which the Continuing LLC Owners (or certain permitted transferees thereof) have the right, from time to time and subject to the terms of the exchange agreement, to exchange their Holdings Units, along with a corresponding number of shares of Class B common stock, for shares of Class A common stock (or cash at the option of the Company) on a one-for-one basis, subject to customary conversion rate adjustments for stock splits, stock dividends, reclassifications and similar transactions. As a Continuing LLC Owner exchanges Holdings Units, along with a corresponding number of shares of Class B common stock, for shares of Class A common stock, the number of Holdings Units held by the Company will increase by a corresponding amount as it acquires the exchanged Holdings Units and cancels a corresponding number of shares of Class B common stock. IPO transactions In connection with the completion of the IPO on August 11, 2015, in order to facilitate the disposition of equity interests in Pla-Fit Holdings held by Continuing LLC Owners affiliated with TSG, the Company used the net proceeds received to purchase issued and outstanding Holdings Units from these Continuing LLC Owners that they received in the Reclassification. In connection with the IPO, the Company purchased 10,491,055 issued and outstanding Holdings Units from these Continuing LLC Owners for an aggregate of $156,946. This is in addition to the 26,106,930 Holdings Units that the Company acquired in the Reclassification on a one-for-one basis in relation to the number of shares of Class A common stock issued to the Direct TSG Investors in the Merger. Accordingly, following the IPO, the Company held 36,597,985 Holdings Units, which is equal to the number of shares of Class A common stock that were issued to the Direct TSG Investors and investors in the IPO. The Direct TSG Investors, who did not receive Holdings Units in the Reclassification but received shares of Class A common stock in the Merger, sold 5,033,945 shares of Class A common stock in the IPO as selling stockholders. All expenses of the IPO, other than underwriter discounts and commissions, were borne by Pla-Fit Holdings or reimbursed by Pla-Fit Holdings to the Company and amounted to $7,697 for the year ended December 31, 2015. These amounts were recorded in selling, general, and administrative expense in the accompanying statements of operations and could not be capitalized and offset against the proceeds from the offering because the Company did not retain any of the proceeds from the IPO. June Secondary Offering As described in Note 1, on June 28, 2016 the Company completed the June Secondary Offering of 11,500,000 shares of our Class A common stock at a price of $16.50 per share. All of the shares sold in the offering were offered by Direct TSG Investors and the participating Continuing LLC Owners. The Company did not receive any proceeds from the sale of shares of Class A common stock offered by the Direct TSG Investors and the participating Continuing LLC Owners. The shares sold in the offering consisted of (i) 3,608,840 existing shares of Class A common stock held by the Direct TSG Investors and (ii) 7,891,160 newly-issued shares of Class A common stock issued in connection with the exercise of the exchange right by the Continuing LLC Owners that participated in the June Secondary Offering. Simultaneously, and in connection with the exchange, 7,891,160 shares of Class B common stock were surrendered by the Continuing LLC Owners that participated in the June Secondary Offering and canceled. Additionally, in connection with the exchange, Planet Fitness, Inc. received 7,891,160 Holdings Units, increasing its total ownership interest in Pla-Fit Holdings. September Secondary Offering As described in Note 1, on September 28, 2016, the Company completed the September Secondary Offering of 8,000,000 shares of our Class A common stock at a price of 19.62 per share. All of the shares sold in the offering were offered by the Direct TSG Investors and participating Continuing LLC Owners. The Company did not receive any proceeds from the sale of shares of Class A common stock offered by the Direct TSG Investors and the participating Continuing LLC Owners. The shares sold in the offering consisted of (i) 2,593,981 existing shares of Class A common stock held by the Direct TSG Investors and (ii) 5,406,019 newly-issued shares of Class A common stock issued in connection with the exercise of the exchange right by the Continuing LLC Owners that participated in the September Secondary Offering. Simultaneously, and in connection with the exchange, 5,406,019 shares of Class B common stock were surrendered by the Continuing LLC Owners that participated in the September Secondary Offering and canceled. Additionally, in connection with the exchange, Planet Fitness, Inc. received 5,406,019 Holdings Units, increasing its total ownership interest in Pla-Fit Holdings. November Secondary Offering As described in Note 1, on November 22, 2016, the Company completed the November Secondary Offering of 15,000,000 shares of our Class A common stock at a price of $23.22 per share. All of the shares sold in the offering were offered by the Direct TSG Investors and participating Continuing LLC Owners. The Company did not receive any proceeds from the sale of shares of Class A common stock offered by the Direct TSG Investors and the participating Continuing LLC Owners. The shares sold in the offering consisted of (i) 4,863,715 existing shares of Class A common stock held by the Direct TSG Investors and (ii) 10,136,285 newly-issued shares of Class A common stock issued in connection with the exercise of the exchange right by the Continuing LLC Owners that participated in the November Secondary Offering. Simultaneously, and in connection with the exchange, 10,136,285 shares of Class B common stock were surrendered by the Continuing LLC Owners that participated in the November Secondary Offering and canceled. Additionally, in connection with the exchange, Planet Fitness, Inc. received 10,136,285 Holdings Units, increasing its total ownership interest in Pla-Fit Holdings. Other Exchanges In addition to the secondary offerings mentioned above, during the year ended December 31, 2016, certain Continuing LLC Owners have exercised their exchange right and exchanged 1,271,146 Holdings Units for 1,271,146 newly-issued shares of Class A common stock. Simultaneously, and in connection with these exchanges, 1,271,146 shares of Class B common stock were surrendered by the Continuing LLC Owners that exercised their exchange right and cancelled. Additionally, in connection with these exchanges, Planet Fitness, Inc. received 1,271,146 Holdings Units, increasing its total ownership in Pla-Fit Holdings. Future exchanges of Holdings Units by the Continuing LLC Owners will result in a change in ownership and reduce the amount recorded as non-controlling interest and increase additional paid-in capital on our consolidated balance sheets. As a result of the recapitalization transactions, the IPO, completion of our secondary offerings, and other exchanges and equity activity, as of December 31, 2016: • the investors in the IPO, the Company’s secondary offerings, and other exchanges collectively owned 51,307,348 shares of our Class A common, representing 52.1% of the voting power in the Company and, through the Company, 52.1% of the economic interest in Pla-Fit Holdings; • the Direct TSG Investors own 10,006,450 shares of our Class A common stock, representing 10.2% of the voting power in the Company and, through the Company, 10.2% of the economic interest in Pla-Fit Holdings; and • the Continuing LLC Owners collectively hold 37,184,925 Holdings Units, representing 37.7% of the economic interest in Pla-Fit Holdings and 37,184,925 shares of our Class B common stock, representing 37.7% of the voting power in the Company. Dividends Dividends declared and paid to holders of the Company’s Class A common stock during the year ended December 31, 2016, were $169,282, or $2.78 per share of Class A common stock. The dividend was declared on November 10, 2016 and paid on December 5, 2016 to Class A common stock holders of record as of November 22, 2016. The Company also paid cash dividend equivalents of $101,729, or $2.78 per share, to holders of Holdings Units on December 5, 2016 and accrued $3,899 of dividend equivalents for future payment to holders of unvested share awards to be paid upon vesting of the related awards.

Equity-based Compensation

Equity-based Compensation	12 Months Ended
	Dec. 31, 2016
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Equity-based Compensation	(13) Equity-based compensation 2013 Equity Incentive Plan In 2013, the Company’s Board of Directors adopted the 2013 Equity Incentive Plan (the “2013 Plan”). Under the 2013 Plan, the Company granted awards in the form of Class M Units to employees and directors of the Company and its subsidiaries. The Class M Units received distributions (other than tax distributions) only upon a liquidity event, as defined, that exceeded a threshold equivalent to the fair value of the Company, as determined by the Company’s Board of Directors, at the grant date. Eighty percent of the awards vest over five years of continuous employment or service while the other twenty percent only vest in the event of an initial public offering of the Company’s common stock or that of its parent or one of its subsidiaries, subject to the holder of the Class M Units remaining employed or providing services on the date of such initial public offering. All awards include a repurchase option at the election of the Company for the vested portion upon termination of employment or service, and have a ten year contractual term. These awards are accounted for as equity at their fair value as of the grant date. In connection with the IPO and related recapitalization transactions as described in Note 1, all of the outstanding Class M Units were converted into Holdings Units and Class B common shares of Planet Fitness, Inc. in accordance with the terms of the awards. The Company’s IPO constituted a qualifying event under the terms of the awards and as a result 4,238,338 Holdings Units and corresponding Class B Common shares were issued to the existing Class M Unit holders with a weighted-average grant date fair value of $1.52 per share. The Company recorded $784 and $4,371 of compensation expense in the years ended December 31, 2016 and 2015, respectively, related to these awards. The fair value of each award was estimated on the date of grant using a Monte Carlo simulation model. The weighted average assumptions for the grants are provided in the following table. Since the Company’s shares were not publicly traded, expected volatility was estimated based on the average historical volatility of similar entities with publicly traded shares. The term was based on the estimated time to a liquidity event. The risk-free rate for the expected term of the M Unit was based on the U.S. Treasury yield curve at the date of grant. Valuation assumptions: Year ended December 31, 2014 Expected term (years) 1.70 Expected volatility 36.8 % Risk-free interest rate 0.4 % Dividend yield — During the year ended December 31, 2016, the Company modified the vesting terms of 22,527 outstanding Holdings Units such that those units were fully vested immediately. In connection with the modification, the Company recorded $337 of compensation expense in the year ended December 31, 2016. During the year ended December 31, 2015, the Company modified the vesting terms of 10.737 outstanding Class M Units such that those units were fully vested and eligible to receive distributions following a liquidity event. A summary of unvested Holdings Unit activity is presented below: Holdings Units Weighted average grant date fair value Weighted average remaining contractual term (years) Aggregate intrinsic value Unvested outstanding at January 1, 2016 1,805,783 $ 1.52 Units granted — Units forfeited (126,482 ) $ 1.52 Units vested (654,285 ) $ 1.52 Unvested outstanding at December 31, 2016 1,025,016 $ 1.52 1.4 $ 20,603 The amount of total unrecognized compensation cost related to all awards under this plan was $246 as of December 31, 2016, which is expected to be recognized over a weighted-average period of 1.4 years. 2015 Omnibus Incentive Plan Stock Options In August 2015, the Company adopted the 2015 Omnibus Incentive Plan (the "2015 Plan") under which the Company may grant options and other equity-based awards to purchase up to 7,896,800 shares to employees, directors and officers. All stock options awarded vest annually, on a tranche by tranche basis, over a period of four years with a maximum contractual term of 10 years. The fair value of stock option awards granted were determined on the grant date using the Black-Scholes valuation model based on the following assumptions: Year ended December 31, 2016 2015 Expected term (years) (1) 6.25 6.25 Expected volatility (2) 33.2% - 34.4% 35.4 % Risk-free interest rate (3) 1.31% - 1.76% 1.70% - 1.82% Dividend yield (4) — — (1) Expected term represents the estimated period of time until an award is exercised and was determined using the simplified method. (2) Expected volatility is based on the historical volatility of a selected peer group over a period equivalent to the expected term. (3) The risk-free rate is an interpolation of yields on U.S. Treasury securities with maturities equivalent to the expected term. (4) Based on an assumed a dividend yield of zero at the time of grant. A summary of stock option activity for the year ended December 31, 2016: Stock Options Weighted exercise price Weighted average remaining contractual term (years) Aggregate intrinsic value Outstanding at January 1, 2016 108,270 $ 16.15 Granted 309,683 $ 17.90 Exercised (8,483 ) $ 16.00 Forfeited (5,000 ) $ 16.00 Outstanding at December 31, 2016 404,470 $ 17.49 9.2 $ 1,055 Vested or expected to vest at December 31, 2016 392,755 $ 17.47 9.2 $ 1,032 Exercisable at December 31, 2016 17,324 $ 16.23 8.6 $ 67 The weighted-average grant date fair value of stock options granted during the year ended December 31, 2016 was $6.44. During the years ended December 31, 2016 and 2015, $846 and $131, respectively, was recorded to selling, general and administrative expense related to these stock options. As of December 31, 2016, total unrecognized compensation expense related to unvested stock options, including an estimate for pre-vesting forfeitures, was $1,576, which is expected to be recognized over a weighted-average period of 2.1 years. Restricted stock units During the year ended December 31, 2016, the Company granted 2,447 restricted Class A stock units (“RSUs”) to one member of its Board of Directors under the 2015 Plan. The RSUs granted vest on the first anniversary of the grant date, provided that the recipient continues to serve on the Board of Directors through the vesting dates. RSU awards are valued using the intrinsic value method. Stock Options Weighted fair value Weighted average remaining contractual term (years) Aggregate intrinsic value Unvested at January 1, 2016 8,160 $ 18.38 Granted 2,447 $ 20.43 Vested (2,720 ) $ 18.38 Unvested outstanding at December 31, 2016 7,887 $ 19.02 1.0 $ 159 The weighted-average grant date fair value of RSUs granted during the year ended December 31, 2016 was $20.43. During the years ended December 31, 2016 and 2015, $98 and $26, respectively, was recorded to selling, general and administrative expense related to these RSUs. As of December 31, 2016, total unrecognized compensation expense related to unvested RSUs was $76, which is expected to be recognized over a weighted-average period of 1 year.

Earnings per share

Earnings per share	12 Months Ended
	Dec. 31, 2016
Earnings Per Share [Abstract]
Earnings per share	(14) Earnings per share Basic earnings per share of Class A common stock is computed by dividing net income attributable to Planet Fitness, Inc. for the year ended December 31, 2016 and the period from August 6, 2015 through December 31, 2015, the periods following the recapitalization transactions and IPO, by the weighted-average number of shares of Class A common stock outstanding during the same periods. Diluted earnings per share of Class A common stock is computed by dividing net income attributable to Planet Fitness, Inc. by the weighted-average number of shares of Class A common stock outstanding adjusted to give effect to potentially dilutive securities. There were no shares of Class A or Class B common stock outstanding prior to August 6, 2015, therefore no earnings per share information has been presented for any period prior to that date. Shares of the Company’s Class B common stock do not share in the earnings or losses attributable to Planet Fitness, Inc. and are therefore not participating securities. As such, separate presentation of basic and diluted earnings per share of Class B common stock under the two-class method has not been presented. Shares of the Company’s Class B common stock are, however, considered potentially dilutive shares of Class A common stock because shares of Class B common stock, together with the related Holdings Units, are exchangeable into shares of Class A common stock on a one-for-one basis. The following table sets forth reconciliations of the numerators and denominators used to compute basic and diluted earnings per share of Class A common stock: Basic net income per share: Year ended December 31, 2016 August 6, 2015 through December 31, 2015 Numerator Net income $ 71,247 $ 23,454 Less: net income attributable to non-controlling interests 49,747 19,348 Net income attributable to Planet Fitness, Inc. - basic & diluted $ 21,500 $ 4,106 Denominator Weighted-average shares of Class A common stock outstanding - basic 43,300,288 36,243,557 Effect of dilutive securities: Stock options 1,489 — Restricted stock units 2,908 — Weighted-average shares of Class A common stock outstanding - diluted 43,304,685 36,243,557 Earnings per share of Class A common stock - basic $ 0.50 $ 0.11 Earnings per share of Class A common stock - diluted $ 0.50 $ 0.11 Weighted average shares of Class B common stock of 55,305,992 and 62,466,183 for the year ended December 31, 2016 and the period from August 6, 2015 through December 31, 2015, respectively, were evaluated under the if-converted method for potential dilutive effects and were determined to be anti-dilutive. Weighted-average stock options outstanding of 208,452 and 108,270 for the year ended December 31, 2016 and the period from August 6, 2015 through December 31, 2015, respectively, were evaluated under the treasury stock method for potential dilutive effects and were determined to be anti-dilutive. Weighted average restricted stock units outstanding of 8,160 for the period from August 6, 2015 through December 31, 2015 were evaluated under the treasury stock method for potential dilutive effects and were determined to be anti-dilutive.

Income taxes

Income taxes	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income taxes	(15) Income taxes Income before the provision for income taxes as shown in the accompanying consolidated statements of operations is as follows: Year Ended December 31, 2016 2015 2014 Domestic $ 88,016 $ 48,716 $ 39,534 Foreign 1,892 (1,438 ) (1,056 ) Total income before the provision for income taxes 89,908 47,278 38,478 The provision (benefit) for income taxes consists of the following: Year Ended December 31, 2016 2015 2014 Current: Federal $ 1,206 $ 686 $ — State 1,428 2,188 1,078 Foreign 421 139 168 Total current tax expense 3,055 3,013 1,246 Deferred: Federal 11,633 5,636 — State 3,755 935 217 Foreign 218 (436 ) (280 ) Total deferred tax expense (benefit) 15,606 6,135 (63 ) Provision for income taxes $ 18,661 $ 9,148 $ 1,183 As a result of the recapitalization transactions, the Company became the sole managing member of Pla-Fit Holdings, which is treated as a partnership for U.S. federal and most applicable state and local income tax purposes. As a partnership, Pla-Fit Holdings is not subject to U.S. federal and certain state and local income taxes. Any taxable income or loss generated by Pla-Fit Holdings is passed through to and included in the taxable income or loss of its members, including the Company following the recapitalization transactions, on a pro rata basis. Planet Fitness, Inc. is subject to U.S. federal income taxes, in addition to state and local income taxes with respect to our allocable share of any taxable income of Pla-Fit Holdings following the recapitalization transactions. The Company is also subject to taxes in foreign jurisdictions. A reconciliation of the U.S. statutory income tax rate to the Company’s effective tax rate is as follows: Year Ended December 31, 2016 2015 U.S. statutory tax rate 35.0 % 35.0 % State and local taxes, net of federal benefit 4.9 % 6.2 % Rate change impact on deferred taxes (1.4 )% 6.9 % Tax benefit arrangement liability adjustment — % (2.1 )% Foreign tax rate differential (0.3 )% 0.3 % Withholding taxes and other — % 0.2 % Reserve for uncertain tax position 3.1 % — % Income attributable to non-controlling interests (20.5 )% (27.1 )% Effective tax rate 20.8 % 19.4 % The Company incurs U.S. federal and state income taxes on its pro rata share of income flowed through from Pla-Fit Holdings. Our effective tax rate on such income was approximately 39.5% and 39.4% for the years ended December 31, 2016 and 2015, respectively. The provision for income taxes also reflects an effective state tax rate of 2.0% and 2.5% for the years ended December 31, 2016 and 2015, respectively, applied to non-controlling interests, representing the remaining percentage of income before taxes, excluding income from variable interest entities, related to Pla-Fit Holdings. Undistributed earnings of foreign operations are not material for the years ended December 31, 2016 and 2015, respectively. Deferred income taxes are provided for the effects of temporary differences between the tax basis of an asset or liability and its reported amount in the accompanying consolidated balance sheets. These temporary differences result in taxable or deductible amounts in future years. Details of the Company’s deferred tax assets and liabilities are summarized as follows: Year Ended December 31, 2016 2015 Deferred tax assets: Accrued expense and reserves $ 865 $ 353 Deferred revenue 2,029 1,276 Goodwill and intangible assets 406,447 113,460 Net operating loss 22 716 Other 4,218 2,841 Deferred tax assets $ 413,581 $ 118,646 Deferred tax liabilities: Prepaid expenses (781 ) (674 ) Property and equipment (3,631 ) (614 ) Total deferred tax liabilities $ (4,412 ) $ (1,288 ) Total deferred tax assets and liabilities $ 409,169 $ 117,358 Reported as: Deferred income taxes - non-current assets $ 410,407 $ 117,358 Deferred income taxes - non-current liabilities (1,238 ) — Total deferred tax assets and liabilities $ 409,169 $ 117,358 The Company has net operating loss carryforwards related to its Canada operations of approximately $82, which begin to expire in 2034. The Company believes as of December 31, 2016 it is more likely than not that the results of future operations will generate sufficient taxable income to realize all deferred tax assets, and as such no valuation allowance has been recorded. A summary of the changes in the Company’s unrecognized tax positions is as follows: Year Ended December 31, 2016 2015 Balance at beginning of year $ 300 $ 300 Increases related to prior year tax positions 2,308 - Balance at end of year $ 2,608 $ 300 During the year ended December 31, 2016, the Company recognized $2,773 within current tax expense related to the establishment of a reserve for an uncertain tax position, including interest of $465. This amount relates to a potential liability associated with a 2012 state filing position currently under audit by the taxing authorities. While the Company believes it is more likely than not that its position will be sustained, the amount recorded after assessing the likelihood of various potential outcomes is based upon the facts and circumstances known as of December 31, 2016. In connection with the 2012 Acquisition of Pla-Fit Holdings on November 8, 2012 by TSG, the sellers are obligated to indemnify the Company for certain pre-acquisition tax liabilities. The Company has therefore recorded an asset and corresponding other income of $2,773 in connection with the indemnification in the year ended December 31, 2016. The Company recognizes interest and penalties, if applicable, related to uncertain tax positions as a component of income tax expense. Interest and penalties recorded for the year ended December 31, 2016 was $465. Interest and penalties for the year ended December 31, 2015 and 2014 were not material. As of December 31, 2016 and 2015, the total liability related to uncertain tax positions was $2,608 and $300, respectively. The amount of unrecognized tax benefits as of December 31, 2016 that, if recognized, would reduce income tax expense is $2,608. As of December 31, 2016, the Company anticipates that the liability for unrecognized tax benefits could decrease by up to $2,608 within the next twelve months due to the expiration of certain statutes of limitation or the settlement of examinations or issues with tax authorities The Company and its subsidiaries file U.S. federal income tax returns, as well as tax returns in various state and foreign jurisdictions. Generally, the tax years 2013 through 2016 remain open to examination by the tax authorities in these jurisdictions. The Company is currently under audit in its primary state jurisdiction, New Hampshire, for 2012 and 2013. Tax benefit arrangements The Company’s acquisition of Holdings Units in connection with the IPO and future and certain past exchanges of Holdings Units for shares of the Company’s Class A common stock (or cash at the option of the Company) are expected to produce and have produced favorable tax attributes. In connection with the IPO, the Company entered into two tax receivable agreements. Under the first of those agreements, the Company generally is required to pay to the TRA Holders 85% of the applicable tax savings, if any, in U.S. federal and state income tax that the Company is deemed to realize as a result of certain tax attributes of their Holdings Units sold to the Company (or exchanged in a taxable sale) and that are created as a result of (i) the sales of their Holdings Units for shares of Class A common stock and (ii) tax benefits attributable to payments made under the tax receivable agreement (including imputed interest). Under the second tax receivable agreement, the Company generally is required to pay to the Direct TSG Investors 85% of the amount of tax savings, if any, that the Company is deemed to realize as a result of the tax attributes of the Holdings Units held in respect of the Direct TSG Investors’ interest in the Company, which resulted from the Direct TSG Investors’ purchase of interests in Pla-Fit Holdings in 2012, and certain other tax benefits. Under both agreements, the Company generally retains the benefit of the remaining 15% of the applicable tax savings. Also, pursuant to the exchange agreement (see Note 12), to the extent an exchange results in Pla-Fit Holdings, LLC incurring a current tax liability relating to the New Hampshire business profits tax, the TRA Holders have agreed that they will contribute to Pla-Fit Holdings, LLC an amount sufficient to pay such liability (up to 3.5% of the value receive upon exchange). If and when the Company subsequently realizes a related tax benefit, Pla-Fit Holdings, LLC will distribute the amount of any such tax benefit to the relevant TRA LLC Owner in respect of its contribution. Due to changes in New Hampshire tax law during 2016, the Company no longer expects to incur any such liability under the New Hampshire business profits tax. The Company recorded other expense of $72 and other income of $2,549 in the years ended December 31, 2016 and 2015, respectively, reflecting a change in the tax benefit obligation attributable to a change in the expected tax benefits. In connection with the exchanges that occurred in the secondary offerings and other exchanges during 2016 and in the IPO during 2015, 24,704,610 and 10,491,055 Holdings Units, respectively, were redeemed by the Continuing LLC Owners for newly-issued shares of Class A common stock, resulting in an increase in the tax basis of the net assets of Pla-Fit Holdings subject to the provisions of the tax receivable agreements. As a result of the change in Planet Fitness, Inc.’s ownership percentage of Pla-Fit Holdings that occurred in conjunction with the exchanges and, in 2015, the recapitalization transactions and IPO, we recorded a decrease to our net deferred tax assets of $25,046 and $35,661, during the years ended December 31, 2016 and 2015, respectively. As a result of these exchanges, during the years ended December 31 2016 and 2015 we also recognized deferred tax assets in the amount of $332,471 and $154,335, respectively, and corresponding tax benefit arrangement liabilities of $285,730 and $136,950, respectively, representing 85% of the tax benefits due to the TRA Holders. The offset to the entries recorded in connection with exchanges in each year was to equity. The tax benefit obligation was $419,071 and $140,191 as of December 31, 2016 and 2015, respectively. Projected future payments under the tax benefit arrangements are as follows: Amount 2017 $ 11,296 2018 20,253 2019 20,438 2020 20,927 2021 21,491 Thereafter 324,666 Total $ 419,071

Commitments and contingencies

Commitments and contingencies	12 Months Ended
	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Commitments and contingencies	(16) Commitments and contingencies (a) Operating lease commitments The Company rents equipment, office, and warehouse space at various locations in the United States and Canada under noncancelable operating leases. Rental expense was $19,203, $18,186, and $16,980 for the years ended December 31, 2016, 2015 and 2014, respectively. Approximate annual future commitments under noncancelable operating leases as of December 31, 2016 are as follows: Amount 2017 $ 13,782 2018 13,342 2019 11,749 2020 10,648 2021 9,178 Thereafter 48,020 Total $ 106,719 (b) Legal matters From time to time, and in the ordinary course of business, the Company is subject to various claims, charges, and litigation, such as employment-related claims and slip and fall cases. The Company is not currently aware of any legal proceedings or claims that the Company believes will have, individually or in the aggregate, a material adverse effect on the Company’s financial position or result of operations. (c) Purchase commitments As of December 31, 2016, the Company had advertising purchase commitments of approximately $23,805, including commitments made by the NAF. In addition, the Company had open purchase orders of approximately $9,687 primarily related to equipment to be sold to franchisees. (d) Guarantees The Company has guaranteed certain leases and debt agreements of entities that were previously related through common ownership. These guarantees relate to leases for operating space, equipment, and other operating costs of franchises operated by the related entities. The Company’s maximum obligation, as a result of its guarantees of leases and debt, is approximately $1,350 and $1,871 as of December 31, 2016 and 2015, respectively, and would only require payment upon default by the primary obligor. The Company has determined the fair value of these guarantees at inception is not material, and as of December 31, 2016 and 2015, no accrual has been recorded for the Company’s potential obligation under its guaranty arrangement.

Retirement Plan

Retirement Plan	12 Months Ended
	Dec. 31, 2016
Compensation And Retirement Disclosure [Abstract]
Retirement Plan	(17) Retirement Plan The Company maintains a 401(k) deferred tax savings plan (the Plan) for eligible employees. The Plan provides for the Company to make an employer matching contribution currently equal to 100% of employee deferrals up to a maximum of 4% of each eligible participating employees’ wages. Total employer matching contributions expensed in the consolidated statements of operations were approximately $484, $384, and $211 for the years ended December 31, 2016, 2015 and 2014, respectively.

Segments

Segments	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Segments	(18) Segments The Company has three reportable segments: (i) Franchise; (ii) Corporate-owned stores; and (iii) Equipment. The Company’s operations are organized and managed by type of products and services and segment information is reported accordingly. The Company’s chief operating decision maker (the “CODM”) is its Chief Executive Officer. The CODM reviews financial performance and allocates resources by reportable segment. There have been no operating segments aggregated to arrive at the Company’s reportable segments. The Franchise segment includes operations related to the Company’s franchising business in the United States, Puerto Rico, the Dominican Republic, and Canada. The Corporate-owned stores segment includes operations with respect to all Corporate-owned stores throughout the United States and Canada. The Equipment segment includes the sale of equipment to franchisee-owned stores. The accounting policies of the reportable segments are the same as those described in Note 2. The Company evaluates the performance of its segments and allocates resources to them based on revenue and earnings before interest, taxes, depreciation, and amortization, referred to as Segment EBITDA. Revenues for all operating segments include only transactions with unaffiliated customers and include no intersegment revenues. The tables below summarize the financial information for the Company’s reportable segments for the years ended December 31, 2016, 2015 and 2014. The “Corporate and other” column, as it relates to Segment EBITDA, primarily includes corporate overhead costs, such as payroll and related benefit costs and professional services which are not directly attributable to any individual segment. Year Ended December 31, 2016 2015 2014 Revenue Franchise segment revenue - U.S. $ 114,717 $ 87,299 $ 71,806 Franchise segment revenue - International 1,771 786 — Franchise segment total 116,488 88,085 71,806 Corporate-owned stores segment - U.S. 100,541 95,459 85,022 Corporate-owned stores segment - International 4,180 2,931 19 Corporate-owned stores segment total 104,721 98,390 85,041 Equipment segment - U.S. 157,032 144,062 122,930 Equipment segment total 157,032 144,062 122,930 Total revenue $ 378,241 $ 330,537 $ 279,777 Franchise segment revenue includes franchise revenue and commission income. Franchise revenue includes revenue generated from placement services of $10,513, $9,806, and $8,450 for the years ended December 31, 2016, 2015 and 2014, respectively. Year Ended December 31, 2016 2015 2014 Segment EBITDA Franchise $ 97,256 $ 66,030 $ 53,109 Corporate-owned stores 40,847 36,070 31,705 Equipment 36,439 31,936 26,447 Corporate and other (26,007 ) (30,051 ) (18,642 ) Total Segment EBITDA $ 148,535 $ 103,985 $ 92,619 The following table reconciles total Segment EBITDA to income before taxes: Year Ended December 31, 2016 2015 2014 Total Segment EBITDA $ 148,535 $ 103,985 $ 92,619 Less: Depreciation and amortization 31,502 32,158 32,341 Other expense 1,371 (275 ) (1,261 ) Income from operations 115,662 72,102 61,539 Interest expense, net (27,125 ) (24,549 ) (21,800 ) Other income (expense) 1,371 (275 ) (1,261 ) Income before income taxes $ 89,908 $ 47,278 $ 38,478 The following table summarizes the Company’s assets by reportable segment: December 31, 2016 December 31, 2015 Franchise $ 202,580 $ 206,997 Corporate-owned stores 153,761 151,620 Equipment 208,809 208,168 Unallocated 436,292 132,392 Total consolidated assets $ 1,001,442 $ 699,177 The table above includes $2,795 and $3,149 of long-lived assets located in the Company’s international corporate-owned stores as of December 31, 2016 and 2015 The following table summarizes the Company’s goodwill by reportable segment: December 31, 2016 December 31, 2015 Franchise $ 16,938 $ 16,938 Corporate-owned stores 67,377 67,377 Equipment 92,666 92,666 Total consolidated goodwill $ 176,981 $ 176,981

Corporate-owned and franchisee-

Corporate-owned and franchisee-owned stores	12 Months Ended
	Dec. 31, 2016
Other Industries [Abstract]
Corporate-owned and franchisee-owned stores	(19) Corporate-owned and franchisee-owned stores The following table shows changes in our corporate-owned and franchisee-owned stores for the years ended December 31, 2016, 2015 and 2014: Year Ended December 31, 2016 2015 2014 Franchisee-owned stores: Stores operated at beginning of period 1,066 863 704 New stores opened 195 206 169 Stores debranded, sold or consolidated (1) (6 ) (3 ) (10 ) Stores operated at end of period 1,255 1,066 863 Corporate-owned stores: Stores operated at beginning of period 58 55 45 New stores opened — 3 2 Stores acquired from franchisees — — 8 Stores operated at end of period 58 58 55 Total stores: Stores operated at beginning of period 1,124 918 749 New stores opened 195 209 171 Stores debranded, sold or consolidated (1) (6 ) (3 ) (2 ) Stores operated at end of period 1,313 1,124 918 (1) The term “debrand” refers to a franchisee-owned store whose right to use the Planet Fitness brand and marks has been terminated in accordance with the franchise agreement. We retain the right to prevent debranded stores from continuing to operate as fitness centers. The term “consolidated” refers to the combination of a franchisee’s store with another store located in close proximity with our prior approval. This often coincides with an enlargement, re-equipment and/or refurbishment of the remaining store.

Quarterly financial data (unaud

Quarterly financial data (unaudited)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Quarterly financial data (unaudited)	(20) Quarterly financial data (unaudited) For the quarter ended March 31, 2016 June 30, 2016 September 30, 2016 December 31, 2016 Total revenue $ 83,343 $ 91,472 $ 87,007 $ 116,419 Income from operations 25,610 27,831 26,153 36,068 Net income 16,345 18,091 14,863 21,948 Net income attributable to Planet Fitness, Inc. 3,368 4,132 3,425 10,575 Earnings per share: Class A - Basic $ 0.09 $ 0.11 $ 0.08 $ 0.19 Class A - Diluted $ 0.09 $ 0.11 $ 0.08 $ 0.18 For the quarter ended March 31, 2015 June 30, 2015 September 30, 2015 December 31, 2015 Total revenue $ 76,923 $ 78,952 $ 68,817 $ 105,845 Income from operations 14,304 18,667 10,338 28,793 Net income 8,541 11,612 737 17,240 Net income attributable to Planet Fitness, Inc. 8,425 11,501 (3,893 ) 2,485 Earnings per share (1) August 6 through September 30, 2015 For the quarter ended December 31, 2015 Class A - Basic $ 0.05 $ 0.06 Class A - Diluted $ 0.04 $ 0.06 (1) Represents earnings per share of Class A common stock and weighted-average shares of Class A common stock outstanding for the periods from August 6, 2015 through September 30, 2015 and the quarter ended December 31, 2015, the periods following the recapitalization transactions and IPO (see Note 14).

Summary of significant accoun28

Summary of significant accounting policies (Policies)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Basis of presentation and consolidation	(a) Basis of presentation and consolidation The accompanying consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (U.S. GAAP) and pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). All significant intercompany balances and transactions have been eliminated in consolidation. As discussed in Note 1, as a result of the recapitalization transactions, Planet Fitness, Inc. consolidates Pla-Fit Holdings and Pla-Fit Holdings is considered to be the predecessor to Planet Fitness, Inc. for accounting and reporting purposes. The Company also consolidates entities in which it has a controlling financial interest, the usual condition of which is ownership of a majority voting interest. The Company also considers for consolidation certain interests where the controlling financial interest may be achieved through arrangements that do not involve voting interests. Such an entity, known as a variable interest entity (“VIE”), is required to be consolidated by its primary beneficiary. The primary beneficiary of a VIE is considered to possess the power to direct the activities of the VIE that most significantly impact its economic performance and has the obligation to absorb losses or the rights to receive benefits from the VIE that are significant to it. The principal entities in which the Company possesses a variable interest include franchise entities and certain other entities. The Company is not deemed to be the primary beneficiary for Planet Fitness franchise entities. Therefore, these entities are not consolidated. The results of the Company have been consolidated with Matthew Michael Realty LLC (“MMR”) and PF Melville LLC (“PF Melville”) based on the determination that the Company is the primary beneficiary with respect to these VIEs. These entities are real estate holding companies that derive a majority of their financial support from the Company through lease agreements for corporate stores. See Note 3 for further information related to the Company’s VIEs.
Use of estimates	(b) Use of estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Although these estimates are based on management’s knowledge of current events and actions it may undertake in the future, they may ultimately differ from actual results. Significant areas where estimates and judgments are relied upon by management in the preparation of the consolidated financial statements include revenue recognition, valuation of assets and liabilities in connection with acquisitions, valuation of equity-based compensation awards, the evaluation of the recoverability of goodwill and long-lived assets, including intangible assets, income taxes, including deferred tax assets and liabilities and reserves for unrecognized tax benefits, and the liability for the Company’s tax benefit arrangements.
Concentrations	(c) Concentrations Cash and cash equivalents are financial instruments, which potentially subject the Company to a concentration of credit risk. The Company invests its excess cash in several major financial institutions, which are insured by the Federal Deposit Insurance Corporation (FDIC) up to $250,000. The Company maintains balances in excess of these limits, but does not believe that such deposits with its banks are subject to any unusual risk. The credit risk associated with trade receivables is mitigated due to the large number of customers, generally our franchisees, and their broad dispersion over many different geographic areas. We do not have any concentrations with respect to our revenues. The Company purchases equipment, both for corporate-owned stores and for sales to franchisee-owned stores, from two primary vendors. For the year ended December 31, 2016 purchases from these two vendors comprised 83% and 13%, respectively, for the year ended December 31, 2015 purchases from these two vendors comprised 79% and 18%, respectively, and for the year ended December 31, 2014 purchases from these two vendors comprised 66% and 25%, respectively, of total equipment purchases. The Company, including Planet Fitness NAF, LLC (“NAF”) uses two primary vendors for advertising services. For year ended December 31, 2016, purchases from these two vendors comprised 25% and 16%, respectively, for the year ended December 31, 2015 purchases from these two vendors comprised 49% and 0%, respectively, and for the year ended December 31, 2014 purchases from these two vendors comprised 61% and 0%, respectively, of total advertising purchases (see Note 5 for further discussion of NAF).
Cash and cash equivalents	(d) Cash and cash equivalents The Company considers all highly liquid investments purchased with an original maturity of 90 days or less to be cash equivalents. Cash held within the NAF is recorded as a restricted asset (see Note 5).
Revenue recognition	(e) Revenue recognition Franchise revenue The following revenues are generated as a result of transactions with or related to the Company’s franchisees. Area development fees Franchisees contractually enter into area development agreements (ADAs) to secure the exclusive right to open franchise stores within a defined geographical area. ADAs establish the timing and number of stores to be developed within the defined geographical area. Pursuant to an ADA, a franchisee is generally required to pay an initial nonrefundable development fee for a minimum number of stores to be developed, as outlined in the respective ADA. ADA fees collected in advance are deferred until the Company provides substantially all required obligations pursuant to the ADA. As the efforts and total cost relating to initial services are affected significantly by the number of stores opened in an area, the respective ADA is treated as a divisible contract. As each new site is accepted under an ADA, a franchisee signs a franchise operating agreement for the respective franchise location. As each store opened under an ADA typically has performance obligations associated with it, the Company recognizes ADA revenue as each individual franchise location is developed in proportion to the total number of stores to be developed under the ADA. These obligations are typically completed once the store is opened or the franchisee executes the individual property lease. As of December 31, 2016 and 2015, the deferred revenue for ADAs was $10,026 and $10,471, respectively. ADAs generally have an initial term equal to the number of years over which the franchisee is required to open franchise stores, which is typically 5 to 10 years. There is no right of refund for an executed ADA. Upon default, as defined in the agreement, the Company may reacquire the rights pursuant to an ADA, and all remaining deferred revenue is recognized at that time. Franchise fees and performance fees The Company generally charges an initial upfront nonrefundable franchise fee. Nonrefundable franchise fees are typically deferred until the franchisee executes a lease and receives initial training for the location, which is the point at which the Company has determined it has provided all of its material obligations required to recognize revenue. As of December 31, 2016 and 2015, the Company has recorded deferred franchise fees of $260 and $473, respectively, relating to stores to be opened in future years. These amounts are included in deferred revenue as of December 31, 2016 and 2015. The individual franchise agreements typically have a 10-year initial term, but provide the franchisee with an opportunity to enter into successive renewals subject to certain conditions. Transfer fees The Company’s current franchise agreement provides that upon the transfer of a Planet Fitness store to a different franchisee, the Company is entitled to a transfer fee in the amount of the greater of $25, or $10 per store being transferred, if more than one, in addition to reimbursement of out-of-pocket expenses, including external legal and administrative costs incurred in connection with the transfer. Transfer-related fees and expenses are due, payable, and recognized at the time the transfer is effectuated. Royalties Royalties, which represent recurring fees paid by franchisees based on the franchisee-owned stores’ monthly membership billings, are recognized on a monthly basis over the term of the franchise agreement. As specified under certain franchise agreements, the Company recognizes additional royalty fees as the franchisee-owned stores attain contractual monthly membership billing threshold amounts. Beginning in 2010, for all new franchise agreements entered into, the Company began charging a fixed royalty percentage based upon gross membership billings. Other fees Online member join fees are paid to the Company by franchisees for processing new membership transactions when a new member signs up for a membership to a franchisee-owned store through the Company’s website. Billing transaction fees are paid to the Company for the processing of franchisee membership dues and annual fees through the Company’s third-party hosted point-of-sale system. Placement The Company is generally responsible for assembly and placement of equipment it sells to franchisee-owned stores. Placement revenue is recognized upon completion and acceptance of the services at the franchise location. Commission income The Company recognizes commission income from its franchisees’ use of preferred vendor arrangements. Commissions are recognized when amounts have been earned and collectability from the vendor is reasonably assured. Corporate-owned stores revenue The following revenues are generated from stores owned and operated by the Company. Membership dues revenue Customers are offered multiple membership choices varying in length. Membership dues are earned and recognized over the membership term on a straight-line basis. Enrollment fee revenue Enrollment fees are charged to new members at the commencement of their membership. The Company recognizes enrollment fees ratably over the estimated duration of the membership life, which is generally two years. Annual membership fee revenue Annual membership fees are annual fees charged to members in addition to and in order to maintain low monthly membership dues. The Company recognizes annual membership fees ratably over the 12-month membership period. Retail sales The Company sells Planet Fitness branded apparel, food, beverages, and other accessories. The revenue for these items is recognized at the point of sale. Equipment revenue The Company sells and delivers equipment purchased from third-party equipment manufacturers to U.S. based franchisee-owned stores. Equipment revenue is recognized upon the equipment being delivered to and assembled at each store and accepted by the franchisee. Franchisees are charged for all freight costs incurred for the delivery of equipment. Freight revenue is recorded within equipment revenue and freight costs are recorded within cost of revenue. The Company recognizes revenue on a gross basis in these transactions as management has determined the Company to be the principal in these transactions. Management determined the Company to be the principal because the Company is the primary obligor in these transactions, the Company has latitude in establishing prices for the equipment sales to franchisees, the Company has supplier selection discretion and is involved in determination of product specifications, and the Company bears all credit risk associated with obligations to the equipment manufacturers. Equipment deposits are recognized as a liability on the accompanying consolidated balance sheets until delivery, assembly (if required), and acceptance by the franchisee. As of December 31, 2016 and 2015, equipment deposits were $2,170 and $5,587, respectively. Sales tax All revenue amounts are recorded net of applicable sales tax.
Deferred revenue	(f) Deferred revenue Deferred revenue represents cash received from franchisees for ADAs and franchise fees for which revenue recognition criteria has not yet been met and cash received from members for enrollment fees, membership dues and annual fees for the portion not yet earned based on the membership period.
Cost of revenue	(g) Cost of revenue Cost of revenue consists of direct costs associated with equipment sales (including freight costs), the cost of retail merchandise sold in corporate-owned stores, and prior to 2016 also included direct costs related to the maintenance and support of the Company’s proprietary system-wide point-of-sale system. Costs related to the point-of-sale system were $0, $1,236, and $3,385 for the years ended December 31, 2016, 2015 and 2014 respectively. Costs related to retail merchandise sales were immaterial in all periods presented. Rebates from equipment vendors where the Company has recognized the related equipment revenue and costs are recorded as a reduction to the cost of revenue.
Store operations	(h) Store operations Store operations consists of the direct costs related to operating corporate-owned stores, including our store management and staff, rent expense, utilities, supplies, maintenance, and local advertising.
Selling, general and administrative	(i) Selling, general and administrative Selling, general and administrative expenses consist of costs associated with administrative and franchisee support functions related to our existing business as well as growth and development activities. These costs primarily consist of payroll, IT related, marketing, legal and accounting expenses. These expenses include costs related to placement services of $3,974, $3,452, and $2,743, for the years ended December 31, 2016, 2015 and 2014, respectively.
Accounts and notes receivable	(j) Accounts receivable Accounts receivable is primarily comprised of amounts owed to the Company resulting from equipment, placement, and commission revenue. The Company evaluates its accounts receivable on an ongoing basis and may establish an allowance for doubtful accounts based on collections and current credit conditions. Accounts are written off as uncollectible when it is determined that further collection efforts will be unsuccessful. Historically, the Company has not had a significant amount of write-offs.
Leases and asset retirement obligations	(k) Leases and asset retirement obligations The Company recognizes rent expense related to leased office and operating space on a straight-line basis over the term of the lease. The difference between rent expense and rent paid, if any, as a result of escalation provisions and lease incentives, such as tenant improvements provided by lessors, and is recorded as deferred rent in the Company’s consolidated balance sheets. In accordance with ASC Topic 410, Asset Retirement and Environmental Obligations
Property and equipment	(l) Property and equipment Property and equipment is recorded at cost and depreciated using the straight-line method over its related estimated useful life. Leasehold improvements are amortized over the shorter of the lease term or the estimated useful life of the related asset, whichever is shorter. Upon sale or retirement, the asset cost and related accumulated depreciation are removed from the respective accounts, and any related gain or loss is reflected in the consolidated statements of operations. Ordinary maintenance and repair costs are expensed as incurred. The estimated useful lives of the Company’s fixed assets by class of asset are as follows: Years Buildings and building improvements 20–40 Computers and equipment 3 Furniture and fixtures 5 Leasehold improvements Useful life or term of lease whichever is shorter Fitness equipment 5–7 Vehicles 5
Advertising expenses	(m) Advertising expenses The Company expenses advertising costs as incurred. Advertising expenses, net of amounts reimbursed by franchisees, are included within store operations and selling, general and administrative expenses and totaled $8,270, $9,349, and $7,272 for the years ended December 31, 2016, 2015 and 2014, respectively. See Note 5 for discussion of the national advertising fund.
Goodwill, long-lived assets, and other intangible assets	(n) Goodwill, long-lived assets, and other intangible assets Goodwill and other intangible assets that arise from acquisitions are recorded in accordance with ASC Topic 350, Intangibles—Goodwill and Other Goodwill and indefinite-lived intangible assets are not amortized, but are reviewed annually for impairment or more frequently if impairment indicators arise. Separable intangible assets that are not deemed to have an indefinite life are amortized over their estimated useful lives on either a straight-line or accelerated basis as deemed appropriate, and are reviewed for impairment when events or circumstances suggest that the assets may not be recoverable. The Company performs its annual test for impairment of goodwill and indefinite lived intangible assets on December 31 of each year. For goodwill, the first step of the impairment test is to determine whether the carrying amount of a reporting unit exceeds the fair value of the reporting unit. If the carrying amount of the reporting unit exceeds the reporting unit’s fair value, the Company would be required to perform a second step of the impairment test as this is an indication that the reporting unit’s goodwill may be impaired. The second step compares the implied fair value of the reporting unit’s goodwill with the carrying amount of that goodwill. Any impairment loss would be recognized in an amount equal to the excess of the carrying value of the goodwill over the implied fair value of the goodwill. The Company is also permitted to make a qualitative assessment of whether it is more likely than not that a reporting unit’s fair value is less than its carrying amount before applying the two-step goodwill impairment test. If the Company concludes it is not more likely than not that the fair value of a reporting unit is less than its carrying amount, it need not perform the two-step impairment test. For indefinite lived intangible assets, the impairment assessment consists of comparing the carrying value of the asset to its estimated fair value. To the extent that the carrying value exceeds the fair value of the asset, an impairment is recorded to reduce the carrying value to its fair value. The Company is also permitted to make a qualitative assessment of whether it is more likely than not an indefinite lived intangible asset’s fair value is less than its carrying value prior to applying the quantitative assessment. If based on the Company’s qualitative assessment it is not more likely than not that the carrying value of the asset is less than its fair value, then a quantitative assessment is not required. The Company determined that no impairment charges were required during any periods presented. The Company applies the provisions of ASC Topic 360, Property, Plant and Equipment
Income taxes	(o) Income taxes The Company accounts for income taxes using the asset and liability method. Deferred income taxes are recognized for the expected future tax consequences attributable to temporary differences between the carrying amount of the existing tax assets and liabilities and their respective tax basis. Deferred tax assets and liabilities are measured using enacted tax rates expected to be applied in the years in which temporary differences are expected to be recovered or settled. The principal items giving rise to temporary differences are the use of accelerated depreciation and certain basis differences resulting from acquisitions and the recapitalization transactions. Valuation allowances are established when necessary to reduce deferred tax assets to the amount expected to be realized. As a result of the recapitalization transactions, Planet Fitness, Inc. became the sole managing member of Pla-Fit Holdings, which is treated as a partnership for U.S. federal and most applicable state and local income tax purposes. As a partnership, Pla-Fit Holdings is not subject to U.S. federal and certain state and local income taxes. Any taxable income or loss generated by Pla-Fit Holdings is passed through to and included in the taxable income or loss of its members, including Planet Fitness, Inc. following the recapitalization transactions, on a pro rata basis. Planet Fitness, Inc. is subject to U.S. federal income taxes, in addition to state and local income taxes with respect to our allocable share of any taxable income of Pla-Fit Holdings following the recapitalization transactions. The Company is also subject to taxes in foreign jurisdictions. The Company recognizes the effect of income tax positions only if those positions are more likely than not to be sustained. Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs (see Note 15).
Tax benefit arrangements	(p) Tax benefit arrangements The Company’s acquisition of Holdings Units in connection with the IPO and future and certain past exchanges of Holdings Units for shares of the Company’s Class A common stock (or cash at the option of the Company) are expected to produce and have produced favorable tax attributes. In connection with the IPO, the Company entered into two tax receivable agreements. Under the first of those agreements, the Company generally is required to pay to certain existing and previous equity owners of Pla-Fit Holdings, LLC who are unaffiliated with TSG (the “TRA Holders”) 85% of the applicable tax savings, if any, in U.S. federal and state income tax that the Company is deemed to realize as a result of certain tax attributes of their Holdings Units sold to the Company (or exchanged in a taxable sale) and that are created as a result of (i) the sales of their Holdings Units for shares of Class A common stock and (ii) tax benefits attributable to payments made under the tax receivable agreement (including imputed interest). Under the second tax receivable agreement, the Company generally is required to pay to the Direct TSG Investors 85% of the amount of tax savings, if any, that the Company is deemed to realize as a result of the tax attributes of the Holdings Units held in respect of the Direct TSG Investors’ interest in the Company, which resulted from the Direct TSG Investors’ purchase of interests in Pla-Fit Holdings in 2012, and certain other tax benefits. Under both agreements, the Company generally retains the benefit of the remaining 15% of the applicable tax savings. Also, pursuant to the exchange agreement, to the extent an exchange results in Pla-Fit Holdings, LLC incurring a current tax liability relating to the New Hampshire business profits tax, the TRA Holders have agreed that they will contribute to Pla-Fit Holdings, LLC an amount sufficient to pay such tax liability (up to 3.5% of the value received upon exchange). If and when the Company subsequently realizes a related tax benefit, Pla-Fit Holdings, LLC will distribute the amount of any such tax benefit to the relevant Continuing LLC Owner in respect of its contribution. Due to changes in New Hampshire tax law, the Company no longer expects to incur any such liability under the New Hampshire business profits tax. Based on current projections, the Company anticipates having sufficient taxable income to utilize these tax attributes and receive corresponding tax deductions in future periods. Accordingly, as of December 31, 2016 the Company has recorded a liability of $419,071 payable to the Direct TSG Investors and TRA Holders under the tax benefit obligations, representing approximately 85% of the calculated tax savings based on the original basis adjustments the Company anticipates being able to utilize in future years. Changes in the projected liability resulting from these tax benefit arrangements may occur based on changes in anticipated future taxable income, changes in applicable tax rates or other changes in tax attributes that may occur and impact the expected future tax benefits to be received by the Company. Changes in the projected liability under these tax benefit arrangements will be recorded as a component of other income (expense) each period. The projection of future taxable income involves significant judgment. Actual taxable income may differ from estimates, which could significantly impact the liability under the tax benefit arrangements and the Company’s consolidated results of operations.
Fair value	(q) Fair value ASC 820, Fair Value Measurements and Disclosures Level 1—Inputs to the valuation methodology are quoted prices (unadjusted) for identical assets or liabilities in active markets. Level 2—Inputs to the valuation methodology include quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the financial instrument. Level 3—Inputs to the valuation methodology are unobservable and significant to the fair value measurement. The table below presents information about the Company’s assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2016 and December 31, 2015: Quoted Significant Total fair prices other Significant value at in active observable unobservable December 31, markets inputs inputs 2016 (Level 1) (Level 2) (Level 3) Interest rate caps $ 306 $ — $ 306 $ — Quoted Significant Total fair prices other Significant value at in active observable unobservable December 31, markets inputs inputs 2015 (Level 1) (Level 2) (Level 3) Interest rate caps $ 1,147 $ — $ 1,147 $ —
Financial instruments	(r) Financial instruments The carrying values of cash and cash equivalents, accounts receivable and accounts payable approximate fair value because of the short-term nature of these instruments. The carrying value of debt also approximates fair value as it is variable rate debt. The Company has determined that the determination of fair value of amounts due from related parties under long-term arrangements is impracticable given the related-party nature of these agreements.
Derivative instruments and hedging activities	(s) Derivative instruments and hedging activities The Company recognizes all derivative instruments as either assets or liabilities in the balance sheet at their respective fair values. For derivatives designated in hedging relationships, changes in the fair value are either offset through earnings against the change in fair value of the hedged item attributable to the risk being hedged or recognized in accumulated other comprehensive income, to the extent the derivative is effective at offsetting the changes in cash flows being hedged until the hedged item affects earnings. The Company only enters into derivative contracts that it intends to designate as a hedge of a forecasted transaction or the variability of cash flows to be received or paid related to a recognized asset or liability (cash flow hedge). For all hedging relationships, the Company formally documents the hedging relationship and its risk-management objective and strategy for undertaking the hedge, the hedging instrument, the hedged transaction, the nature of the risk being hedged, how the hedging instrument’s effectiveness in offsetting the hedged risk will be assessed prospectively and retrospectively, and a description of the method used to measure ineffectiveness. The Company also formally assesses, both at the inception of the hedging relationship and on an ongoing basis, whether the derivatives that are used in hedging relationships are highly effective in offsetting changes in cash flows of hedged transactions. For derivative instruments that are designated and qualify as part of a cash flow hedging relationship, the effective portion of the gain or loss on the derivative is reported as a component of other comprehensive income and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings. Gains and losses on the derivative representing either hedge ineffectiveness or hedge components excluded from the assessment of effectiveness are recognized in current earnings. The Company discontinues hedge accounting prospectively when it determines that the derivative is no longer effective in offsetting cash flows attributable to the hedged risk, the derivative expires or is sold, terminated, or exercised, the cash flow hedge is de-designated because a forecasted transaction is not probable of occurring, or management determines to remove the designation of the cash flow hedge. In all situations in which hedge accounting is discontinued and the derivative remains outstanding, the Company continues to carry the derivative at its fair value on the balance sheet and recognizes any subsequent changes in its fair value in earnings. When it is probable that a forecasted transaction will not occur, the Company discontinues hedge accounting and recognizes immediately in earnings gains and losses that were accumulated in other comprehensive income related to the hedging relationship. See Note 9 for further information.
Equity-based compensation	(t) Equity-based compensation The Company has an equity-based compensation plan under which it receives services from employees as consideration for equity instruments of the Company. The compensation expense is determined based on the fair value of the award as of the grant date. Compensation expense is recognized over the vesting period, which is the period over which all of the specified vesting conditions are satisfied. For awards with graded vesting, the fair value of each tranche is recognized over its respective vesting period. See Note 13 for further information.
Guarantees	(u) Guarantees The Company, as a guarantor, is required to recognize, at inception of the guaranty, a liability for the fair value of the obligation undertaken in issuing the guarantee. See Notes 3 and 16 for further discussion of such obligations guaranteed.
Contingencies	(v) Contingencies The Company records estimated future losses related to contingencies when such amounts are probable and estimable. The Company includes estimated legal fees related to such contingencies as part of the accrual for estimated future losses.
Reclassifications	(w) Reclassifications Certain amounts have been reclassified to conform to current year presentation.
Recent accounting pronouncements	(x) Recent accounting pronouncements The FASB issued ASU No. 2015-02, Income Statement—Consolidation, The FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, The FASB issued ASU No. 2015-05: Intangibles - Goodwill and Other - Internal-Use Software: Customer's Accounting for Fees Paid in a Cloud Computing Arrangement In September 2015, the FASB issued Accounting Standards Update No. 2015-16, Business Combinations (Topic 805): Simplifying the Accounting for Measurement-Period Adjustments The FASB issued ASU No. 2016-02, Leases The FASB issued ASU No. 2016-09, Stock Compensation The FASB issued ASU No. 2016-15, Classification of Certain Cash Receipts and Cash Payments

Summary of significant accoun29

Summary of significant accounting policies (Tables)	12 Months Ended
	Dec. 31, 2016
Accounting Policies [Abstract]
Schedule of Estimated Useful Lives of Fixed Assets	The estimated useful lives of the Company’s fixed assets by class of asset are as follows: Years Buildings and building improvements 20–40 Computers and equipment 3 Furniture and fixtures 5 Leasehold improvements Useful life or term of lease whichever is shorter Fitness equipment 5–7 Vehicles 5
Summary of Company's Assets and Liabilities Measured at Fair Value on Recurring Basis	The table below presents information about the Company’s assets and liabilities that are measured at fair value on a recurring basis as of December 31, 2016 and December 31, 2015: Quoted Significant Total fair prices other Significant value at in active observable unobservable December 31, markets inputs inputs 2016 (Level 1) (Level 2) (Level 3) Interest rate caps $ 306 $ — $ 306 $ — Quoted Significant Total fair prices other Significant value at in active observable unobservable December 31, markets inputs inputs 2015 (Level 1) (Level 2) (Level 3) Interest rate caps $ 1,147 $ — $ 1,147 $ —

Variable interest entities (Tab

Variable interest entities (Tables)	12 Months Ended
	Dec. 31, 2016
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Carrying Value of Variable Interest Entities of Consolidated Financial Statements	The carrying values of VIEs included in the consolidated financial statements as of December 31, 2016 and December 31, 2015 are as follows: December 31, 2016 December 31, 2015 Assets Liabilities Assets Liabilities PF Melville $ 4,071 $ — $ 3,728 $ — MMR $ 3,156 — $ 2,953 — Total $ 7,227 $ — $ 6,681 $ —

Property and equipment (Tables)

Property and equipment (Tables)	12 Months Ended
	Dec. 31, 2016
Property Plant And Equipment [Abstract]
Schedule of Property and Equipment	Property and equipment as of December 31, 2016 and 2015 consists of the following: December 31, 2016 December 31, 2015 Land $ 910 $ 910 Equipment 27,283 27,391 Leasehold improvements 41,249 38,288 Buildings and improvements 5,107 5,107 Furniture & fixtures 3,708 3,030 Other 5,673 2,947 Construction in progress 8,295 1,991 92,225 79,664 Accumulated Depreciation (30,987 ) (23,525 ) Total $ 61,238 $ 56,139

Goodwill and intangible assets

Goodwill and intangible assets (Tables)	12 Months Ended
	Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Summary of Goodwill and Intangible Assets	A summary of goodwill and intangible assets at December 31, 2016 and 2015 is as follows: Weighted average Gross amortization carrying Accumulated Net carrying December 31, 2016 period (years) amount amortization Amount Customer relationships 11.1 $ 171,782 (72,655 ) $ 99,127 Noncompete agreements 5.0 14,500 (12,027 ) 2,473 Favorable leases 7.5 2,935 (1,643 ) 1,292 Order backlog 0.4 3,400 (3,400 ) — Reacquired franchise rights 5.8 8,950 (4,280 ) 4,670 201,567 (94,005 ) 107,562 Indefinite-lived intangible: Trade and brand names N/A 146,300 — 146,300 Total intangible assets $ 347,867 $ (94,005 ) $ 253,862 Goodwill $ 176,981 $ — $ 176,981 Weighted average Gross amortization carrying Accumulated Net carrying December 31, 2015 period (years) amount amortization Amount Customer relationships 11.1 $ 171,782 (57,741 ) $ 114,041 Noncompete agreements 5.0 14,500 (9,127 ) 5,373 Favorable leases 7.5 2,935 (1,256 ) 1,679 Order backlog 0.4 3,400 (3,400 ) — Reacquired franchise rights 5.8 8,950 (2,724 ) 6,226 201,567 (74,248 ) 127,319 Indefinite-lived intangible: Trade and brand names N/A 146,300 — 146,300 Total intangible assets $ 347,867 $ (74,248 ) $ 273,619 Goodwill $ 176,981 $ — $ 176,981
Summary of Amortization expenses	The anticipated annual amortization expense to be recognized in future years as of December 31, 2016 is as follows: Amount 2017 $ 18,215 2018 14,583 2019 14,215 2020 12,517 2021 12,422 Thereafter 35,610 Total $ 107,562

Long-term debt (Tables)

Long-term debt (Tables)	12 Months Ended
	Dec. 31, 2016
Debt Disclosure [Abstract]
Schedule of Long-term Debt	Long-term debt as of December 31, 2016 and 2015 consists of the following: December 31, 2016 December 31, 2015 Term loan B requires quarterly installments plus interest through the term of the loan, maturing March 31, 2021. Outstanding borrowings bear interest at LIBOR or base rate (as defined) plus a margin at the election of the borrower (4.33% at December 31, 2016 and 4.75% at December 31, 2015) $ 716,654 $ 492,275 Revolving credit line, requires interest only payments through the term of the loan, maturing March 31, 2019. Outstanding borrowings bear interest at LIBOR or base rate (as defined) plus a margin at the election of the borrower (6.00% at December 31, 2016 and 5.50% at December 31, 2015) — — Total debt, excluding deferred financing costs 716,654 492,275 Deferred financing costs, net of accumulated amortization (7,466 ) (7,396 ) Total debt 709,188 484,879 Current portion of long-term debt and line of credit 7,185 5,100 Long-term debt, net of current portion $ 702,003 $ 479,779
Schedule of Future Annual Payments of Long-term Debt	Future annual principal payments of long-term debt as of December 31, 2016 are as follows: Amount 2017 $ 7,185 2018 7,185 2019 7,185 2020 7,185 2021 687,914 Thereafter - Total $ 716,654

Deferred revenue (Tables)

Deferred revenue (Tables)	12 Months Ended
	Dec. 31, 2016
Deferred Revenue Disclosure [Abstract]
Schedule of Deferred Revenue	The summary set forth below represents the balances in deferred revenue as of December 31, 2016 and 2015: December 31, 2016 December 31, 2015 Prepaid membership fees $ 5,034 $ 5,134 Enrollment fees 1,240 1,555 Equipment discount 2,796 2,968 Annual membership fees 6,775 6,132 Area development and franchise fees 10,286 10,944 Total deferred revenue 26,131 26,733 Long-term portion of deferred revenue 8,351 12,016 Current portion of deferred revenue $ 17,780 $ 14,717

Related party transactions (Tab

Related party transactions (Tables)	12 Months Ended
	Dec. 31, 2016
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	Activity with franchisees considered to be related parties is summarized below. For the Year Ended December 31, 2016 2015 2014 Franchise revenue $ 1,760 $ 1,232 $ 733 Equipment revenue 1,338 1,686 3,711 Total revenue from related parties $ 3,098 $ 2,918 $ 4,444

Equity-based Compensation (Tabl

Equity-based Compensation (Tables)	12 Months Ended
	Dec. 31, 2016
Summary of Unvested Holdings Unit Activity	A summary of unvested Holdings Unit activity is presented below: Holdings Units Weighted average grant date fair value Weighted average remaining contractual term (years) Aggregate intrinsic value Unvested outstanding at January 1, 2016 1,805,783 $ 1.52 Units granted — Units forfeited (126,482 ) $ 1.52 Units vested (654,285 ) $ 1.52 Unvested outstanding at December 31, 2016 1,025,016 $ 1.52 1.4 $ 20,603
Summary of Stock Option Activity	A summary of stock option activity for the year ended December 31, 2016: Stock Options Weighted exercise price Weighted average remaining contractual term (years) Aggregate intrinsic value Outstanding at January 1, 2016 108,270 $ 16.15 Granted 309,683 $ 17.90 Exercised (8,483 ) $ 16.00 Forfeited (5,000 ) $ 16.00 Outstanding at December 31, 2016 404,470 $ 17.49 9.2 $ 1,055 Vested or expected to vest at December 31, 2016 392,755 $ 17.47 9.2 $ 1,032 Exercisable at December 31, 2016 17,324 $ 16.23 8.6 $ 67
Restricted Stock Units [Member]
Summary of Restricted Stock Units Activity (Detail)	Stock Options Weighted fair value Weighted average remaining contractual term (years) Aggregate intrinsic value Unvested at January 1, 2016 8,160 $ 18.38 Granted 2,447 $ 20.43 Vested (2,720 ) $ 18.38 Unvested outstanding at December 31, 2016 7,887 $ 19.02 1.0 $ 159
2013 Equity Incentive Plan [Member]
Fair Value of Stock Option Awards Determined on Grant Date	Valuation assumptions: Year ended December 31, 2014 Expected term (years) 1.70 Expected volatility 36.8 % Risk-free interest rate 0.4 % Dividend yield —
2015 Omnibus Incentive Plan [Member]
Fair Value of Stock Option Awards Determined on Grant Date	The fair value of stock option awards granted were determined on the grant date using the Black-Scholes valuation model based on the following assumptions: Year ended December 31, 2016 2015 Expected term (years) (1) 6.25 6.25 Expected volatility (2) 33.2% - 34.4% 35.4 % Risk-free interest rate (3) 1.31% - 1.76% 1.70% - 1.82% Dividend yield (4) — — (1) Expected term represents the estimated period of time until an award is exercised and was determined using the simplified method. (2) Expected volatility is based on the historical volatility of a selected peer group over a period equivalent to the expected term. (3) The risk-free rate is an interpolation of yields on U.S. Treasury securities with maturities equivalent to the expected term. (4) Based on an assumed a dividend yield of zero at the time of grant.

Earnings per share (Tables)

Earnings per share (Tables)	12 Months Ended
	Dec. 31, 2016
Class A Common Stock [Member]
Earnings Per Share Basic [Line Items]
Reconciliation of Numerators and Denominators Used to Compute Basic and Diluted Earnings per Share	The following table sets forth reconciliations of the numerators and denominators used to compute basic and diluted earnings per share of Class A common stock: Basic net income per share: Year ended December 31, 2016 August 6, 2015 through December 31, 2015 Numerator Net income $ 71,247 $ 23,454 Less: net income attributable to non-controlling interests 49,747 19,348 Net income attributable to Planet Fitness, Inc. - basic & diluted $ 21,500 $ 4,106 Denominator Weighted-average shares of Class A common stock outstanding - basic 43,300,288 36,243,557 Effect of dilutive securities: Stock options 1,489 — Restricted stock units 2,908 — Weighted-average shares of Class A common stock outstanding - diluted 43,304,685 36,243,557 Earnings per share of Class A common stock - basic $ 0.50 $ 0.11 Earnings per share of Class A common stock - diluted $ 0.50 $ 0.11

Income taxes (Tables)

Income taxes (Tables)	12 Months Ended
	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Schedule of Income Before Provision for Income Taxes	Income before the provision for income taxes as shown in the accompanying consolidated statements of operations is as follows: Year Ended December 31, 2016 2015 2014 Domestic $ 88,016 $ 48,716 $ 39,534 Foreign 1,892 (1,438 ) (1,056 ) Total income before the provision for income taxes 89,908 47,278 38,478
Schedule of Provision (Benefit) for Income Taxes	The provision (benefit) for income taxes consists of the following: Year Ended December 31, 2016 2015 2014 Current: Federal $ 1,206 $ 686 $ — State 1,428 2,188 1,078 Foreign 421 139 168 Total current tax expense 3,055 3,013 1,246 Deferred: Federal 11,633 5,636 — State 3,755 935 217 Foreign 218 (436 ) (280 ) Total deferred tax expense (benefit) 15,606 6,135 (63 ) Provision for income taxes $ 18,661 $ 9,148 $ 1,183
Schedule of Reconciliation of U.S. Statutory Income Tax Rate to Company's Effective Tax Rate	A reconciliation of the U.S. statutory income tax rate to the Company’s effective tax rate is as follows: Year Ended December 31, 2016 2015 U.S. statutory tax rate 35.0 % 35.0 % State and local taxes, net of federal benefit 4.9 % 6.2 % Rate change impact on deferred taxes (1.4 )% 6.9 % Tax benefit arrangement liability adjustment — % (2.1 )% Foreign tax rate differential (0.3 )% 0.3 % Withholding taxes and other — % 0.2 % Reserve for uncertain tax position 3.1 % — % Income attributable to non-controlling interests (20.5 )% (27.1 )% Effective tax rate 20.8 % 19.4 %
Schedule of Deferred Tax Assets and Liabilities	Details of the Company’s deferred tax assets and liabilities are summarized as follows: Year Ended December 31, 2016 2015 Deferred tax assets: Accrued expense and reserves $ 865 $ 353 Deferred revenue 2,029 1,276 Goodwill and intangible assets 406,447 113,460 Net operating loss 22 716 Other 4,218 2,841 Deferred tax assets $ 413,581 $ 118,646 Deferred tax liabilities: Prepaid expenses (781 ) (674 ) Property and equipment (3,631 ) (614 ) Total deferred tax liabilities $ (4,412 ) $ (1,288 ) Total deferred tax assets and liabilities $ 409,169 $ 117,358 Reported as: Deferred income taxes - non-current assets $ 410,407 $ 117,358 Deferred income taxes - non-current liabilities (1,238 ) — Total deferred tax assets and liabilities $ 409,169 $ 117,358
Summary Of Changes In Unrecognized Tax Positions	A summary of the changes in the Company’s unrecognized tax positions is as follows: Year Ended December 31, 2016 2015 Balance at beginning of year $ 300 $ 300 Increases related to prior year tax positions 2,308 - Balance at end of year $ 2,608 $ 300
Schedule of Future Payments Under Tax Benefit Arrangements	Projected future payments under the tax benefit arrangements are as follows: Amount 2017 $ 11,296 2018 20,253 2019 20,438 2020 20,927 2021 21,491 Thereafter 324,666 Total $ 419,071

Commitments and contingencies (

Commitments and contingencies (Tables)	12 Months Ended
	Dec. 31, 2016
Commitments And Contingencies Disclosure [Abstract]
Schedule of Future Commitments Under Noncancelable Operating Leases	Approximate annual future commitments under noncancelable operating leases as of December 31, 2016 are as follows Amount 2017 $ 13,782 2018 13,342 2019 11,749 2020 10,648 2021 9,178 Thereafter 48,020 Total $ 106,719

Segments (Tables)

Segments (Tables)	12 Months Ended
	Dec. 31, 2016
Segment Reporting [Abstract]
Summary of Financial Information for the Company's Reportable Segments	The tables below summarize the financial information for the Company’s reportable segments for the years ended December 31, 2016, 2015 and 2014. The “Corporate and other” column, as it relates to Segment EBITDA, primarily includes corporate overhead costs, such as payroll and related benefit costs and professional services which are not directly attributable to any individual segment. Year Ended December 31, 2016 2015 2014 Revenue Franchise segment revenue - U.S. $ 114,717 $ 87,299 $ 71,806 Franchise segment revenue - International 1,771 786 — Franchise segment total 116,488 88,085 71,806 Corporate-owned stores segment - U.S. 100,541 95,459 85,022 Corporate-owned stores segment - International 4,180 2,931 19 Corporate-owned stores segment total 104,721 98,390 85,041 Equipment segment - U.S. 157,032 144,062 122,930 Equipment segment total 157,032 144,062 122,930 Total revenue $ 378,241 $ 330,537 $ 279,777 Year Ended December 31, 2016 2015 2014 Segment EBITDA Franchise $ 97,256 $ 66,030 $ 53,109 Corporate-owned stores 40,847 36,070 31,705 Equipment 36,439 31,936 26,447 Corporate and other (26,007 ) (30,051 ) (18,642 ) Total Segment EBITDA $ 148,535 $ 103,985 $ 92,619
Reconciliation of Total Segment EBITDA to Income Before Taxes	The following table reconciles total Segment EBITDA to income before taxes: Year Ended December 31, 2016 2015 2014 Total Segment EBITDA $ 148,535 $ 103,985 $ 92,619 Less: Depreciation and amortization 31,502 32,158 32,341 Other expense 1,371 (275 ) (1,261 ) Income from operations 115,662 72,102 61,539 Interest expense, net (27,125 ) (24,549 ) (21,800 ) Other income (expense) 1,371 (275 ) (1,261 ) Income before income taxes $ 89,908 $ 47,278 $ 38,478
Summary of Company's Assets by Reportable Segment	The following table summarizes the Company’s assets by reportable segment: December 31, 2016 December 31, 2015 Franchise $ 202,580 $ 206,997 Corporate-owned stores 153,761 151,620 Equipment 208,809 208,168 Unallocated 436,292 132,392 Total consolidated assets $ 1,001,442 $ 699,177
Summary of Company's Goodwill by Reportable Segment	The following table summarizes the Company’s goodwill by reportable segment: December 31, 2016 December 31, 2015 Franchise $ 16,938 $ 16,938 Corporate-owned stores 67,377 67,377 Equipment 92,666 92,666 Total consolidated goodwill $ 176,981 $ 176,981

Corporate-owned and franchise41

Corporate-owned and franchisee-owned stores (Tables)	12 Months Ended
	Dec. 31, 2016
Other Industries [Abstract]
Schedule of Changes in Corporate-owned and Franchisee-owned Stores	The following table shows changes in our corporate-owned and franchisee-owned stores for the years ended December 31, 2016, 2015 and 2014: Year Ended December 31, 2016 2015 2014 Franchisee-owned stores: Stores operated at beginning of period 1,066 863 704 New stores opened 195 206 169 Stores debranded, sold or consolidated (1) (6 ) (3 ) (10 ) Stores operated at end of period 1,255 1,066 863 Corporate-owned stores: Stores operated at beginning of period 58 55 45 New stores opened — 3 2 Stores acquired from franchisees — — 8 Stores operated at end of period 58 58 55 Total stores: Stores operated at beginning of period 1,124 918 749 New stores opened 195 209 171 Stores debranded, sold or consolidated (1) (6 ) (3 ) (2 ) Stores operated at end of period 1,313 1,124 918 (1) The term “debrand” refers to a franchisee-owned store whose right to use the Planet Fitness brand and marks has been terminated in accordance with the franchise agreement. We retain the right to prevent debranded stores from continuing to operate as fitness centers. The term “consolidated” refers to the combination of a franchisee’s store with another store located in close proximity with our prior approval. This often coincides with an enlargement, re-equipment and/or refurbishment of the remaining store.

Quarterly financial data (una42

Quarterly financial data (unaudited) (Tables)	12 Months Ended
	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Data	For the quarter ended March 31, 2016 June 30, 2016 September 30, 2016 December 31, 2016 Total revenue $ 83,343 $ 91,472 $ 87,007 $ 116,419 Income from operations 25,610 27,831 26,153 36,068 Net income 16,345 18,091 14,863 21,948 Net income attributable to Planet Fitness, Inc. 3,368 4,132 3,425 10,575 Earnings per share: Class A - Basic $ 0.09 $ 0.11 $ 0.08 $ 0.19 Class A - Diluted $ 0.09 $ 0.11 $ 0.08 $ 0.18 For the quarter ended March 31, 2015 June 30, 2015 September 30, 2015 December 31, 2015 Total revenue $ 76,923 $ 78,952 $ 68,817 $ 105,845 Income from operations 14,304 18,667 10,338 28,793 Net income 8,541 11,612 737 17,240 Net income attributable to Planet Fitness, Inc. 8,425 11,501 (3,893 ) 2,485 Earnings per share (1) August 6 through September 30, 2015 For the quarter ended December 31, 2015 Class A - Basic $ 0.05 $ 0.06 Class A - Diluted $ 0.04 $ 0.06 (1) Represents earnings per share of Class A common stock and weighted-average shares of Class A common stock outstanding for the periods from August 6, 2015 through September 30, 2015 and the quarter ended December 31, 2015, the periods following the recapitalization transactions and IPO (see Note 14).

Business Organization - Additio

Business Organization - Additional Information (Detail) $ / shares in Units, $ in Thousands, Member in Millions	Nov. 22, 2016$ / sharesshares	Sep. 28, 2016$ / sharesshares	Jun. 28, 2016$ / sharesshares	Aug. 11, 2015USD ($)$ / sharesshares	Aug. 05, 2015shares	Nov. 30, 2016$ / sharesshares	Sep. 30, 2016$ / sharesshares	Jun. 30, 2016$ / sharesshares	Dec. 31, 2016MemberStoreStateshares	Dec. 31, 2015USD ($)Storeshares	Nov. 27, 2016	Sep. 27, 2016	Jun. 27, 2016	Dec. 31, 2014Store	Dec. 31, 2013Store
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of members | Member									8.9
Number of owned and franchised locations | Store									1,313	1,124				918	749
Number of states in which entity operates | State									48
Date of formation									Mar. 16, 2015
Proceeds from issuance of Class A common stock sold in initial public offering, net of underwriting discounts and commissions | $										$ 156,946
Continuing LLC Owners [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of economic interest	38.20%						49.40%	54.90%	37.70%		48.50%	54.90%	62.90%
Stock issued during period, shares, conversion of units									1,271,146
Class A Common Stock [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of stock issued during period	15,000,000	8,000,000	11,500,000			15,000,000	8,000,000	11,500,000	1,271,146	10,491,000
Share price | $ / shares	$ 23.22	$ 19.62	$ 16.50			$ 23.22	$ 19.62	$ 16.50
Stock issued during period, shares, conversion of units									24,705,000
Class A Common Stock [Member] | Continuing LLC Owners [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of stock issued during period	10,136,285	5,406,019	7,891,160			10,136,285	5,406,019	7,891,160	1,271,146
Number of shares exchanged									24,704,610	10,491,055
Class A Common Stock [Member] | Direct TSG Investors [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of stock issued during period	4,863,715	2,593,981	3,608,840	5,033,945		4,863,715	2,593,981	3,608,840
Class B Common Stock [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of stock issued during period										(10,491,000)
Number of shares exchanged									1,271,146
Stock issued during period, shares, conversion of units									(24,705,000)
Class B Common Stock [Member] | Continuing LLC Owners [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of stock issued during period					72,602,810
Number of shares exchanged	10,136,285	5,406,019	7,891,160			10,136,285	5,406,019	7,891,160	1,271,146
Pla-Fit Holdings, LLC [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of ownership	100.00%				100.00%		100.00%	100.00%	100.00%		100.00%	100.00%	100.00%
Number of units held by owners	10,136,285	5,406,019	7,891,160			10,136,285	5,406,019	7,891,160	1,271,146
Percentage of economic interest	61.80%						50.60%	45.10%	62.30%		51.50%	45.10%	37.10%
Pla-Fit Holdings, LLC [Member] | Class A Common Stock [Member] | IPO [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of stock issued during period				15,525,000
Share price | $ / shares				$ 16
Pla-Fit Holdings, LLC [Member] | Class A Common Stock [Member] | IPO [Member] | Continuing LLC Owners [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of stock issued during period				10,491,055
Proceeds from issuance of Class A common stock sold in initial public offering, net of underwriting discounts and commissions | $				$ 156,946
Pla-Fit Holdings, LLC [Member] | Class B Common Stock [Member] | Continuing LLC Owners [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of stock issued during period					72,602,810
Planet Intermediate, LLC [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of ownership					100.00%
Planet Fitness Holdings, LLC [Member]
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of ownership					100.00%

Summary of Significant Accoun44

Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2016USD ($)VendorAgreement	Dec. 31, 2015USD ($)Vendor	Dec. 31, 2014USD ($)Vendor
Significant Accounting Policies [Line Items]
Deferred revenue	$ 26,131,000	$ 26,733,000
Membership enrollment fees recognition period	2 years
Membership fees recognition period	12 months
Equipment deposits	$ 2,170,000	5,587,000
Cost of revenue	122,317,000	113,492,000	$ 100,306,000
Selling, general and administrative	50,008,000	55,573,000	35,121,000
Impairment charges	$ 0	0
Income tax positions	Recognized income tax positions are measured at the largest amount that is greater than 50% likely of being realized.
Number of tax receivable agreements | Agreement	2
Applicable tax savings	85.00%
Percentage of remaining tax savings	15.00%
Income tax rate maximum tax liability	3.50%
Direct TSG Investors and TRA Holders [Member]
Significant Accounting Policies [Line Items]
Liability payable under tax benefit obligations	$ 419,071,000
Selling, General and Administrative Expenses [Member]
Significant Accounting Policies [Line Items]
Advertising expenses	8,270,000	9,349,000	7,272,000
Point of Sale System [Member]
Significant Accounting Policies [Line Items]
Cost of revenue	0	1,236,000	3,385,000
Placement Services [Member]
Significant Accounting Policies [Line Items]
Selling, general and administrative	3,974,000	3,452,000	$ 2,743,000
Area Development Agreements [Member]
Significant Accounting Policies [Line Items]
Deferred revenue	10,026,000	10,471,000
Franchise Fees [Member]
Significant Accounting Policies [Line Items]
Deferred revenue	$ 260,000	$ 473,000
Individual Franchise Agreements [Member]
Significant Accounting Policies [Line Items]
Franchisee initial term	10 years
Equipment Purchase [Member] | Supplier Concentration Risk [Member]
Significant Accounting Policies [Line Items]
Number of vendors | Vendor	2	2	2
Equipment Purchase [Member] | Supplier Concentration Risk [Member] | Vendor One [Member]
Significant Accounting Policies [Line Items]
Purchases from vendor	83.00%	79.00%	66.00%
Equipment Purchase [Member] | Supplier Concentration Risk [Member] | Vendor Two [Member]
Significant Accounting Policies [Line Items]
Purchases from vendor	13.00%	18.00%	25.00%
Advertising Purchase [Member] | Supplier Concentration Risk [Member]
Significant Accounting Policies [Line Items]
Number of vendors | Vendor	2	2	2
Advertising Purchase [Member] | Supplier Concentration Risk [Member] | Vendor One [Member]
Significant Accounting Policies [Line Items]
Purchases from vendor	25.00%	49.00%	61.00%
Advertising Purchase [Member] | Supplier Concentration Risk [Member] | Vendor Two [Member]
Significant Accounting Policies [Line Items]
Purchases from vendor	16.00%	0.00%	0.00%
Maximum [Member]
Significant Accounting Policies [Line Items]
Insured amount	$ 250,000,000
Maximum [Member] | Area Development Agreements [Member]
Significant Accounting Policies [Line Items]
Franchisee initial term	10 years
Maximum [Member] | Transfer Fees [Member]
Significant Accounting Policies [Line Items]
Deferred revenue	$ 25,000
Minimum [Member] | Area Development Agreements [Member]
Significant Accounting Policies [Line Items]
Franchisee initial term	5 years
Minimum [Member] | Transfer Fees [Member]
Significant Accounting Policies [Line Items]
Deferred revenue	$ 10,000

Summary of Significant Accoun45

Summary of Significant Accounting Policies - Summary of Estimated Useful Lives of Company's Fixed assets (Detail)	12 Months Ended
	Dec. 31, 2016
Building and Building Improvements [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	20 years
Building and Building Improvements [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	40 years
Computer and Equipment [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	3 years
Furniture and Fixtures [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	5 years
Leasehold Improvements [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	Useful life or term of lease whichever is shorter
Fitness Equipment [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	5 years
Fitness Equipment [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	7 years
Vehicles [Member]
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives	5 years

Summary of Significant Accoun46

Summary of Significant Accounting Policies - Summary of Company's Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Interest Rate Cap [Member] - Fair Value Measurements Recurring - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate caps	$ 306	$ 1,147
Significant Other Observable Inputs (Level 2) [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Interest rate caps	$ 306	$ 1,147

Variable Interest Entities - Ca

Variable Interest Entities - Carrying Value of Variable Interest Entities of Consolidated Financial Statements (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Variable Interest Entity [Line Items]
Assets	$ 7,227	$ 6,681
PF Melville [Member]
Variable Interest Entity [Line Items]
Assets	4,071	3,728
MMR [Member]
Variable Interest Entity [Line Items]
Assets	$ 3,156	$ 2,953

Variable Interest Entities - Ad

Variable Interest Entities - Additional Information (Detail) - USD ($)	Dec. 31, 2016	Dec. 31, 2015
Variable Interest Entity Consolidated Carrying Amount Assets And Liabilities [Abstract]
Maximum obligation of guarantees of leases and debt	$ 1,350,000	$ 1,871,000
Maximum loss exposure Involvement of estimated value	$ 0

Acquisition - Additional Inform

Acquisition - Additional Information (Detail) $ in Thousands	Mar. 31, 2014USD ($)Store	Dec. 31, 2016USD ($)Store	Dec. 31, 2015USD ($)Store	Dec. 31, 2014Store	Dec. 31, 2013Store
Business Acquisition [Line Items]
Number of franchise owned stores | Store		1,313	1,124	918	749
Purchase price consideration before loss incurred	$ 42,931
Business combination, cash payment	39,931
Deferred revenue		$ 26,131	$ 26,733
Business combination, purchase price	$ 41,638
New York [Member]
Business Acquisition [Line Items]
Number of franchise owned stores | Store	8
Equipment Discount [Member]
Business Acquisition [Line Items]
Deferred revenue	$ 3,000	$ 2,796	$ 2,968
Reacquired Franchise Rights [Member]
Business Acquisition [Line Items]
Loss on unfavorable reacquisition of franchise rights	$ 1,293

National Advertising Fund - Add

National Advertising Fund - Additional Information (Detail) - Planet Fitness NAF, LLC [Member] - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Percentage of franchise membership billing revenue	2.00%
Percentage of monthly membership billing contribution	2.00%
Initial administrative fees charged	$ 1,700	$ 1,340	$ 1,010

Property and Equipment - Schedu

Property and Equipment - Schedule of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 92,225	$ 79,664
Accumulated Depreciation	(30,987)	(23,525)
Total	61,238	56,139
Land [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	910	910
Equipment [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	27,283	27,391
Leasehold Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	41,249	38,288
Buildings and Improvements [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,107	5,107
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	3,708	3,030
Other [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	5,673	2,947
Construction in Progress [Member]
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 8,295	$ 1,991

Property and Equipment - Additi

Property and Equipment - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 12,131	$ 11,088	$ 9,138

Goodwill and Intangible Asset53

Goodwill and Intangible Assets - Summary of Goodwill and Intangible Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Goodwill And Intangible Assets [Line Items]
Total intangible assets, Gross carrying amount	$ 347,867	$ 347,867
Gross carrying amount	201,567	201,567
Accumulated amortization	(94,005)	(74,248)
Net carrying Amount	107,562	127,319
Total intangible assets, Net carrying Amount	253,862	273,619
Goodwill, Gross carrying amount	176,981	176,981
Goodwill, Net carrying Amount	176,981	176,981
Trade and Brand Names [Member]
Goodwill And Intangible Assets [Line Items]
Indefinite-lived intangible, Net carrying Amount	$ 146,300	$ 146,300
Customer Relationships [Member]
Goodwill And Intangible Assets [Line Items]
Weighted average amortization period (years)	11 years 1 month 6 days	11 years 1 month 6 days
Gross carrying amount	$ 171,782	$ 171,782
Accumulated amortization	(72,655)	(57,741)
Net carrying Amount	$ 99,127	$ 114,041
Noncompete Agreements [Member]
Goodwill And Intangible Assets [Line Items]
Weighted average amortization period (years)	5 years	5 years
Gross carrying amount	$ 14,500	$ 14,500
Accumulated amortization	(12,027)	(9,127)
Net carrying Amount	$ 2,473	$ 5,373
Favorable Leases [Member]
Goodwill And Intangible Assets [Line Items]
Weighted average amortization period (years)	7 years 6 months	7 years 6 months
Gross carrying amount	$ 2,935	$ 2,935
Accumulated amortization	(1,643)	(1,256)
Net carrying Amount	$ 1,292	$ 1,679
Order Backlog [Member]
Goodwill And Intangible Assets [Line Items]
Weighted average amortization period (years)	4 months 24 days	4 months 24 days
Gross carrying amount	$ 3,400	$ 3,400
Accumulated amortization	$ (3,400)	$ (3,400)
Reacquired Franchise Rights [Member]
Goodwill And Intangible Assets [Line Items]
Weighted average amortization period (years)	5 years 9 months 18 days	5 years 9 months 18 days
Gross carrying amount	$ 8,950	$ 8,950
Accumulated amortization	(4,280)	(2,724)
Net carrying Amount	$ 4,670	$ 6,226

Goodwill and Intangible Asset54

Goodwill and Intangible Assets - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill And Intangible Assets [Line Items]
Changes in carrying amount of goodwill	$ 0	$ 0
Impairment charges	0	0
Amortization of intangible assets	19,757,000	21,543,000	$ 23,698,000
Favorable And Unfavorable Leases [Member]
Goodwill And Intangible Assets [Line Items]
Amortization of intangible assets	$ 386,000	$ 473,000	$ 495,000

Goodwill and Intangible Asset55

Goodwill and Intangible Assets - Summary of Amortization expenses (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
2,017	$ 18,215
2,018	14,583
2,019	14,215
2,020	12,517
2,021	12,422
Thereafter	35,610
Net carrying Amount	$ 107,562	$ 127,319

Long-term Debt - Schedule of Lo

Long-term Debt - Schedule of Long-term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total debt, excluding deferred financing costs	$ 716,654	$ 492,275
Deferred financing costs, net of accumulated amortization	(7,466)	(7,396)
Total debt	709,188	484,879
Current portion of long-term debt and line of credit	7,185	5,100
Long-term debt, net of current portion	702,003	479,779
Term Loan B [Member]
Debt Instrument [Line Items]
Total debt, excluding deferred financing costs	$ 716,654	$ 492,275

Long-term Debt - Schedule of 57

Long-term Debt - Schedule of Long-term Debt (Parenthetical) (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument maturity date	Mar. 31, 2019	Mar. 31, 2019
Total rate - base plus spread	6.00%	5.50%
Term Loan B [Member]
Debt Instrument [Line Items]
Debt instrument maturity date	Mar. 31, 2021	Mar. 31, 2021
Total rate - base plus spread	4.33%	4.75%

Long-term Debt - Additional Inf

Long-term Debt - Additional Information (Detail) - USD ($)	Nov. 10, 2016	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Debt Instrument [Line Items]
Credit facility expiration period			5 years
Credit facility maximum borrowing capacity			$ 430,000,000
Funds used to pay dividend	$ 271,011,000	$ 140,000,000	173,900,000	$ 169,282,000
Debt instrument third party fee				3,001,000
Loss on extinguishment of debt				606,000		$ 4,697,000
Term Loan B [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 718,450,000	$ 510,000,000	390,000,000
Decrease in interest rate margin for term loan borrowings	(0.25%)
Credit facility quarterly principal installment payment				$ 1,796,000
Debt instrument maturity date				Mar. 31, 2021	Mar. 31, 2021
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Credit facility maximum borrowing capacity	$ 75,000,000		$ 40,000,000
Unused portion of credit facility				$ 75,000,000
Debt instrument maturity date				Mar. 31, 2019	Mar. 31, 2019
Amended Credit Facility [Member]
Debt Instrument [Line Items]
Capitalized and deferred financing costs				$ 2,219,000
Amended Credit Facility [Member] | Other Expense [Member]
Debt Instrument [Line Items]
Debt instrument third party fee				3,001,000
Amended Credit Facility [Member] | Interest Expense [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt				$ 606,000

Long-term Debt - Schedule of Fu

Long-term Debt - Schedule of Future Annual Payments of Long-term Debt (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
2,017	$ 7,185
2,018	7,185
2,019	7,185
2,020	7,185
2,021	687,914
Total	$ 716,654	$ 492,275

Derivative Instruments and He60

Derivative Instruments and Hedging Activities - Additional Information (Detail)	1 Months Ended		3 Months Ended	12 Months Ended
	Sep. 30, 2015USD ($)Cap	Sep. 30, 2014USD ($)	Mar. 31, 2014USD ($)	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivative, interest rate cap floor				1.50%
Unrealized loss on interest rate caps, net of tax				$ (78,000)	$ (1,388,000)	$ (662,000)
Interest Rate Swap Agreements [Member] | Interest Expense [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Loss related to terminated swap agreements						248,000
Interest Rate Swap Agreements [Member] | Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] | Reclassification out of Accumulated Other Comprehensive Income [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Interest expense			$ 92,000
Interest Rate Cap [Member]
Derivative Instruments And Hedging Activities Disclosures [Line Items]
Derivative, premium payments	$ 880,000	$ 2,373,000
Derivative, notional amount		$ 194,000,000		194,000,000
Derivative, inception date	Sep. 30, 2015	Sep. 30, 2014
Number of additional caps | Cap	2
Derivative, maturity date	Sep. 30, 2018	Sep. 29, 2017
Interest rate caps				306,000	1,147,000
Unrealized loss on interest rate caps, net of tax				$ (78,000)	$ (1,388,000)	$ (662,000)

Deferred Revenue - Schedule of

Deferred Revenue - Schedule of Deferred Revenue (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Mar. 31, 2014
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 26,131	$ 26,733
Deferred revenue, long-term portion	8,351	12,016
Deferred revenue, current portion	17,780	14,717
Prepaid Membership Fees [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	5,034	5,134
Enrollment Fees [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	1,240	1,555
Equipment Discount [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	2,796	2,968	$ 3,000
Annual Membership Fees [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	6,775	6,132
Area Development and Franchise Fees [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 10,286	$ 10,944

Deferred Revenue - Additional I

Deferred Revenue - Additional Information (Detail) $ in Thousands	1 Months Ended	12 Months Ended
	Dec. 31, 2016USD ($)Store	Dec. 31, 2016USD ($)	Dec. 31, 2015USD ($)
Deferred Revenue Arrangement [Line Items]
Equipment deposits	$ 2,170	$ 2,170	$ 5,587
Deferred revenue expected recognition period		12 months
Equipment Discount [Member]
Deferred Revenue Arrangement [Line Items]
Write-off deferred revenue	$ 1,754
Number of franchisee owned- stores | Store	8

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Due from related parties, current portion	$ 2,864	$ 4,940
Revenue from Related Parties	3,098	2,918	$ 4,444
Direct TSG Investors [Member]
Related Party Transaction [Line Items]
Payment for management fee	0	1,899	$ 1,211
Liability payable under tax benefit obligations	419,071
Direct TSG Investors [Member] | Management Agreement Termination [Member]
Related Party Transaction [Line Items]
Management agreement termination fee		1,000
Area Development Agreements [Member]
Related Party Transaction [Line Items]
Revenue from Related Parties	$ 422	$ 352

Related Party Transactions - Sc

Related Party Transactions - Schedule of Related Party Transactions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Related Party Transaction [Line Items]
Total revenue from related parties	$ 3,098	$ 2,918	$ 4,444
Franchise [Member]
Related Party Transaction [Line Items]
Total revenue from related parties	1,760	1,232	733
Equipment [Member]
Related Party Transaction [Line Items]
Total revenue from related parties	$ 1,338	$ 1,686	$ 3,711

Stockholder's Equity - Addition

Stockholder's Equity - Additional Information (Detail) - USD ($)	Dec. 05, 2016	Nov. 22, 2016	Sep. 28, 2016	Jun. 28, 2016	Aug. 11, 2015	Aug. 05, 2015	Jun. 22, 2015	Nov. 30, 2016	Sep. 30, 2016	Jun. 30, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Aug. 06, 2015
Class Of Stock [Line Items]
Convertible stock, conversion description											Following the Merger and the Reclassification, the Company and the Continuing LLC Owners entered into an exchange agreement under which the Continuing LLC Owners (or certain permitted transferees thereof) have the right, from time to time and subject to the terms of the exchange agreement, to exchange their Holdings Units, along with a corresponding number of shares of Class B common stock, for shares of Class A common stock (or cash at the option of the Company) on a one-for-one basis, subject to customary conversion rate adjustments for stock splits, stock dividends, reclassifications and similar transactions.
Proceeds from sale of shares											$ 136,000
Common stock dividends declared											169,282,000
Dividend equivalent paid to members of Pla-Fit Holdings											$ 101,729,000	$ 140,000,000	$ 173,900,000
Pla-Fit Holdings, LLC [Member]
Class Of Stock [Line Items]
Number of units held by owners		10,136,285	5,406,019	7,891,160				10,136,285	5,406,019	7,891,160	1,271,146
Continuing LLC Owners [Member]
Class Of Stock [Line Items]
Exchanges of Class B common stock, shares											1,271,146
Continuing LLC Owners [Member] | IPO and Secondary Offering [Member]
Class Of Stock [Line Items]
Percentage of economic interest											37.70%
Number of units held by owners											37,184,925
Class A Common Stock [Member]
Class Of Stock [Line Items]
Number of stock issued during period		15,000,000	8,000,000	11,500,000				15,000,000	8,000,000	11,500,000	1,271,146	10,491,000
Common stock, shares outstanding					36,597,985						61,314,000	36,598,000		0
Share price		$ 23.22	$ 19.62	$ 16.50				$ 23.22	$ 19.62	$ 16.50
Proceeds from sale of shares		$ 0	$ 0	$ 0
Exchanges of Class B common stock, shares											24,705,000
Common stock dividends declared											$ 169,282,000
Common stock dividends paid, per share											$ 2.78
Common stock dividends declared, date											Nov. 10, 2016
Common stock dividends record, date											Nov. 22, 2016
Common stock dividends paid, date											Dec. 5, 2016
Class A Common Stock [Member] | Pla-Fit Holdings, LLC [Member]
Class Of Stock [Line Items]
Reimbursement of IPO expenses												$ 7,697,000
Class A Common Stock [Member] | Pla-Fit Holdings, LLC [Member] | IPO [Member]
Class Of Stock [Line Items]
Number of stock issued during period					15,525,000
Share price					$ 16
Class A Common Stock [Member] | Direct TSG Investors [Member]
Class Of Stock [Line Items]
Number of shares converted							26,106,930
Number of stock issued during period		4,863,715	2,593,981	3,608,840	5,033,945			4,863,715	2,593,981	3,608,840
Class A Common Stock [Member] | Direct TSG Investors [Member] | IPO and Secondary Offering [Member]
Class Of Stock [Line Items]
Number of stock issued during period											10,006,450
Percentage of economic interest											10.20%
Percentage of voting power											10.20%
Class A Common Stock [Member] | Continuing LLC Owners [Member]
Class Of Stock [Line Items]
Number of stock issued during period		10,136,285	5,406,019	7,891,160				10,136,285	5,406,019	7,891,160	1,271,146
Number of shares exchanged											24,704,610	10,491,055
Class A Common Stock [Member] | Continuing LLC Owners [Member] | Pla-Fit Holdings, LLC [Member] | IPO [Member]
Class Of Stock [Line Items]
Number of stock issued during period					10,491,055
Aggregate amount of units issued					$ 156,946,000
Class A Common Stock [Member] | Investor | IPO and Secondary Offering [Member]
Class Of Stock [Line Items]
Number of stock issued during period											51,307,348
Percentage of economic interest											52.10%
Percentage of voting power											52.10%
Class B Common Stock [Member]
Class Of Stock [Line Items]
Number of stock issued during period												(10,491,000)
Common stock, shares outstanding											37,185,000	62,112,000		0
Number of shares exchanged											1,271,146
Exchanges of Class B common stock, shares											(24,705,000)
Class B Common Stock [Member] | Continuing LLC Owners [Member]
Class Of Stock [Line Items]
Number of stock issued during period						72,602,810
Common stock dividend and voting rights description											The shares of Class B common stock have no rights to dividends or distributions, whether in cash or stock, but entitle the holder to one vote per share on matters presented to stockholders of the Company.
Number of shares exchanged		10,136,285	5,406,019	7,891,160				10,136,285	5,406,019	7,891,160	1,271,146
Class B Common Stock [Member] | Continuing LLC Owners [Member] | IPO and Secondary Offering [Member]
Class Of Stock [Line Items]
Percentage of voting power											37.70%
Number of units held by owners											37,184,925
Class B Common Stock [Member] | Continuing LLC Owners [Member] | Pla-Fit Holdings, LLC [Member]
Class Of Stock [Line Items]
Number of stock issued during period						72,602,810
Holdings Units [Member]
Class Of Stock [Line Items]
Common stock dividends paid, per share	$ 2.78
Dividend equivalent paid to members of Pla-Fit Holdings	$ 101,729,000
Accrued dividend equivalents for future payments to holders of unvested share awards											$ 3,899,000
Merger Agreement [Member] | Class A Common Stock [Member] | Direct TSG Investors [Member]
Class Of Stock [Line Items]
Number of shares converted							26,106,930

Equity-Based Compensation - Add

Equity-Based Compensation - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	12 Months Ended
	Aug. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, compensation expense		$ 784	$ 4,371
Stock options, expected recognition, weighted-average period		1 year
Weighted-average grant date fair value of stock options granted		$ 6.44
Selling, general and administrative		$ 50,008	55,573	$ 35,121
Unrecognized compensation expense related to unvested stock options, including an estimate for pre-vesting forfeitures			$ 1,576
Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, weighted-average grant date fair value		$ 19.02	$ 18.38
Share based compensation, shares vested		2,720
Selling, general and administrative		$ 98	$ 26
Share based compensation, shares granted		2,447
Weighted-average grant date fair value of restricted stock granted		$ 20.43
Unrecognized compensation expense related to unvested RSUs, including an estimate for pre-vesting forfeitures		$ 76
Stock Options [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options, expected recognition, weighted-average period		2 years 1 month 6 days
Selling, general and administrative		$ 846	$ 131
Class M Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, shares vested			10.737
Class B Common Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, shares issued			4,238,338
Share based compensation, weighted-average grant date fair value			$ 1.52
Holdings Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, compensation expense		$ 337
Share based compensation, shares vested		22,527
Class A Common Stock [Member] | Restricted Stock Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, shares granted		2,447
2013 Equity Incentive Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, total unrecognized compensation		$ 246
Stock options, expected recognition, weighted-average period		1 year 4 months 24 days
2013 Equity Incentive Plan [Member] | Class M Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, vest equally over a period		5 years
Contractual term in years of stock option awards		10 years
2013 Equity Incentive Plan [Member] | Class M Units [Member] | Tranche One [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting rights, percentage		80.00%
2013 Equity Incentive Plan [Member] | Class M Units [Member] | IPO [Member] | Tranche One [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Award vesting rights, percentage		20.00%
2015 Omnibus Incentive Plan [Member] | Maximum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, vest equally over a period	10 years
Share based compensation, options granted to purchase up to	7,896,800
2015 Omnibus Incentive Plan [Member] | Minimum [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share based compensation, vest equally over a period	4 years

Equity-Based Compensation - Fai

Equity-Based Compensation - Fair Value of Stock Option Awards Determined on Grant Date Using Monte Carlo Valuation Model (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)	6 years 3 months	6 years 3 months
Expected volatility		35.40%
Class M Units [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Expected term (years)			1 year 8 months 12 days
Expected volatility			36.80%
Risk-free interest rate			0.40%

Equity-Based Compensation - Sum

Equity-Based Compensation - Summary of Unvested Holdings Unit Activity (Detail) - Unvested Holdings Units [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Units Outstanding at beginning of period | shares	1,805,783
Units forfeited | shares	(126,482)
Units vested | shares	(654,285)
Units Outstanding at end of period | shares	1,025,016
Weighted average grant date fair value, Outstanding at beginning of period | $ / shares	$ 1.52
Weighted average grant date fair value, Units forfeited | $ / shares	1.52
Weighted average grant date fair value, Units vested | $ / shares	1.52
Weighted average grant date fair value, Outstanding at end of period | $ / shares	$ 1.52
Weighted average remaining contractual term (years), Outstanding at end of period	1 year 4 months 24 days
Aggregate intrinsic value, Outstanding at end of period | $	$ 20,603

Equity-Based Compensation - F69

Equity-Based Compensation - Fair Value of Stock Option Awards Determined on Grant Date Using Black-Scholes Valuation Model (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Expected term (years)	6 years 3 months	6 years 3 months
Expected volatility, Minimum	33.20%
Expected volatility, Maximum	34.40%
Risk-free interest rate, Minimum	1.31%	1.70%
Risk-free interest rate, Maximum	1.76%	1.82%
Expected volatility		35.40%

Equity-Based Compensation - S70

Equity-Based Compensation - Summary of Stock Option Activity (Detail) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)$ / sharesshares
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Options, Outstanding at beginning of period | shares	108,270
Stock Options, Granted | shares	309,683
Stock Options, Exercised | shares	(8,483)
Stock Options, Forfeited | shares	(5,000)
Stock Options, Outstanding at end of period | shares	404,470
Stock Options, Vested or expected to vest | shares	392,755
Stock Option, Exercisable | shares	17,324
Weighted average exercise price, Outstanding at beginning of period | $ / shares	$ 16.15
Weighted average exercise price, Granted | $ / shares	17.90
Weighted average exercise price, Exercised | $ / shares	16
Weighted average exercise price, Forfeited | $ / shares	16
Weighted average exercise price, Outstanding at end of period | $ / shares	17.49
Weighted average exercise price, Vested or expected to vest | $ / shares	17.47
Weighted average exercise price, Exercisable | $ / shares	$ 16.23
Weighted average remaining contractual term (years), Outstanding at end of period	9 years 2 months 12 days
Weighted average remaining contractual term (years), Vested or expected to vest	9 years 2 months 12 days
Weighted average remaining contractual term (years), Exercisable	8 years 7 months 6 days
Aggregate intrinsic value, Outstanding | $	$ 1,055
Aggregate intrinsic value, Vested or expected to vest | $	1,032
Aggregate intrinsic value, Exercisable | $	$ 67

Equity-Based Compensation - S71

Equity-Based Compensation - Summary of Restricted Stock Units Activity (Detail) - Restricted Stock Units [Member] $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2016USD ($)$ / sharesshares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Units Outstanding at beginning of period | shares	8,160
Units granted | shares	2,447
Units vested | shares	(2,720)
Units Outstanding at end of period | shares	7,887
Weighted average grant date fair value, Outstanding at beginning of period | $ / shares	$ 18.38
Weighted average grant date fair value, Units granted | $ / shares	20.43
Weighted average grant date fair value, Units vested | $ / shares	18.38
Weighted average grant date fair value, Outstanding at end of period | $ / shares	$ 19.02
Weighted average remaining contractual term (years), Outstanding at end of period	1 year
Aggregate intrinsic value, Outstanding at end of period | $	$ 159

Earnings per share - Additional

Earnings per share - Additional Information (Detail) - shares	5 Months Ended	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2016	Aug. 11, 2015	Aug. 06, 2015
Stock Options [Member]
Earnings Per Share Diluted [Line Items]
Anti-dilutive securities excluded from the calculation of earnings per share	108,270	208,452
Restricted Stock Units [Member]
Earnings Per Share Diluted [Line Items]
Anti-dilutive securities excluded from the calculation of earnings per share	8,160
Class A Common Stock [Member]
Earnings Per Share Diluted [Line Items]
Common stock, shares outstanding	36,598,000	61,314,000	36,597,985	0
Class B Common Stock [Member]
Earnings Per Share Diluted [Line Items]
Common stock, shares outstanding	62,112,000	37,185,000		0
Class B Common Stock [Member] | Continuing LLC Owners Exchange Agreement
Earnings Per Share Diluted [Line Items]
Anti-dilutive securities excluded from the calculation of earnings per share	62,466,183	55,305,992

Earnings per share - Reconcilia

Earnings per share - Reconciliation of Numerators and Denominators Used to Compute Basic and Diluted Earnings per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	2 Months Ended	3 Months Ended								5 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Numerator
Net income including non-controlling interests		$ 21,948	$ 14,863	$ 18,091	$ 16,345	$ 17,240	$ 737	$ 11,612	$ 8,541	$ 23,454	$ 71,247		$ 38,130		$ 37,295
Less: net income attributable to non-controlling interests										19,348	49,747		19,612		487
Net income attributable to Planet Fitness, Inc.		$ 10,575	$ 3,425	$ 4,132	$ 3,368	$ 2,485	$ (3,893)	$ 11,501	$ 8,425	$ 4,106	$ 21,500		$ 18,518		$ 36,808
Stock Options [Member]
Effect of dilutive securities:
Weighted-average shares outstanding adjustment											1,489
Restricted Stock Units [Member]
Effect of dilutive securities:
Weighted-average shares outstanding adjustment											2,908
Class A Common Stock [Member]
Denominator
Weighted-average shares of Class A common stock outstanding - basic										36,243,557	43,300,288	[1]	36,244,000	[1]
Effect of dilutive securities:
Weighted-average shares of Class A common stock outstanding - diluted										36,243,557	43,304,685	[1]	36,244,000	[1]
Earnings per share of Class A common stock - basic	$ 0.05	$ 0.19	$ 0.08	$ 0.11	$ 0.09	$ 0.06				$ 0.11	$ 0.50	[1]	$ 0.11	[1]
Earnings per share of Class A common stock - diluted	$ 0.04	$ 0.18	$ 0.08	$ 0.11	$ 0.09	$ 0.06				$ 0.11	$ 0.50	[1]	$ 0.11	[1]
[1]	For the year ended December 31, 2015, 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 December 31, 2015, the period following the recapitalization transactions and IPO (see Note 14).

Income Taxes - Schedule of Inco

Income Taxes - Schedule of Income Before Provision for Income Taxes (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Income Tax Disclosure [Abstract]
Domestic	$ 88,016	$ 48,716	$ 39,534
Foreign	1,892	(1,438)	(1,056)
Total income before the provision for income taxes	$ 89,908	$ 47,278	$ 38,478

Income Taxes - Schedule of Prov

Income Taxes - Schedule of Provision (Benefit) for Income Taxes Expenses (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Current:
Federal	$ 1,206	$ 686
State	1,428	2,188	$ 1,078
Foreign	421	139	168
Total current tax expense	3,055	3,013	1,246
Deferred:
Federal	11,633	5,636
State	3,755	935	217
Foreign	218	(436)	(280)
Total deferred tax expense (benefit)	15,606	6,135	(63)
Provision for income taxes	$ 18,661	$ 9,148	$ 1,183

Income Taxes - Schedule of Reco

Income Taxes - Schedule of Reconciliation of U.S. Statutory Income Tax Rate to Company's Effective Tax Rate (Detail)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
U.S. statutory tax rate	35.00%	35.00%
State and local taxes, net of federal benefit	4.90%	6.20%
Rate change impact on deferred taxes	(1.40%)	6.90%
Tax benefit arrangement liability adjustment		(2.10%)
Foreign tax rate differential	(0.30%)	0.30%
Withholding taxes and other		0.20%
Reserve for uncertain tax position	3.10%
Income attributable to non-controlling interests	(20.50%)	(27.10%)
Effective tax rate	20.80%	19.40%

Income Taxes - Additional infor

Income Taxes - Additional information (Detail)	12 Months Ended
	Dec. 31, 2016USD ($)Agreementshares	Dec. 31, 2015USD ($)shares
Tax Credit Carryforward [Line Items]
Effective income tax rate	39.50%	39.40%
Effective income tax rate reconciliation noncontrolling interest	2.00%	2.50%
Undistributed earnings of foreign operations	$ 0	$ 0
Unrecognized tax benefits, Current period tax positions	2,773,000
Unrecognized tax benefits including interest	465,000
Unrecognized tax benefits related with acquisition	2,773,000
Unrecognized tax benefits, Income tax penalties and interest expense	465,000
Total liability related to uncertain tax positions	2,608,000	300,000
Portion of unrecognized tax benefit, if recognized would reduce income tax expense	2,608,000
Decrease in next twelve months for unrecognized tax benefits	$ 2,608,000
Number of tax receivable agreements | Agreement	2
Applicable tax savings	85.00%
Percentage of remaining tax savings	15.00%
Income tax rate maximum tax liability	3.50%
Other income (expense) reflecting change in tax benefit obligation	$ (72,000)	2,549,000
Deferred tax asset	413,581,000	118,646,000
Deferred tax liability	4,412,000	1,288,000
Tax benefit obligation	419,071,000	140,191,000
Continuing LLC Owners [Member]
Tax Credit Carryforward [Line Items]
Decrease in deferred tax assets	(25,046,000)	(35,661,000)
Deferred tax asset	332,471,000	154,335,000
Deferred tax liability	$ 285,730,000	$ 136,950,000
Class A Common Stock [Member] | Continuing LLC Owners [Member]
Tax Credit Carryforward [Line Items]
Number of shares exchanged | shares	24,704,610	10,491,055
Canada [Member]
Tax Credit Carryforward [Line Items]
Net operating loss carryforwards	$ 82,000
Operating loss carryforwards, expiration date	2,034
Valuation allowance recorded	$ 0

Income Taxes - Schedule of Defe

Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Deferred tax assets:
Accrued expense and reserves	$ 865	$ 353
Deferred revenue	2,029	1,276
Goodwill and intangible assets	406,447	113,460
Net operating loss	22	716
Other	4,218	2,841
Deferred tax assets	413,581	118,646
Deferred tax liabilities:
Prepaid expenses	(781)	(674)
Property and equipment	(3,631)	(614)
Total deferred tax liabilities	(4,412)	(1,288)
Total deferred tax assets	409,169	117,358
Reported as:
Deferred income taxes - non-current assets	410,407	117,358
Deferred income taxes - non-current liabilities	(1,238)
Total deferred tax assets	$ 409,169	$ 117,358

Income Taxes - Summary Of Chang

Income Taxes - Summary Of Changes In Unrecognized Tax Positions (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Balance at beginning of year	$ 300	$ 300
Increases related to prior year tax positions	2,308	0
Balance at end of year	$ 2,608	$ 300

Income Taxes - Schedule of Futu

Income Taxes - Schedule of Future Payments Under Tax Benefit Arrangements (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
2,017	$ 11,296
2,018	20,253
2,019	20,438
2,020	20,927
2,021	21,491
Thereafter	324,666
Total	$ 419,071	$ 140,191

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Commitment And Contingencies [Line Items]
Rental expense	$ 19,203,000	$ 18,186,000	$ 16,980,000
Maximum obligation of guarantees of leases and debt	1,350,000	1,871,000
Accrued potential obligation recorded under guaranty arrangement	0	$ 0
Advertising Purchase Commitment [Member]
Commitment And Contingencies [Line Items]
Purchase commitments	23,805,000
Equipment Purchase Commitment [Member]
Commitment And Contingencies [Line Items]
Purchase commitments	$ 9,687,000

Commitments and Contingencies82

Commitments and Contingencies - Schedule of Future Commitments Under Noncancelable Operating Leases (Detail) $ in Thousands	Dec. 31, 2016USD ($)
Commitments And Contingencies Disclosure [Abstract]
2,017	$ 13,782
2,018	13,342
2,019	11,749
2,020	10,648
2,021	9,178
Thereafter	48,020
Total	$ 106,719

Retirement Plan - Additional In

Retirement Plan - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Compensation And Retirement Disclosure [Abstract]
Percentage of employer matching contribution	100.00%
Maximum percentage of employee contribution	4.00%
Total employer matching contributions expense	$ 484	$ 384	$ 211

Segments - Additional Informati

Segments - Additional Information (Detail)	3 Months Ended								12 Months Ended
	Dec. 31, 2016USD ($)	Sep. 30, 2016USD ($)	Jun. 30, 2016USD ($)	Mar. 31, 2016USD ($)	Dec. 31, 2015USD ($)	Sep. 30, 2015USD ($)	Jun. 30, 2015USD ($)	Mar. 31, 2015USD ($)	Dec. 31, 2016USD ($)Segment	Dec. 31, 2015USD ($)	Dec. 31, 2014USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | Segment									3
Number of operating segments | Segment									0
Description of factors used to identify entity's reportable segments									No operating segments aggregated to arrive at the Company’s reportable segments
Revenue	$ 116,419,000	$ 87,007,000	$ 91,472,000	$ 83,343,000	$ 105,845,000	$ 68,817,000	$ 78,952,000	$ 76,923,000	$ 378,241,000	$ 330,537,000	$ 279,777,000
Franchise [Member]
Segment Reporting Information [Line Items]
Revenue									116,488,000	88,085,000	71,806,000
Franchise [Member] | International [Member]
Segment Reporting Information [Line Items]
Revenue									1,771,000	786,000
Franchise [Member] | Placement Services [Member]
Segment Reporting Information [Line Items]
Revenue									10,513,000	9,806,000	8,450,000
Corporate-owned Stores [Member]
Segment Reporting Information [Line Items]
Revenue									104,721,000	98,390,000	85,041,000
Corporate-owned Stores [Member] | International [Member]
Segment Reporting Information [Line Items]
Revenue									4,180,000	2,931,000	$ 19,000
Long-lived assets	$ 2,795,000				$ 3,149,000				2,795,000	$ 3,149,000
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue									$ 0

Segments - Summary of Financial

Segments - Summary of Financial Information for the Company's Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Revenue	$ 116,419	$ 87,007	$ 91,472	$ 83,343	$ 105,845	$ 68,817	$ 78,952	$ 76,923	$ 378,241	$ 330,537	$ 279,777
Total Segment EBITDA									148,535	103,985	92,619
Corporate And Other Non Segment [Member]
Segment Reporting Information [Line Items]
Total Segment EBITDA									(26,007)	(30,051)	(18,642)
Franchise [Member]
Segment Reporting Information [Line Items]
Revenue									116,488	88,085	71,806
Franchise [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Segment EBITDA									97,256	66,030	53,109
Franchise [Member] | US [Member]
Segment Reporting Information [Line Items]
Revenue									114,717	87,299	71,806
Franchise [Member] | International [Member]
Segment Reporting Information [Line Items]
Revenue									1,771	786
Corporate-owned Stores [Member]
Segment Reporting Information [Line Items]
Revenue									104,721	98,390	85,041
Corporate-owned Stores [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Segment EBITDA									40,847	36,070	31,705
Corporate-owned Stores [Member] | US [Member]
Segment Reporting Information [Line Items]
Revenue									100,541	95,459	85,022
Corporate-owned Stores [Member] | International [Member]
Segment Reporting Information [Line Items]
Revenue									4,180	2,931	19
Equipment [Member]
Segment Reporting Information [Line Items]
Revenue									157,032	144,062	122,930
Equipment [Member] | Operating Segments [Member]
Segment Reporting Information [Line Items]
Total Segment EBITDA									36,439	31,936	26,447
Equipment [Member] | US [Member]
Segment Reporting Information [Line Items]
Revenue									$ 157,032	$ 144,062	$ 122,930

Segments - Reconciliation of To

Segments - Reconciliation of Total Segment EBITDA to Income Before Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting [Abstract]
Total Segment EBITDA									$ 148,535	$ 103,985	$ 92,619
Depreciation and amortization									31,502	32,158	32,341
Other income (expense)									1,371	(275)	(1,261)
Income from operations	$ 36,068	$ 26,153	$ 27,831	$ 25,610	$ 28,793	$ 10,338	$ 18,667	$ 14,304	115,662	72,102	61,539
Interest expense, net									(27,125)	(24,549)	(21,800)
Income before income taxes									$ 89,908	$ 47,278	$ 38,478

Segments - Summary of Company's

Segments - Summary of Company's Assets by Reportable Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	$ 1,001,442	$ 699,177
Operating Segments [Member] | Franchise [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	202,580	206,997
Operating Segments [Member] | Corporate-owned Stores [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	153,761	151,620
Operating Segments [Member] | Equipment [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	208,809	208,168
Unallocated [Member]
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	$ 436,292	$ 132,392

Segments - Summary of Company88

Segments - Summary of Company's Goodwill by Reportable Segment (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Segment Reporting Other Significant Reconciling Item [Line Items]
Goodwill, Net carrying Amount	$ 176,981	$ 176,981
Franchise [Member]
Segment Reporting Other Significant Reconciling Item [Line Items]
Goodwill, Net carrying Amount	16,938	16,938
Corporate-owned Stores [Member]
Segment Reporting Other Significant Reconciling Item [Line Items]
Goodwill, Net carrying Amount	67,377	67,377
Equipment [Member]
Segment Reporting Other Significant Reconciling Item [Line Items]
Goodwill, Net carrying Amount	$ 92,666	$ 92,666

Corporate-owned and Franchise89

Corporate-owned and Franchisee-owned Stores - Schedule of Changes in Corporate-owned and Franchisee-owned Stores (Detail) - Store		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Franchisor Disclosure [Line Items]
Stores operated at beginning of period		1,124	918	749
New stores opened		195	209	171
Stores debranded, sold or consolidated	[1]	(6)	(3)	(2)
Stores operated at end of period		1,313	1,124	918
Franchisee-Owned Stores [Member]
Franchisor Disclosure [Line Items]
Stores operated at beginning of period		1,066	863	704
New stores opened		195	206	169
Stores debranded, sold or consolidated	[1]	(6)	(3)	(10)
Stores operated at end of period		1,255	1,066	863
Corporate-Owned Stores [Member]
Franchisor Disclosure [Line Items]
Stores operated at beginning of period		58	55	45
New stores opened			3	2
Stores acquired from franchisees				8
Stores operated at end of period		58	58	55
[1]	The term “debrand” refers to a franchisee-owned store whose right to use the Planet Fitness brand and marks has been terminated in accordance with the franchise agreement. We retain the right to prevent debranded stores from continuing to operate as fitness centers. The term “consolidated” refers to the combination of a franchisee’s store with another store located in close proximity with our prior approval. This often coincides with an enlargement, re-equipment and/or refurbishment of the remaining store.

Quarterly Financial Data (Una90

Quarterly Financial Data (Unaudited) - Schedule of Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands	2 Months Ended	3 Months Ended								5 Months Ended	12 Months Ended
	Sep. 30, 2015	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2015	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Quarterly Financial Information [Line Items]
Total revenue		$ 116,419	$ 87,007	$ 91,472	$ 83,343	$ 105,845	$ 68,817	$ 78,952	$ 76,923		$ 378,241		$ 330,537		$ 279,777
Income from operations		36,068	26,153	27,831	25,610	28,793	10,338	18,667	14,304		115,662		72,102		61,539
Net income		21,948	14,863	18,091	16,345	17,240	737	11,612	8,541	$ 23,454	71,247		38,130		37,295
Net income attributable to Planet Fitness, Inc.		$ 10,575	$ 3,425	$ 4,132	$ 3,368	$ 2,485	$ (3,893)	$ 11,501	$ 8,425	$ 4,106	$ 21,500		$ 18,518		$ 36,808
Class A Common Stock [Member]
Earnings per share:
Class A - Basic	$ 0.05	$ 0.19	$ 0.08	$ 0.11	$ 0.09	$ 0.06				$ 0.11	$ 0.50	[1]	$ 0.11	[1]
Class A - Diluted	$ 0.04	$ 0.18	$ 0.08	$ 0.11	$ 0.09	$ 0.06				$ 0.11	$ 0.50	[1]	$ 0.11	[1]
[1]	For the year ended December 31, 2015, 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 December 31, 2015, the period following the recapitalization transactions and IPO (see Note 14).