Planet Fitness (PLNT) 10-Q 8 Nov 19 2019 Q3 Quarterly report Financial data

Cover Page

Cover Page - shares	9 Months Ended
	Sep. 30, 2019	Nov. 01, 2019
Entity Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Sep. 30, 2019
Document Transition Report	false
Entity File Number	001-37534
Entity Registrant Name	PLANET FITNESS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	38-3942097
Entity Address, Address Line One	4 Liberty Lane West
Entity Address, City or Town	Hampton
Entity Address, State or Province	NH
Entity Address, Postal Zip Code	03842
City Area Code	603
Local Phone Number	750-0001
Title of 12(b) Security	Class A common stock, $0.0001 Par Value
Trading Symbol	PLNT
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Amendment Flag	false
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Entity Central Index Key	0001637207
Current Fiscal Year End Date	--12-31
Class A Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		81,792,537
Class B Common Stock
Entity Information [Line Items]
Entity Common Stock, Shares Outstanding		8,561,920

Condensed consolidated balance

Condensed consolidated balance sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 219,752	$ 289,431
Restricted cash	30,499	30,708
Accounts receivable, net of allowance for bad debts of $37 and $84 at September 30, 2019 and December 31, 2018, respectively	29,398	38,960
Inventory	2,612	5,122
Restricted assets – national advertising fund	657	0
Prepaid expenses	8,649	4,947
Other receivables	9,232	12,548
Other current assets	5,471	6,824
Total current assets	306,270	388,540
Property and equipment, net of accumulated depreciation of $70,083, as of September 30, 2019 and $53,086 as of December 31, 2018	131,454	114,367
Right-of-use assets, net	127,746
Intangible assets, net	227,575	234,330
Goodwill	206,752	199,513
Deferred income taxes	418,745	414,841
Other assets, net	1,690	1,825
Total assets	1,420,232	1,353,416
Current liabilities:
Current maturities of long-term debt	12,000	12,000
Accounts payable	23,037	30,428
Accrued expenses	25,737	32,384
Equipment deposits	8,566	7,908
Restricted liabilities – national advertising fund	657	0
Deferred revenue, current	24,638	23,488
Payable pursuant to tax benefit arrangements, current	25,506	24,765
Other current liabilities	15,780	430
Total current liabilities	135,921	131,403
Long-term debt, net of current maturities	1,155,049	1,160,127
Deferred rent, net of current portion		10,083
Lease liabilities, net of current portion	127,646
Deferred revenue, net of current portion	31,532	26,374
Deferred tax liabilities	2,067	2,303
Payable pursuant to tax benefit arrangements, net of current portion	407,884	404,468
Other liabilities	2,250	1,447
Total noncurrent liabilities	1,726,428	1,604,802
Commitments and contingencies (Note 12)
Stockholders’ equity (deficit):
Accumulated other comprehensive income	189	94
Additional paid in capital	27,240	19,732
Accumulated deficit	(466,032)	(394,410)
Total stockholders’ deficit attributable to Planet Fitness Inc.	(438,594)	(374,574)
Non-controlling interests	(3,523)	(8,215)
Total stockholders’ deficit	(442,117)	(382,789)
Total liabilities and stockholders’ deficit	1,420,232	1,353,416
Class A Common Stock
Stockholders’ equity (deficit):
Common stock, value	8	9
Class B Common Stock
Stockholders’ equity (deficit):
Common stock, value	$ 1	$ 1

Condensed consolidated balanc_2

Condensed consolidated balance sheets (Unaudited) (Parenthetical) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Accounts receivable, allowance for bad debts	$ 37	$ 84
Accumulated depreciation	$ 70,083	$ 53,086
Class A Common Stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	300,000,000	300,000,000
Common stock, shares issued	81,773,000	83,584,000
Common stock, shares outstanding	81,773,000	83,584,000
Class B Common Stock
Common stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	8,562,000	9,448,000
Common stock, shares outstanding	8,562,000	9,448,000

Condensed consolidated statemen

Condensed consolidated statements of operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenue:
Revenue	$ 166,815	$ 136,656	$ 497,292	$ 398,538
Operating costs and expenses:
Cost of revenue	46,194	36,871	135,071	100,114
Store operations	22,295	18,751	63,363	55,154
Selling, general and administrative	20,928	17,233	57,944	52,066
National advertising fund expense	12,652	11,377	36,986	32,997
Depreciation and amortization	11,832	8,863	32,316	25,947
Other (gain) loss	(147)	(12)	99	958
Total operating costs and expenses	113,754	93,083	325,779	267,236
Income from operations	53,061	43,573	171,513	131,302
Other expense, net:
Interest income	1,808	2,025	5,585	2,480
Interest expense	(14,807)	(17,909)	(44,192)	(35,725)
Other expense	(61)	(27)	(4,824)	(338)
Total other expense, net	(13,060)	(15,911)	(43,431)	(33,583)
Income before income taxes	40,001	27,662	128,082	97,719
Provision for income taxes	10,309	7,190	26,924	23,335
Net income	29,692	20,472	101,158	74,384
Less net income attributable to non-controlling interests	3,915	3,001	13,128	11,158
Net income attributable to Planet Fitness, Inc.	$ 25,777	$ 17,471	$ 88,030	$ 63,226
Class A Common Stock
Net income per share of Class A common stock:
Basic (in dollars per share)	$ 0.31	$ 0.20	$ 1.05	$ 0.72
Diluted (in dollars per share)	$ 0.31	$ 0.20	$ 1.04	$ 0.72
Weighted-average shares of Class A common stock outstanding:
Basic (in shares)	83,157,430	88,047,401	83,699,609	87,727,300
Diluted (in shares)	83,806,906	88,457,804	84,354,172	88,064,051
Franchise
Revenue:
Revenue	$ 53,443	$ 41,997	$ 164,624	$ 129,575
Commission income
Revenue:
Revenue	614	1,448	2,673	5,012
National advertising fund
Revenue:
Revenue	12,652	11,377	36,986	32,997
Corporate-owned stores
Revenue:
Revenue	40,742	35,406	118,481	102,365
Equipment
Revenue:
Revenue	$ 59,364	$ 46,428	$ 174,528	$ 128,589

Condensed consolidated statem_2

Condensed consolidated statements of comprehensive income (loss) (Unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income including non-controlling interests	$ 29,692	$ 20,472	$ 101,158	$ 74,384
Other comprehensive income (loss), net:
Unrealized gain on interest rate caps, net of tax	0	606	0	989
Foreign currency translation adjustments	(62)	40	95	(23)
Total other comprehensive income, net	(62)	646	95	966
Total comprehensive income including non-controlling interests	29,630	21,118	101,253	75,350
Less: total comprehensive income attributable to non-controlling interests	3,915	3,007	13,128	11,221
Total comprehensive income attributable to Planet Fitness, Inc.	$ 25,715	$ 18,111	$ 88,125	$ 64,129

Condensed consolidated statem_3

Condensed consolidated statements of cash flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash flows from operating activities:
Net income	$ 101,158	$ 74,384
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	32,316	25,947
Amortization of deferred financing costs	4,014	2,041
Amortization of favorable leases	0	280
Amortization of asset retirement obligations	178	0
Amortization of interest rate caps	0	1,170
Deferred tax expense	15,666	19,654
Loss on extinguishment of debt	0	4,570
Loss (gain) on re-measurement of tax benefit arrangement	4,638	(354)
Provision for bad debts	13	8
Loss on reacquired franchise rights	0	360
(Gain) loss on disposal of property and equipment	(84)	542
Equity-based compensation	3,565	4,137
Changes in operating assets and liabilities, excluding effects of acquisitions:
Accounts receivable	12,779	10,922
Due to and due from related parties	(344)	3,174
Inventory	2,509	(3,450)
Other assets and other current assets	(4,628)	4,972
Accounts payable and accrued expenses	(12,939)	2,426
Other liabilities and other current liabilities	1,510	(2,869)
Income taxes	3,047	1,028
Payable pursuant to tax benefit arrangements	(17,476)	(21,706)
Equipment deposits	658	4,950
Deferred revenue	6,103	7,544
Leases and deferred rent	54	4,156
Net cash provided by operating activities	152,737	143,886
Cash flows from investing activities:
Additions to property and equipment	(37,138)	(18,601)
Acquisition of franchises	(14,801)	(45,752)
Proceeds from sale of property and equipment	84	196
Purchase of intellectual property	(300)	0
Net cash used in investing activities	(52,155)	(64,157)
Cash flows from financing activities:
Principal payments on capital lease obligations	(59)	(35)
Proceeds from issuance of long-term debt	0	1,200,000
Repayment of long-term debt	(9,000)	(709,469)
Payment of deferred financing and other debt-related costs	0	(27,191)
Exercise of stock options and ESPP proceeds	1,892	1,106
Repurchase and retirement of Class A common stock	(157,945)	(42,090)
Dividend equivalent payments	(229)	(881)
Distributions to Continuing LLC Members	(5,499)	(5,369)
Net cash (used in) provided by financing activities	(170,840)	416,071
Effects of exchange rate changes on cash and cash equivalents	370	(234)
Net (decrease) increase in cash, cash equivalents and restricted cash	(69,888)	495,566
Cash, cash equivalents and restricted cash, beginning of period	320,139	113,080
Cash, cash equivalents and restricted cash, end of period	250,251	608,646
Supplemental cash flow information:
Net cash paid for income taxes	9,061	3,777
Cash paid for interest	40,335	20,015
Non-cash investing activities:
Non-cash additions to property and equipment	$ 4,837	$ 2,217

Condensed consolidated statem_4

Condensed consolidated statement of changes in equity (deficit) (Unaudited) - USD ($) shares in Thousands, $ in Thousands	Total	Accumulated other comprehensive (loss) income	Additional paid- in capital	Accumulated deficit	Non-controlling interests	Class A Common Stock	Class A Common StockCommon stock	Class B Common Stock	Class B Common StockCommon stock
Beginning balance (in shares) at Dec. 31, 2017							87,188		11,193
Beginning balance at Dec. 31, 2017	$ (136,937)	$ (648)	$ 12,118	$ (130,966)	$ (17,451)		$ 9		$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	74,384			63,226	11,158
Equity-based compensation expense	4,137		4,140	(3)
Exchanges of Class B common stock, shares issued							1,640		(1,640)
Exchanges of Class B common stock		1	(2,913)		2,912
Exercise of stock options, vesting of restricted share units and ESPP share purchase (in shares)							81
Exercise of stock options, vesting of restricted share units and ESPP share purchase	1,106		1,106
Repurchase/Retirement of common stock (in shares)							(824)		(9)
Repurchase/Retirement of common stock	(42,090)			(42,090)
Tax benefit arrangement liability and deferred taxes arising from exchanges of Class B common stock	2,786		2,786
Distributions paid to members of Pla-Fit Holdings	(5,369)				(5,369)
Cumulative effect adjustment	(9,192)			(9,192)
Forfeiture of dividend equivalents	61			61
Other comprehensive income	966	903			63
Ending balance (in shares) at Sep. 30, 2018							88,085		9,544
Ending balance at Sep. 30, 2018	(110,148)	256	17,237	(118,964)	(8,687)		$ 9		$ 1
Beginning balance (in shares) at Jun. 30, 2018							87,932		10,471
Beginning balance at Jun. 30, 2018	(91,248)	(385)	14,744	(94,348)	(11,269)		$ 9		$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	20,472			17,471	3,001
Equity-based compensation expense	1,450		1,450
Exchanges of Class B common stock, shares issued							927		(927)
Exchanges of Class B common stock		1	(1,442)		1,441
Exercise of stock options, vesting of restricted share units and ESPP share purchase (in shares)							50
Exercise of stock options, vesting of restricted share units and ESPP share purchase	706		706
Repurchase/Retirement of common stock (in shares)							(824)
Repurchase/Retirement of common stock	(42,090)			(42,090)
Tax benefit arrangement liability and deferred taxes arising from exchanges of Class B common stock	1,779		1,779
Distributions paid to members of Pla-Fit Holdings	(1,866)				(1,866)
Forfeiture of dividend equivalents	3			3
Other comprehensive income	646	640			6
Ending balance (in shares) at Sep. 30, 2018							88,085		9,544
Ending balance at Sep. 30, 2018	(110,148)	256	17,237	(118,964)	(8,687)		$ 9		$ 1
Beginning balance (in shares) at Dec. 31, 2018						83,584	83,584	9,448	9,448
Beginning balance at Dec. 31, 2018	(382,789)	94	19,732	(394,410)	(8,215)		$ 9		$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	101,158			88,030	13,128
Equity-based compensation expense	3,565		3,565
Exchanges of Class B common stock, shares issued							886		(886)
Exchanges of Class B common stock			(1,172)		1,172
Exercise of stock options, vesting of restricted share units and ESPP share purchase (in shares)							99
Exercise of stock options, vesting of restricted share units and ESPP share purchase	2,035		2,035
Repurchase/Retirement of common stock (in shares)							(2,796)
Repurchase/Retirement of common stock	(157,946)		273	(157,945)	(273)		$ (1)
Tax benefit arrangement liability and deferred taxes arising from exchanges of Class B common stock	2,807		2,807
Non-cash adjustments to VIEs	(3,836)				(3,836)
Distributions paid to members of Pla-Fit Holdings	(5,499)				(5,499)
Cumulative effect adjustment	(1,713)			(1,713)
Forfeiture of dividend equivalents	6			6
Other comprehensive income	95	95
Ending balance (in shares) at Sep. 30, 2019						81,773	81,773	8,562	8,562
Ending balance at Sep. 30, 2019	(442,117)	189	27,240	(466,032)	(3,523)		$ 8		$ 1
Beginning balance (in shares) at Jun. 30, 2019							83,995		8,582
Beginning balance at Jun. 30, 2019	(314,372)	251	24,495	(333,870)	(5,257)		$ 8		$ 1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	29,692			25,777	3,915
Equity-based compensation expense	1,286		1,286
Exchanges of Class B common stock, shares issued							20		(20)
Exercise of stock options, vesting of restricted share units and ESPP share purchase (in shares)							30
Exercise of stock options, vesting of restricted share units and ESPP share purchase	826		826
Repurchase/Retirement of common stock (in shares)							(2,272)
Repurchase/Retirement of common stock	(157,945)		209	(157,945)	(209)
Tax benefit arrangement liability and deferred taxes arising from exchanges of Class B common stock	424		424
Non-cash adjustments to VIEs	(215)				(215)
Distributions paid to members of Pla-Fit Holdings	(1,757)				(1,757)
Forfeiture of dividend equivalents	6			6
Other comprehensive income	(62)	(62)
Ending balance (in shares) at Sep. 30, 2019						81,773	81,773	8,562	8,562
Ending balance at Sep. 30, 2019	$ (442,117)	$ 189	$ 27,240	$ (466,032)	$ (3,523)		$ 8		$ 1

Business Organization

Business Organization	9 Months Ended
	Sep. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Business Organization	Business Organization Planet Fitness, Inc. (the “Company”), through its subsidiaries, is a franchisor and operator of fitness centers, with more than 14.1 million members and 1,899 owned and franchised locations (referred to as stores) in 50 states, the District of Columbia, Puerto Rico, Canada, the Dominican Republic, Panama and Mexico as of September 30, 2019 . 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. • Selling fitness-related equipment to franchisee-owned stores. The Company was formed as a Delaware corporation on March 16, 2015 for the purpose of facilitating an initial public offering (the “IPO”), which was completed on August 11, 2015 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 that occurred prior to the IPO, 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 through its subsidiaries. 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. 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 limited liability company units of Pla-Fit Holdings (“Holdings Units”) not owned by the Company. Unless otherwise specified, “the Company” refers to both Planet Fitness, Inc. and Pla-Fit Holdings throughout the remainder of these notes. As of September 30, 2019 , Planet Fitness, Inc. held 100.0% of the voting interest and 90.5% of the economic interest of Pla-Fit Holdings and the holders of Holdings Units of Pla-Fit Holdings (the “Continuing LLC Owners”) held the remaining 9.5%

Summary of Significant Accounti

Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies (a) Basis of presentation and consolidation The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). Accordingly, these interim financial statements do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the results of operations, financial position and cash flows for the periods presented have been reflected. All significant intercompany balances and transactions have been eliminated in consolidation. The condensed consolidated financial statements as of and for the three and nine months ended September 30, 2019 and 2018 are unaudited. The condensed consolidated balance sheet as of December 31, 2018 has been derived from the audited financial statements at that date but does not include all of the disclosures required by U.S. GAAP. These interim condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 (the “Annual Report”) filed with the SEC on March 1, 2019 . Operating results for the interim periods are not necessarily indicative of the results that may be expected for the full year. As discussed in Note 1, Planet Fitness, Inc. consolidates Pla-Fit Holdings. 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”), PF Melville LLC (“PF Melville”), and Planet Fitness NAF, LLC (the “NAF”) based on the determination that the Company is the primary beneficiary with respect to these VIEs. MMR and PF Melville 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. The NAF is an advertising fund on behalf of which the Company collects 2% of gross monthly membership dues from franchisees, in accordance with the provisions of the franchise agreements, and uses the amounts received to support our national marketing campaigns, our social media platforms and the development of local advertising materials. (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, the liability for the Company’s tax benefit arrangements, and the value of the lease liability and related right-of-use asset recorded in accordance with ASC 842 (see Note 2(d) and 16). (c) Fair Value ASC 820, Fair Value Measurements and Disclosures , establishes a three-level valuation hierarchy for disclosure of fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. Categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels are defined as follows: 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 carrying value and estimated fair value of long-term debt as of September 30, 2019 and December 31, 2018 were as follows: September 30, 2019 December 31, 2018 Carrying value Estimated fair value (1) Carrying value Estimated fair value (1) Long-term debt $ 1,188,000 $ 1,230,305 $ 1,197,000 $ 1,188,985 (1) The estimated fair value of our long-term debt is estimated primarily based on current bid prices for our long-term debt. Judgment is required to develop these estimates. As such, the fair value of our long-term debt is classified within Level 2, as defined under U.S. GAAP. (d) Recent accounting pronouncements In February 2016, the FASB established Topic 842, Leases , by issuing ASU No. 2016-02, Leases , in February 2016. Topic 842 was subsequently amended by ASU No. 2018-01, Land Easement Practical Expedient for Transition to Topic 842; ASU No. 2018-10, Codification Improvements to Topic 842, Leases; and ASU No. 2018-11, Targeted Improvements . This guidance is intended to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The new guidance requires lessees to recognize the assets and liabilities on the balance sheet for the rights and obligations created by leases with lease terms of more than 12 months, amends various other aspects of accounting for leases by lessees and lessors, and requires enhanced disclosures. Leases will be classified as finance or operating, with the classification affecting the pattern and classification of expense recognition within the income statement. The Company adopted the new standard on January 1, 2019 and used the effective date as our date of initial application. Consequently, financial information has not been updated and the disclosures required under the new standard are not provided for dates and periods before January 1, 2019. The new guidance also provides several practical expedients and policies that companies may elect upon transition. The Company has elected the package of practical expedients under which it did not reassess the classification of its existing leases, reevaluate whether any expired or existing contracts are or contain leases or reassess initial direct costs under the new guidance. The Company did not elect the practical expedient pertaining to land easements, as it is not applicable to its leases. Additionally, the Company elected to use the practical expedient that permits a reassessment of lease terms for existing leases using hindsight. The new standard also provides practical expedients for an entity’s ongoing accounting. The Company elected the short-term lease recognition exemption. This means, for those leases that qualify, the Company will not recognize right-of-use (“ROU”) assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases of those assets in transition. The Company also elected the practical expedient to not separate lease and non-lease components. Upon transition to the new guidance on January 1, 2019, the Company recognized approximately $130,000 of operating lease liabilities. Additionally, the Company recorded ROU assets in a corresponding amount, net of amounts reclassified from other assets and liabilities, including deferred rent, tenant improvement allowances, and favorable lease assets, as specified by the new lease guidance. In connection with the election of the hindsight practical expedient related to reassessing lease terms for existing leases as of January 1, 2019, the Company recorded a cumulative transition adjustment of $1,713 through retained earnings, net of tax. The FASB issued ASU No. 2017-4, Intangibles–Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment, in January 2017. This guidance eliminates the requirement to calculate the implied fair value, essentially eliminating step two from the goodwill impairment test. The new standard requires goodwill impairment to be based upon the results of step one of the impairment test, which is defined as the excess of the carrying value of a reporting unit over its fair value. The impairment charge will be limited to the amount of goodwill allocated to that reporting unit. This guidance will be effective for fiscal years beginning after December 15, 2019, including interim periods within that year. This new guidance is not expected to have a material impact on the Company’s consolidated financial statements. The FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract , in August 2018. The guidance helps align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). This guidance will be effective for fiscal years beginning after December 15, 2019, including interim periods within that year, but allows for early adoption. The Company is currently evaluating the impact of this guidance on its consolidated financial statements.

Variable Interest Entities

Variable Interest Entities	9 Months Ended
	Sep. 30, 2019
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]
Variable Interest Entities	Variable Interest Entities The carrying values of VIEs included in the consolidated financial statements as of September 30, 2019 and December 31, 2018 are as follows: September 30, 2019 December 31, 2018 Assets Liabilities Assets Liabilities PF Melville $ 2,722 $ — $ 4,787 $ — MMR 2,233 — 3,563 — Total $ 4,955 $ — $ 8,350 $ — The Company also has variable interests in certain franchisees mainly through the guarantee of lease agreements. The Company’s maximum obligation, as a result of its guarantees of leases, is approximately $10,376 and $732 as of September 30, 2019 and December 31, 2018 , respectively. In 2019, in connection with a real estate partnership, the Company began guaranteeing certain leases of its franchisees up to a maximum period of ten years with earlier expiration dates possible if certain conditions are met. 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 estimated to be incurred from the Company’s involvement with these entities, which is not material.

Acquisitions

Acquisitions	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Acquisitions	Acquisitions Maine Acquisition On May 30, 2019, the Company purchased from one of its franchisees certain assets associated with four franchisee-owned stores in Maine for a cash payment of $14,801 . The Company financed the purchase through cash on hand. The acquired stores are included in the Corporate-owned stores segment. The purchase consideration was allocated as follows: Amount Fixed assets $ 999 Reacquired franchise rights 6,740 Customer relationships 30 Unfavorable leases, net (140 ) Other assets 78 Goodwill 7,239 Liabilities assumed, including deferred revenues (145 ) $ 14,801 The goodwill created through the purchase is attributable to the assumed future value of the cash flows from the stores acquired. The goodwill is amortizable and deductible for tax purposes over 15 years. The acquisition was not material to the results of operations of the Company. Colorado Acquisition On August 10, 2018, the Company purchased from one of its franchisees certain assets associated with four franchisee-owned stores in Colorado for a cash payment of $17,249 . As a result of the transaction, the Company incurred a loss on unfavorable reacquired franchise rights of $10 , which has been reflected in other operating costs in the statement of operations. The loss incurred reduced the net purchase price to $17,239 . The Company financed the purchase through cash on hand. The acquired stores are included in the Corporate-owned stores segment. The purchase consideration was allocated as follows: Amount Fixed assets $ 3,873 Reacquired franchise rights 4,610 Customer relationships 140 Favorable leases, net 80 Other assets 143 Goodwill 8,476 Liabilities assumed, including deferred revenues (83 ) $ 17,239 The goodwill created through the purchase is attributable to the assumed future value of the cash flows from the stores acquired. The goodwill is amortizable and deductible for tax purposes over 15 years. The acquisition was not material to the results of operations of the Company. Long Island Acquisition On January 1, 2018, the Company purchased from one of its franchisees certain assets associated with six franchisee-owned stores in New York for a cash payment of $28,503 . As a result of the transaction, the Company incurred a loss on unfavorable reacquired franchise rights of $350 , which has been reflected in other operating costs in the statement of operations. The loss incurred reduced the net purchase price to $28,153 . The Company financed the purchase through cash on hand. The acquired stores are included in the Corporate-owned stores segment. The purchase consideration was allocated as follows: Amount Fixed assets $ 4,672 Reacquired franchise rights 7,640 Customer relationships 1,150 Favorable leases, net 520 Reacquired area development rights 150 Other assets 275 Goodwill 14,056 Liabilities assumed, including deferred revenues (310 ) $ 28,153 The goodwill created through the purchase is attributable to the assumed future value of the cash flows from the stores acquired. The goodwill is amortizable and deductible for tax purposes over 15 years. The acquisition was not material to the results of operations of the Company.

Goodwill and Intangible Assets

Goodwill and Intangible Assets	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Intangible assets	Goodwill and Intangible Assets A summary of goodwill and intangible assets at September 30, 2019 and December 31, 2018 is as follows: September 30, 2019 Weighted average amortization period (years) Gross carrying amount Accumulated amortization Net carrying Amount Customer relationships 11.0 $ 173,093 (108,948 ) $ 64,145 Noncompete agreements 5.0 14,500 (14,500 ) — Order backlog 0.4 3,400 (3,400 ) — Reacquired franchise rights 7.7 28,089 (11,259 ) 16,830 219,082 (138,107 ) 80,975 Indefinite-lived intangible: Trade and brand names N/A 146,600 — 146,600 Total intangible assets $ 365,682 $ (138,107 ) $ 227,575 Goodwill $ 206,752 $ — $ 206,752 December 31, 2018 Weighted Gross Accumulated Net carrying Customer relationships 11.0 $ 173,063 $ (99,439 ) $ 73,624 Noncompete agreements 5.0 14,500 (14,500 ) — Favorable leases 8.0 4,017 (2,345 ) 1,672 Order backlog 0.4 3,400 (3,400 ) — Reacquired franchise rights 7.0 21,349 (8,615 ) 12,734 216,329 (128,299 ) 88,030 Indefinite-lived intangible: Trade and brand names N/A 146,300 — 146,300 Total intangible assets $ 362,629 $ (128,299 ) $ 234,330 Goodwill $ 199,513 $ — $ 199,513 In connection with the adoption of ASC 842, as of January 1, 2019, the Company has derecognized the favorable leases intangible asset, and the favorable leases balance is now included in the ROU asset, net balance (Note 16). The Company determined that no impairment charges were required during any periods presented and the increase to goodwill was due to the acquisition of four franchisee-owned stores on May 30, 2019 (Note 4). Amortization expense related to the intangible assets totaled $4,160 and $4,027 for the three months ended September 30, 2019 and 2018 , respectively and $ 12,186 and $ 12,052 for the nine months ended September 30, 2019 and 2018 , respectively. The anticipated annual amortization expense related to intangible assets to be recognized in future years as of September 30, 2019 is as follows: Amount Remainder of 2019 $ 4,146 2020 14,968 2021 15,053 2022 15,280 2023 15,185 Thereafter 16,343 Total $ 80,975

Long-Term Debt

Long-Term Debt	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Long-Term Debt	Long-Term Debt Long-term debt as of September 30, 2019 and December 31, 2018 consists of the following: September 30, 2019 December 31, 2018 Class A-2-I notes $ 569,250 $ 573,563 Class A-2-II notes 618,750 623,437 Total debt, excluding deferred financing costs 1,188,000 1,197,000 Deferred financing costs, net of accumulated amortization (20,951 ) (24,873 ) Total debt 1,167,049 1,172,127 Current portion of long-term debt and line of credit 12,000 12,000 Long-term debt, net of current portion $ 1,155,049 $ 1,160,127 Future annual principal payments of long-term debt as of September 30, 2019 are as follows: Amount Remainder of 2019 $ 3,000 2020 12,000 2021 12,000 2022 562,563 2023 6,250 Thereafter 592,187 Total $ 1,188,000 On August 1, 2018, Planet Fitness Master Issuer LLC (the “Master Issuer”), a limited-purpose, bankruptcy remote, wholly-owned indirect subsidiary of Pla-Fit Holdings, LLC, entered into a base indenture and a related supplemental indenture (collectively, the “Indenture”) under which the Master Issuer may issue multiple series of notes. On the same date, the Master Issuer issued Series 2018-1 4.262% Fixed Rate Senior Secured Notes, Class A-2-I (the “Class A-2-I Notes”) with an initial principal amount of $575,000 and Series 2018-1 4.666% Fixed Rate Senior Secured Notes, Class A-2-II (the “Class A-2-II Notes” and, together with the Class A-2-I Notes, the “Class A-2 Notes”) with an initial principal amount of $625,000 . In connection with the issuance of the Class A-2 Notes, the Master Issuer also entered into a revolving financing facility that allows for the issuance of up to $75,000 in Series 2018-1 Variable Funding Senior Notes, Class A-1 (the “Variable Funding Notes” and together with the Class A-2 Notes, the “Series 2018-1 Senior Notes”), and certain letters of credit, all of which was undrawn as of both September 30, 2019 and December 31, 2018 . The Series 2018-1 Senior Notes were issued in a securitization transaction pursuant to which most of the Company’s domestic revenue-generating assets, consisting principally of franchise-related agreements, certain corporate-owned store assets, equipment supply agreements and intellectual property and license agreements for the use of intellectual property, were assigned to the Master Issuer and certain other limited-purpose, bankruptcy remote, wholly-owned indirect subsidiaries of the Company that act as guarantors of the Series 2018-1 Senior Notes and that have pledged substantially all of their assets to secure the Series 2018-1 Senior Notes. Interest and principal payments on the Class A-2 Notes are payable on a quarterly basis. The requirement to make such quarterly principal payments on the Class A-2 Notes is subject to certain financial conditions set forth in the Indenture. The legal final maturity date of the Class A-2 Notes is in September 2048, but it is anticipated that, unless earlier prepaid to the extent permitted under the Indenture, the Class A-2-I Notes will be repaid in September 2022 and the Class A-2-II Notes will be repaid in September 2025 (together, the “Anticipated Repayment Dates”). If the Master Issuer has not repaid or refinanced the Class A-2 Notes prior to the respective Anticipated Repayment Dates, additional interest will accrue pursuant to the Indenture. The Variable Funding Notes will accrue interest at a variable interest rate based on (i) the prime rate, (ii) overnight federal funds rates, (iii) the London interbank offered rate for U.S. Dollars, or (iv) with respect to advances made by conduit investors, the weighted average cost of, or related to, the issuance of commercial paper allocated to fund or maintain such advances, in each case plus any applicable margin and as specified in the Variable Funding Note agreement. There is a commitment fee on the unused portion of the Variable Funding Notes of 0.5% based on utilization. It is anticipated that the principal and interest on the Variable Funding Notes will be repaid in full on or prior to September 2023, subject to two additional one -year extensions. Following the anticipated repayment date (and any extensions thereof) additional interest will accrue on the Variable Funding Notes equal to 5.0% per year. In connection with the issuance of the Series 2018-1 Senior Notes, the Company incurred debt issuance costs of $ 27,133 . The debt issuance costs are being amortized to “Interest expense” through the Anticipated Repayment Dates of the Class A-2 Notes utilizing the effective interest rate method. The Series 2018-1 Senior Notes are subject to covenants and restrictions customary for transactions of this type, including (i) that the Master Issuer maintains specified reserve accounts to be used to make required payments in respect of the Series 2018-1 Senior Notes, (ii) provisions relating to optional and mandatory prepayments and the related payment of specified amounts, including specified make-whole payments in the case of the Class A-2 Notes under certain circumstances, (iii) certain indemnification payments in the event, among other things, the assets pledged as collateral for the Series 2018-1 Senior Notes are in stated ways defective or ineffective, and (iv) covenants relating to recordkeeping, access to information and similar matters. The Series 2018-1 Senior Notes are also subject to customary rapid amortization events provided for in the Indenture, including events tied to failure to maintain stated debt service coverage ratios, certain manager termination events, an event of default, and the failure to repay or refinance the Class A-2 Notes on the applicable scheduled Anticipated Repayment Dates. The Series 2018-1 Senior Notes are also subject to certain customary events of default, including events relating to non-payment of required interest, principal, or other amounts due on or with respect to the Series 2018-1 Senior Notes, failure to comply with covenants within certain time frames, certain bankruptcy events, breaches of specified representations and warranties, failure of security interests to be effective, and certain judgments. In accordance with the Indenture, certain cash accounts have been established with the Indenture trustee (the “Trustee”) for the benefit of the trustee and the noteholders, and are restricted in their use. The Company holds restricted cash which primarily represents cash collections held by the Trustee, interest, principal, and commitment fee reserves held by the Trustee related to the Company’s Series 2018-1 Senior Notes. As of September 30, 2019 , the Company had restricted cash held by the Trustee of $ 30,499 . Restricted cash has been combined with cash and cash equivalents when reconciling the beginning and end of period balances in the consolidated statements of cash flows. The proceeds from the issuance of the Class A-2 Notes were used to repay all amounts outstanding on the Term Loan B under the Company’s prior credit facility. As a result, the Company recorded a loss on early extinguishment of debt of $ 4,570 in August 2018, primarily consisting of the write-off of deferred costs related to the prior credit facility. In connection with the repayment of the Term Loan B, the Company terminated the related interest rate caps with notional amounts totaling $219,837

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	9 Months Ended
	Sep. 30, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Activities	Derivative Instruments and Hedging Activities Prior to the refinancing transactions described in Note 6, the Company used 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. In order to manage the market risk arising from the previously outstanding term loans, the Company entered into a series of interest rate caps. As of September 30, 2019 and December 31, 2018 , the Company had no interest rate cap agreements outstanding. In connection with the issuance of the Class A-2 Notes, the Company terminated the interest rate caps it had entered into in order to hedge interest expense on its previously outstanding term loans.

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2019
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions Amounts due from related parties of $412 as of September 30, 2019 recorded within other receivables on the condensed consolidated balance sheet relate to a potential indemnification reimbursement for an outstanding legal matter, see Note 12. Activity with entities considered to be related parties is summarized below: For the three months ended For the nine months ended 2019 2018 2019 2018 Franchise revenue $ 505 $ 897 $ 1,735 $ 2,453 Equipment revenue 883 1,472 2,325 1,782 Total revenue from related parties $ 1,388 $ 2,369 4,060 $ 4,235 Additionally, the Company had deferred area development agreement revenue from related parties of $260 and $779 as of September 30, 2019 and December 31, 2018 , respectively. The Company had payables to related parties pursuant to tax benefit arrangements of $55,478 and $ 59,458 , as of September 30, 2019 and December 31, 2018 , respectively (see Note 11). The Company provides administrative services to the NAF and charges NAF a fee for providing these services. The services provided include accounting services, information technology, data processing, product development, legal and administrative support, and other operating expenses, which amounted to $402 and $676 for the three months ended September 30, 2019 and 2018 , respectively, and $1,771 and $1,872 for the nine months ended September 30, 2019 and 2018 , respectively.

Stockholder's Equity

Stockholder's Equity	9 Months Ended
	Sep. 30, 2019
Equity [Abstract]
Stockholder's Equity	Stockholder’s Equity Pursuant to the exchange agreement between the Company and the Continuing LLC Owners, 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. In connection with any exchange of Holdings Units for shares of Class A common stock by a Continuing LLC Owner, the number of Holdings Units held by the Company is correspondingly increased as it acquires the exchanged Holdings Units, and a corresponding number of shares of Class B common stock are canceled. During the nine months ended September 30, 2019 , certain existing holders of Holdings Units exercised their exchange rights and exchanged 885,810 Holdings Units for 885,810 newly-issued shares of Class A common stock. Simultaneously, and in connection with these exchanges, 885,810 shares of Class B common stock were surrendered by the holders of Holdings Units that exercised their exchange rights and canceled. Additionally, in connection with these exchanges, Planet Fitness, Inc. received 885,810 Holdings Units, increasing its total ownership interest in Pla-Fit Holdings. As a result of the above transactions, as of September 30, 2019 : • Holders of our Class A common stock owned 81,773,267 shares of our Class A common stock, representing 90.5% of the voting power in the Company and, through the Company, 81,773,267 Holdings Units representing 90.5% of the economic interest in Pla-Fit Holdings; and • the Continuing LLC Owners collectively owned 8,561,920 Holdings Units, representing 9.5% of the economic interest in Pla-Fit Holdings, and 8,561,920 shares of our Class B common stock, representing 9.5% of the voting power in the Company. Share repurchase program On August 3, 2018, our board of directors approved an increase to the total amount of the previously approved share repurchase program to $ 500,000 . On November 13, 2018, the Company entered into a $ 300,000 accelerated share repurchase agreement (the “ASR Agreement”) with Citibank, N.A. (“the Bank”). Pursuant to the terms of the ASR Agreement, on November 14, 2018, the Company paid the Bank $ 300,000 upfront in cash and received 4,607,410 shares of the Company’s Class A common stock, which were retired, and the Company elected to record as a reduction to retained earnings of $ 240,000 . Final settlement of the ASR Agreement occurred on April 30, 2019. At final settlement, the Bank delivered 524,124 additional shares of the Company’s Class A common stock, based on a weighted average cost per share of $58.46 over the term of the ASR agreement, which were retired. This had been evaluated as an unsettled forward contract indexed to our own stock, with $ 60,000 classified as a reduction to retained earnings at the original date of payment. During the three months ended September 30, 2019, the Company purchased 2,272,001 shares of its Class A common stock for an average purchase price of $69.51 per share, completing its previously approved $500,000 share repurchase program.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Earnings Per Share	Earnings Per Share Basic 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 during the same period. 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. 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 used to compute basic and diluted earnings per share of Class A common stock: Three months ended Nine months ended 2019 2018 2019 2018 Numerator Net income $ 29,692 $ 20,472 $ 101,158 $ 74,384 Less: net income attributable to non-controlling interests 3,915 3,001 13,128 11,158 Net income attributable to Planet Fitness, Inc. $ 25,777 $ 17,471 $ 88,030 $ 63,226 Denominator Weighted-average shares of Class A common stock outstanding - basic 83,157,430 88,047,401 83,699,609 87,727,300 Effect of dilutive securities: Stock options 606,888 382,499 609,788 319,610 Restricted stock units 42,588 27,904 44,775 17,141 Weighted-average shares of Class A common stock outstanding - diluted 83,806,906 88,457,804 84,354,172 88,064,051 Earnings per share of Class A common stock - basic $ 0.31 $ 0.20 $ 1.05 $ 0.72 Earnings per share of Class A common stock - diluted $ 0.31 $ 0.20 $ 1.04 $ 0.72 Weighted average shares of Class B common stock of 8,579,094 and 10,004,682 for the three months ended September 30, 2019 and 2018 , respectively, and 8,798,695 and 10,550,857 for the nine months ended September 30, 2019 and 2018 , 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 76,455 and 36,342 for the three months ended September 30, 2019 and 2018 , respectively, and 50,063 and 114,628 for the nine months ended September 30, 2019 and 2018 , 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 713 and 0 for the three months ended September 30, 2019 and 2018 , respectively, and 1,688 and 11,245 for the nine months ended September 30, 2019 and 2018 , respectively, were evaluated under the treasury stock method for potential dilutive effects and were determined to be anti-dilutive.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes The Company is the sole managing member of Pla-Fit Holdings, which is treated as a partnership for U.S. federal and certain state and local income taxes. 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, 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. The Company’s effective tax rate was 25.8% and 26.0% for the three months ended September 30, 2019 and 2018 , respectively and 21.0% and 23.9% for the nine months ended September 30, 2019 and 2018 , respectively. The effective tax rate for the three months ended September 30, 2019 differed from the U.S. federal statutory rate of 21% primarily due to state and local taxes, partially offset by income attributable to non-controlling interest. The effective tax rate for the nine months ended September 30, 2019 of 21% included the impact of state and local taxes, offset by income attributable to non-controlling interest. The Company was also subject to taxes in foreign jurisdictions. Undistributed earnings of foreign operations were not material for the three and nine months ended September 30, 2019 and 2018 . Net deferred tax assets of $ 416,678 and $ 412,538 as of September 30, 2019 and December 31, 2018 , respectively, relate primarily to the tax effects of temporary differences in the book basis as compared to the tax basis of our investment in Pla-Fit Holdings as a result of the secondary offerings, other exchanges, recapitalization transactions and the IPO. As of September 30, 2019 , the Company does not have any net operating loss carryforwards. As of September 30, 2019 and December 31, 2018 , the total liability related to uncertain tax positions was $ 260 and $ 300 , respectively. The Company recognizes interest accrued and penalties, if applicable, related to unrecognized tax benefits in income tax expense. Interest and penalties for the three and nine months ended September 30, 2019 and 2018 were not material. 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 (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 exchanges 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 TSG AIV II-A L.P and TSG PF Co-Investors A L.P. (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. During the nine months ended September 30, 2019 , 885,810 Holdings Units were exchanged by the TRA Holders 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, we recorded a decrease to our net deferred tax assets of $517 during the nine months ended September 30, 2019 . As a result of these exchanges, during the nine months ended September 30, 2019 , we also recognized deferred tax assets in the amount of $20,340 , and corresponding tax benefit arrangement liabilities of $17,016 , representing approximately 85% of the tax benefits due to the TRA Holders. The offset to the entries recorded in connection with exchanges was to equity. As of September 30, 2019 and December 31, 2018 , the Company had a liability of $ 433,390 and $ 429,233 , respectively, related to its projected obligations under the tax benefit arrangements. Projected future payments under the tax benefit arrangements are as follows: Amount Remainder of 2019 $ 7,307 2020 25,965 2021 26,584 2022 27,141 2023 27,679 Thereafter 318,714 Total $ 433,390

Commitments and contingencies

Commitments and contingencies	9 Months Ended
	Sep. 30, 2019
Commitments and Contingencies Disclosure [Abstract]
Commitments and contingencies	Commitments and contingencies 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. On May 3, 2019, the Company and other defendants received a joint and several judgment against them in the amount of $6,185 , inclusive of accrued interest, in a civil action brought by a former employee. As of September 30, 2019 , the Company has estimated its obligation related to this matter to be approximately $1,237 , which is included in other current liabilities on the condensed consolidated balance sheet. In connection with 2012 acquisition of Pla-Fit Holdings on November 8, 2012, the sellers are obligated to indemnify the Company related to this specific matter. The Company has therefore recorded an offsetting indemnification receivable of $1,237 in other receivables on the Company’s condensed consolidated balance sheet, of which $412 is due from a related party. As of September 30, there is an additional $4,272 of potential incremental interest being sought by the plaintiff; however, the Company does not currently believe that payment of the incremental interest is probable and therefore has not recorded such amount as of September 30, 2019 . The Company is not currently aware of any other 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.

Segments

Segments	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Segments	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, Canada, the Dominican Republic, Panama and Mexico, including revenues and expenses from the NAF beginning on January 1, 2018 (see Note 15). 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 our United States 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 three and nine months ended September 30, 2019 and 2018 . The “Corporate and other” category, 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. Three months ended Nine months ended 2019 2018 2019 2018 Revenue Franchise segment revenue - U.S. $ 65,494 $ 53,528 $ 200,111 $ 164,225 Franchise segment revenue - International 1,215 1,294 4,172 3,359 Franchise segment total 66,709 54,822 204,283 167,584 Corporate-owned stores - U.S. 39,637 34,323 115,178 99,020 Corporate-owned stores - International 1,105 1,083 3,303 3,345 Corporate-owned stores total 40,742 35,406 118,481 102,365 Equipment segment - U.S. 59,364 46,428 174,528 128,589 Equipment segment total 59,364 46,428 174,528 128,589 Total revenue $ 166,815 $ 136,656 $ 497,292 $ 398,538 Franchise segment revenue includes franchise revenue, NAF revenue, and commission income. Franchise revenue includes revenue generated from placement services of $4,277 and $2,518 for the three months ended September 30, 2019 and 2018 , respectively, and $12,112 and $7,694 for the nine months September 30, 2019 and 2018 , respectively. Three months ended Nine months ended 2019 2018 2019 2018 Segment EBITDA Franchise $ 44,328 $ 37,075 $ 141,548 $ 113,793 Corporate-owned stores 16,799 15,279 50,505 42,115 Equipment 13,741 9,654 40,920 28,579 Corporate and other (10,036 ) (9,599 ) (33,968 ) (27,576 ) Total Segment EBITDA $ 64,832 $ 52,409 $ 199,005 $ 156,911 The following table reconciles total Segment EBITDA to income before taxes: Three months ended Nine months ended 2019 2018 2019 2018 Total Segment EBITDA $ 64,832 $ 52,409 $ 199,005 $ 156,911 Less: Depreciation and amortization 11,832 8,863 32,316 25,947 Other expense (61 ) (27 ) (4,824 ) (338 ) Income from operations 53,061 43,573 171,513 131,302 Interest income 1,808 2,025 5,585 2,480 Interest expense (14,807 ) (17,909 ) (44,192 ) (35,725 ) Other expense (61 ) (27 ) (4,824 ) (338 ) Income before income taxes $ 40,001 $ 27,662 $ 128,082 $ 97,719 The following table summarizes the Company’s assets by reportable segment: September 30, 2019 December 31, 2018 Franchise $ 189,192 $ 185,899 Corporate-owned stores 390,101 243,221 Equipment 195,022 210,462 Unallocated 645,917 713,834 Total consolidated assets $ 1,420,232 $ 1,353,416 The table above includes $1,204 and $1,892 of long-lived assets located in the Company’s corporate-owned stores in Canada as of September 30, 2019 and December 31, 2018 , respectively. All other assets are located in the U.S. For the segment footnote disclosure as of December 31, 2018, an immaterial error of $133,523 has been corrected to appropriately classify assets from the franchise segment to the unallocated segment at December 31, 2018. This correction does not impact the Company’s previously reported consolidated balance sheets, consolidated statements of cash flow or statements of operations. The following table summarizes the Company’s goodwill by reportable segment: September 30, 2019 December 31, 2018 Franchise $ 16,938 $ 16,938 Corporate-owned stores 97,148 89,909 Equipment 92,666 92,666 Consolidated goodwill $ 206,752 $ 199,513

Corporate-Owned and Franchisee-

Corporate-Owned and Franchisee-Owned Stores	9 Months Ended
	Sep. 30, 2019
Franchisors [Abstract]
Corporate-Owned and Franchisee-Owned Stores	Corporate-Owned and Franchisee-Owned Stores The following table shows changes in our corporate-owned and franchisee-owned stores for the three and nine months ended September 30, 2019 and 2018 : For the three months ended For the nine months ended 2019 2018 2019 2018 Franchisee-owned stores: Stores operated at beginning of period 1,779 1,540 1,666 1,456 New stores opened 39 40 157 131 Stores debranded, sold or consolidated(1) (1 ) (7 ) (6 ) (14 ) Stores operated at end of period 1,817 1,573 1,817 1,573 Corporate-owned stores: Stores operated at beginning of period 80 68 76 62 New stores opened 2 1 2 1 Stores acquired from franchisees — 4 4 10 Stores operated at end of period 82 73 82 73 Total stores: Stores operated at beginning of period 1,859 1,608 1,742 1,518 New stores opened 41 41 159 132 Stores acquired, debranded, sold or consolidated (1) (1 ) (3 ) (2 ) (4 ) Stores operated at end of period 1,899 1,646 1,899 1,646 (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.

Revenue recognition

Revenue recognition	9 Months Ended
	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Revenue recognition	Revenue recognition Contract Liabilities Contract liabilities consist of deferred revenue resulting from initial and renewal franchise fees and area development agreement (“ADA”) fees paid by franchisees, as well as transfer fees, which are generally recognized on a straight-line basis over the term of the underlying franchise agreement. Also included are corporate-owned store enrollment fees, annual fees and monthly fees as well as deferred equipment rebates relating to our equipment business. We classify these contract liabilities as deferred revenue in our condensed consolidated balance sheets. The following table reflects the change in contract liabilities between December 31, 2018 and September 30, 2019 . Contract liabilities Balance at December 31, 2018 $ 49,862 Revenue recognized that was included in the contract liability at the beginning of the year (23,082 ) Increase, excluding amounts recognized as revenue during the period 29,390 Balance at September 30, 2019 $ 56,170 The following table illustrates estimated revenues expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) as of September 30, 2019 . The Company has elected to exclude short term contracts, sales and usage based royalties and any other variable consideration recognized on an “as invoiced” basis. Contract liabilities to be recognized in: Amount Remainder of 2019 $ 12,422 2020 13,129 2021 3,279 2022 3,061 2023 2,818 Thereafter 21,461 Total $ 56,170

Leases

Leases	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Leases	Leases The Company leases space to operate corporate-owned stores, equipment, office, and warehouse space. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term. For leases beginning in 2019 and later, we account for fixed lease and non-lease components together as a single, combined lease component. Variable lease costs, which may include common area maintenance, insurance, and taxes are not included in the lease liability and are expensed in the period incurred. Our corporate-owned store leases generally have remaining terms of one to ten years , and typically include one or more renewal options, with renewal terms that can generally extend the lease term from three to ten years or more. The exercise of lease renewal options is at our sole discretion. The Company includes options to renew in the expected term when they are reasonably certain to be exercised. The depreciable life of assets and leasehold improvements are limited by the expected lease term. Operating lease assets and liabilities are recognized at the lease commencement date. Operating lease liabilities represent the present value of lease payments not yet paid. Operating lease ROU assets represent our right to use an underlying asset and are based upon the operating lease liabilities adjusted for prepayments or accrued lease payments, initial direct costs and lease incentives. To determine the present value of lease payments not yet paid, we estimate incremental secured borrowing rates corresponding to the maturities of the leases based upon interpolated rates using our Class A-2 Notes. The Company has certain non-real estate leases that are accounted for as finance leases under ASC 842, which is similar to the accounting for capital leases under the previous standard. These leases are immaterial, and therefore the Company has not included them in them in the tables below, except for their location on the consolidated balance sheet. Our leases typically contain rent escalations over the lease term. We recognize expense for these leases on a straight-line basis over the lease term. Additionally, tenant incentives used to fund leasehold improvements are recognized when earned and reduce our ROU asset related to the lease. These tenant incentives are amortized as reduction of rent expense over the lease term. Our lease agreements do not contain any material residual value guarantees or material restrictive covenants. For periods prior to January 1, 2019, the Company recognized rent expense related to leases 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, was recorded as deferred rent in the Company’s consolidated balance sheets. Leases Classification September 30, 2019 Assets Operating lease assets Right of use asset, net $ 127,746 Finance lease assets Property and equipment, net of accumulated depreciation 252 Total lease assets $ 127,998 Liabilities Current: Operating Other current liabilities $ 14,543 Noncurrent: Operating Lease liabilities, net of current portion 127,646 Financing Other liabilities 284 Total lease liabilities $ 142,473 Weighted-average remaining lease term (years) - operating leases 8.9 Weighted-average discount rate - operating leases 5.1 % During the three and nine months ended September 30, 2019 , the components of lease cost were as follows: Three months ended September 30, 2019 Nine months ended September 30, 2019 Operating lease cost $ 5,317 $ 15,117 Variable lease cost 2,118 6,091 Total lease cost $ 7,435 $ 21,208 The Company’s costs related to short-term leases, those with a duration between one and twelve months, were immaterial. Supplemental disclosures of cash flow information related to leases were as follows: Three months ended September 30, 2019 Nine months ended September 30, 2019 Cash paid for lease liabilities $ 4,958 $ 14,323 Operating assets obtained in exchange for operating lease liabilities $ 16,173 $ 19,154 As of September 30, 2019 , maturities of lease liabilities were as follows: Amount Remainder of 2019 $ 5,019 2020 21,491 2021 22,055 2022 21,751 2023 20,594 Thereafter 89,594 Total lease payments $ 180,504 Less: imputed interest 38,031 Present value of lease liabilities $ 142,473 As of September 30, 2019 , operating lease payments exclude approximately $34,456 of legally binding minimum lease payments for leases signed but not yet commenced. As of December 31, 2018, under the previous accounting guidance for leases, approximate annual future commitments under noncancelable operating leases were as follows: Amount 2019 15,911 2020 15,219 2021 13,454 2022 12,561 2023 11,133 Thereafter 45,324 Total 113,602
Leases	Leases The Company leases space to operate corporate-owned stores, equipment, office, and warehouse space. Leases with an initial term of 12 months or less are not recorded on the balance sheet; we recognize lease expense for these leases on a straight-line basis over the lease term. For leases beginning in 2019 and later, we account for fixed lease and non-lease components together as a single, combined lease component. Variable lease costs, which may include common area maintenance, insurance, and taxes are not included in the lease liability and are expensed in the period incurred. Our corporate-owned store leases generally have remaining terms of one to ten years , and typically include one or more renewal options, with renewal terms that can generally extend the lease term from three to ten years or more. The exercise of lease renewal options is at our sole discretion. The Company includes options to renew in the expected term when they are reasonably certain to be exercised. The depreciable life of assets and leasehold improvements are limited by the expected lease term. Operating lease assets and liabilities are recognized at the lease commencement date. Operating lease liabilities represent the present value of lease payments not yet paid. Operating lease ROU assets represent our right to use an underlying asset and are based upon the operating lease liabilities adjusted for prepayments or accrued lease payments, initial direct costs and lease incentives. To determine the present value of lease payments not yet paid, we estimate incremental secured borrowing rates corresponding to the maturities of the leases based upon interpolated rates using our Class A-2 Notes. The Company has certain non-real estate leases that are accounted for as finance leases under ASC 842, which is similar to the accounting for capital leases under the previous standard. These leases are immaterial, and therefore the Company has not included them in them in the tables below, except for their location on the consolidated balance sheet. Our leases typically contain rent escalations over the lease term. We recognize expense for these leases on a straight-line basis over the lease term. Additionally, tenant incentives used to fund leasehold improvements are recognized when earned and reduce our ROU asset related to the lease. These tenant incentives are amortized as reduction of rent expense over the lease term. Our lease agreements do not contain any material residual value guarantees or material restrictive covenants. For periods prior to January 1, 2019, the Company recognized rent expense related to leases 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, was recorded as deferred rent in the Company’s consolidated balance sheets. Leases Classification September 30, 2019 Assets Operating lease assets Right of use asset, net $ 127,746 Finance lease assets Property and equipment, net of accumulated depreciation 252 Total lease assets $ 127,998 Liabilities Current: Operating Other current liabilities $ 14,543 Noncurrent: Operating Lease liabilities, net of current portion 127,646 Financing Other liabilities 284 Total lease liabilities $ 142,473 Weighted-average remaining lease term (years) - operating leases 8.9 Weighted-average discount rate - operating leases 5.1 % During the three and nine months ended September 30, 2019 , the components of lease cost were as follows: Three months ended September 30, 2019 Nine months ended September 30, 2019 Operating lease cost $ 5,317 $ 15,117 Variable lease cost 2,118 6,091 Total lease cost $ 7,435 $ 21,208 The Company’s costs related to short-term leases, those with a duration between one and twelve months, were immaterial. Supplemental disclosures of cash flow information related to leases were as follows: Three months ended September 30, 2019 Nine months ended September 30, 2019 Cash paid for lease liabilities $ 4,958 $ 14,323 Operating assets obtained in exchange for operating lease liabilities $ 16,173 $ 19,154 As of September 30, 2019 , maturities of lease liabilities were as follows: Amount Remainder of 2019 $ 5,019 2020 21,491 2021 22,055 2022 21,751 2023 20,594 Thereafter 89,594 Total lease payments $ 180,504 Less: imputed interest 38,031 Present value of lease liabilities $ 142,473 As of September 30, 2019 , operating lease payments exclude approximately $34,456 of legally binding minimum lease payments for leases signed but not yet commenced. As of December 31, 2018, under the previous accounting guidance for leases, approximate annual future commitments under noncancelable operating leases were as follows: Amount 2019 15,911 2020 15,219 2021 13,454 2022 12,561 2023 11,133 Thereafter 45,324 Total 113,602

Summary of significant accoun_2

Summary of significant accounting policies (Policies)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Basis of presentation and consolidation	Basis of presentation and consolidation The accompanying unaudited interim condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. GAAP”) for interim financial information and pursuant to the rules and regulations of the Securities and Exchange Commission (the “SEC”). Accordingly, these interim financial statements do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring adjustments) necessary for a fair presentation of the results of operations, financial position and cash flows for the periods presented have been reflected. All significant intercompany balances and transactions have been eliminated in consolidation. The condensed consolidated financial statements as of and for the three and nine months ended September 30, 2019 and 2018 are unaudited. The condensed consolidated balance sheet as of December 31, 2018 has been derived from the audited financial statements at that date but does not include all of the disclosures required by U.S. GAAP. These interim condensed consolidated financial statements should be read in conjunction with the Company’s Annual Report on Form 10-K for the year ended December 31, 2018 (the “Annual Report”) filed with the SEC on March 1, 2019 . Operating results for the interim periods are not necessarily indicative of the results that may be expected for the full year. As discussed in Note 1, Planet Fitness, Inc. consolidates Pla-Fit Holdings. 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”), PF Melville LLC (“PF Melville”), and Planet Fitness NAF, LLC (the “NAF”) based on the determination that the Company is the primary beneficiary with respect to these VIEs. MMR and PF Melville 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. The NAF is an advertising fund on behalf of which the Company collects 2%
Use of estimates	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, the liability for the Company’s tax benefit arrangements, and the value of the lease liability and related right-of-use asset recorded in accordance with ASC 842 (see Note 2(d) and 16).
Fair Value	Fair Value ASC 820, Fair Value Measurements and Disclosures , establishes a three-level valuation hierarchy for disclosure of fair value measurements. The valuation hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. Categorization within the valuation hierarchy is based upon the lowest level of input that is significant to the fair value measurement. The three levels are defined as follows: 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.
Recent accounting pronouncements	Recent accounting pronouncements In February 2016, the FASB established Topic 842, Leases , by issuing ASU No. 2016-02, Leases , in February 2016. Topic 842 was subsequently amended by ASU No. 2018-01, Land Easement Practical Expedient for Transition to Topic 842; ASU No. 2018-10, Codification Improvements to Topic 842, Leases; and ASU No. 2018-11, Targeted Improvements . This guidance is intended to increase transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and disclosing key information about leasing arrangements. The new guidance requires lessees to recognize the assets and liabilities on the balance sheet for the rights and obligations created by leases with lease terms of more than 12 months, amends various other aspects of accounting for leases by lessees and lessors, and requires enhanced disclosures. Leases will be classified as finance or operating, with the classification affecting the pattern and classification of expense recognition within the income statement. The Company adopted the new standard on January 1, 2019 and used the effective date as our date of initial application. Consequently, financial information has not been updated and the disclosures required under the new standard are not provided for dates and periods before January 1, 2019. The new guidance also provides several practical expedients and policies that companies may elect upon transition. The Company has elected the package of practical expedients under which it did not reassess the classification of its existing leases, reevaluate whether any expired or existing contracts are or contain leases or reassess initial direct costs under the new guidance. The Company did not elect the practical expedient pertaining to land easements, as it is not applicable to its leases. Additionally, the Company elected to use the practical expedient that permits a reassessment of lease terms for existing leases using hindsight. The new standard also provides practical expedients for an entity’s ongoing accounting. The Company elected the short-term lease recognition exemption. This means, for those leases that qualify, the Company will not recognize right-of-use (“ROU”) assets or lease liabilities, and this includes not recognizing ROU assets or lease liabilities for existing short-term leases of those assets in transition. The Company also elected the practical expedient to not separate lease and non-lease components. Upon transition to the new guidance on January 1, 2019, the Company recognized approximately $130,000 of operating lease liabilities. Additionally, the Company recorded ROU assets in a corresponding amount, net of amounts reclassified from other assets and liabilities, including deferred rent, tenant improvement allowances, and favorable lease assets, as specified by the new lease guidance. In connection with the election of the hindsight practical expedient related to reassessing lease terms for existing leases as of January 1, 2019, the Company recorded a cumulative transition adjustment of $1,713 through retained earnings, net of tax. The FASB issued ASU No. 2017-4, Intangibles–Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment, in January 2017. This guidance eliminates the requirement to calculate the implied fair value, essentially eliminating step two from the goodwill impairment test. The new standard requires goodwill impairment to be based upon the results of step one of the impairment test, which is defined as the excess of the carrying value of a reporting unit over its fair value. The impairment charge will be limited to the amount of goodwill allocated to that reporting unit. This guidance will be effective for fiscal years beginning after December 15, 2019, including interim periods within that year. This new guidance is not expected to have a material impact on the Company’s consolidated financial statements. The FASB issued ASU No. 2018-15, Intangibles - Goodwill and Other - Internal-Use Software (Subtopic 350-40): Customer’s Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement That Is a Service Contract , in August 2018. The guidance helps align the requirements for capitalizing implementation costs incurred in a hosting arrangement that is a service contract with the requirements for capitalizing implementation costs incurred to develop or obtain internal-use software (and hosting arrangements that include an internal-use software license). This guidance will be effective for fiscal years beginning after December 15, 2019, including interim periods within that year, but allows for early adoption. The Company is currently evaluating the impact of this guidance on its consolidated financial statements.

Summary of Significant Accoun_3

Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2019
Accounting Policies [Abstract]
Summary of Company's Liabilities Measured at Fair Value	The carrying value and estimated fair value of long-term debt as of September 30, 2019 and December 31, 2018 were as follows: September 30, 2019 December 31, 2018 Carrying value Estimated fair value (1) Carrying value Estimated fair value (1) Long-term debt $ 1,188,000 $ 1,230,305 $ 1,197,000 $ 1,188,985 (1) The estimated fair value of our long-term debt is estimated primarily based on current bid prices for our long-term debt. Judgment is required to develop these estimates. As such, the fair value of our long-term debt is classified within Level 2, as defined under U.S. GAAP.

Variable Interest Entities (Tab

Variable Interest Entities (Tables)	9 Months Ended
	Sep. 30, 2019
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]
Carrying Value of Variable Interest Entities of Consolidated Financial Statements	The carrying values of VIEs included in the consolidated financial statements as of September 30, 2019 and December 31, 2018 are as follows: September 30, 2019 December 31, 2018 Assets Liabilities Assets Liabilities PF Melville $ 2,722 $ — $ 4,787 $ — MMR 2,233 — 3,563 — Total $ 4,955 $ — $ 8,350 $ —

Acquisitions (Tables)

Acquisitions (Tables)	9 Months Ended
	Sep. 30, 2019
Business Combinations [Abstract]
Purchase Consideration Allocation	The purchase consideration was allocated as follows: Amount Fixed assets $ 999 Reacquired franchise rights 6,740 Customer relationships 30 Unfavorable leases, net (140 ) Other assets 78 Goodwill 7,239 Liabilities assumed, including deferred revenues (145 ) $ 14,801 The purchase consideration was allocated as follows: Amount Fixed assets $ 4,672 Reacquired franchise rights 7,640 Customer relationships 1,150 Favorable leases, net 520 Reacquired area development rights 150 Other assets 275 Goodwill 14,056 Liabilities assumed, including deferred revenues (310 ) $ 28,153 The purchase consideration was allocated as follows: Amount Fixed assets $ 3,873 Reacquired franchise rights 4,610 Customer relationships 140 Favorable leases, net 80 Other assets 143 Goodwill 8,476 Liabilities assumed, including deferred revenues (83 ) $ 17,239

Goodwill and Intangible Assets

Goodwill and Intangible Assets (Tables)	9 Months Ended
	Sep. 30, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Summary of Goodwill and Intangible Assets	A summary of goodwill and intangible assets at September 30, 2019 and December 31, 2018 is as follows: September 30, 2019 Weighted average amortization period (years) Gross carrying amount Accumulated amortization Net carrying Amount Customer relationships 11.0 $ 173,093 (108,948 ) $ 64,145 Noncompete agreements 5.0 14,500 (14,500 ) — Order backlog 0.4 3,400 (3,400 ) — Reacquired franchise rights 7.7 28,089 (11,259 ) 16,830 219,082 (138,107 ) 80,975 Indefinite-lived intangible: Trade and brand names N/A 146,600 — 146,600 Total intangible assets $ 365,682 $ (138,107 ) $ 227,575 Goodwill $ 206,752 $ — $ 206,752 December 31, 2018 Weighted Gross Accumulated Net carrying Customer relationships 11.0 $ 173,063 $ (99,439 ) $ 73,624 Noncompete agreements 5.0 14,500 (14,500 ) — Favorable leases 8.0 4,017 (2,345 ) 1,672 Order backlog 0.4 3,400 (3,400 ) — Reacquired franchise rights 7.0 21,349 (8,615 ) 12,734 216,329 (128,299 ) 88,030 Indefinite-lived intangible: Trade and brand names N/A 146,300 — 146,300 Total intangible assets $ 362,629 $ (128,299 ) $ 234,330 Goodwill $ 199,513 $ — $ 199,513
Summary of Amortization expenses	The anticipated annual amortization expense related to intangible assets to be recognized in future years as of September 30, 2019 is as follows: Amount Remainder of 2019 $ 4,146 2020 14,968 2021 15,053 2022 15,280 2023 15,185 Thereafter 16,343 Total $ 80,975

Long-Term Debt (Tables)

Long-Term Debt (Tables)	9 Months Ended
	Sep. 30, 2019
Debt Disclosure [Abstract]
Schedule of Long-Term Debt	Long-term debt as of September 30, 2019 and December 31, 2018 consists of the following: September 30, 2019 December 31, 2018 Class A-2-I notes $ 569,250 $ 573,563 Class A-2-II notes 618,750 623,437 Total debt, excluding deferred financing costs 1,188,000 1,197,000 Deferred financing costs, net of accumulated amortization (20,951 ) (24,873 ) Total debt 1,167,049 1,172,127 Current portion of long-term debt and line of credit 12,000 12,000 Long-term debt, net of current portion $ 1,155,049 $ 1,160,127
Schedule of Future Annual Payments of Long-term Debt	Future annual principal payments of long-term debt as of September 30, 2019 are as follows: Amount Remainder of 2019 $ 3,000 2020 12,000 2021 12,000 2022 562,563 2023 6,250 Thereafter 592,187 Total $ 1,188,000

Related party transactions (Tab

Related party transactions (Tables)	9 Months Ended
	Sep. 30, 2019
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	Activity with entities considered to be related parties is summarized below: For the three months ended For the nine months ended 2019 2018 2019 2018 Franchise revenue $ 505 $ 897 $ 1,735 $ 2,453 Equipment revenue 883 1,472 2,325 1,782 Total revenue from related parties $ 1,388 $ 2,369 4,060 $ 4,235

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Earnings Per Share [Abstract]
Reconciliation of Numerators and Denominators Used to Compute Basic and Diluted Earnings per Share	The following table sets forth reconciliations used to compute basic and diluted earnings per share of Class A common stock: Three months ended Nine months ended 2019 2018 2019 2018 Numerator Net income $ 29,692 $ 20,472 $ 101,158 $ 74,384 Less: net income attributable to non-controlling interests 3,915 3,001 13,128 11,158 Net income attributable to Planet Fitness, Inc. $ 25,777 $ 17,471 $ 88,030 $ 63,226 Denominator Weighted-average shares of Class A common stock outstanding - basic 83,157,430 88,047,401 83,699,609 87,727,300 Effect of dilutive securities: Stock options 606,888 382,499 609,788 319,610 Restricted stock units 42,588 27,904 44,775 17,141 Weighted-average shares of Class A common stock outstanding - diluted 83,806,906 88,457,804 84,354,172 88,064,051 Earnings per share of Class A common stock - basic $ 0.31 $ 0.20 $ 1.05 $ 0.72 Earnings per share of Class A common stock - diluted $ 0.31 $ 0.20 $ 1.04 $ 0.72

Income Taxes (Tables)

Income Taxes (Tables)	9 Months Ended
	Sep. 30, 2019
Income Tax Disclosure [Abstract]
Schedule of Future Payments Under Tax Benefit Arrangements	Projected future payments under the tax benefit arrangements are as follows: Amount Remainder of 2019 $ 7,307 2020 25,965 2021 26,584 2022 27,141 2023 27,679 Thereafter 318,714 Total $ 433,390

Segments (Tables)

Segments (Tables)	9 Months Ended
	Sep. 30, 2019
Segment Reporting [Abstract]
Summary of Financial Information for the Company's Reportable Segments	Three months ended Nine months ended 2019 2018 2019 2018 Segment EBITDA Franchise $ 44,328 $ 37,075 $ 141,548 $ 113,793 Corporate-owned stores 16,799 15,279 50,505 42,115 Equipment 13,741 9,654 40,920 28,579 Corporate and other (10,036 ) (9,599 ) (33,968 ) (27,576 ) Total Segment EBITDA $ 64,832 $ 52,409 $ 199,005 $ 156,911 The tables below summarize the financial information for the Company’s reportable segments for the three and nine months ended September 30, 2019 and 2018 . The “Corporate and other” category, 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. Three months ended Nine months ended 2019 2018 2019 2018 Revenue Franchise segment revenue - U.S. $ 65,494 $ 53,528 $ 200,111 $ 164,225 Franchise segment revenue - International 1,215 1,294 4,172 3,359 Franchise segment total 66,709 54,822 204,283 167,584 Corporate-owned stores - U.S. 39,637 34,323 115,178 99,020 Corporate-owned stores - International 1,105 1,083 3,303 3,345 Corporate-owned stores total 40,742 35,406 118,481 102,365 Equipment segment - U.S. 59,364 46,428 174,528 128,589 Equipment segment total 59,364 46,428 174,528 128,589 Total revenue $ 166,815 $ 136,656 $ 497,292 $ 398,538
Reconciliation of Total Segment EBITDA to Income Before Taxes	The following table reconciles total Segment EBITDA to income before taxes: Three months ended Nine months ended 2019 2018 2019 2018 Total Segment EBITDA $ 64,832 $ 52,409 $ 199,005 $ 156,911 Less: Depreciation and amortization 11,832 8,863 32,316 25,947 Other expense (61 ) (27 ) (4,824 ) (338 ) Income from operations 53,061 43,573 171,513 131,302 Interest income 1,808 2,025 5,585 2,480 Interest expense (14,807 ) (17,909 ) (44,192 ) (35,725 ) Other expense (61 ) (27 ) (4,824 ) (338 ) Income before income taxes $ 40,001 $ 27,662 $ 128,082 $ 97,719
Summary of Company's Assets by Reportable Segment	The following table summarizes the Company’s assets by reportable segment: September 30, 2019 December 31, 2018 Franchise $ 189,192 $ 185,899 Corporate-owned stores 390,101 243,221 Equipment 195,022 210,462 Unallocated 645,917 713,834 Total consolidated assets $ 1,420,232 $ 1,353,416
Summary of Company's Goodwill by Reportable Segment	The following table summarizes the Company’s goodwill by reportable segment: September 30, 2019 December 31, 2018 Franchise $ 16,938 $ 16,938 Corporate-owned stores 97,148 89,909 Equipment 92,666 92,666 Consolidated goodwill $ 206,752 $ 199,513

Corporate-Owned and Franchise_2

Corporate-Owned and Franchisee-Owned Stores (Tables)	9 Months Ended
	Sep. 30, 2019
Franchisors [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 three and nine months ended September 30, 2019 and 2018 : For the three months ended For the nine months ended 2019 2018 2019 2018 Franchisee-owned stores: Stores operated at beginning of period 1,779 1,540 1,666 1,456 New stores opened 39 40 157 131 Stores debranded, sold or consolidated(1) (1 ) (7 ) (6 ) (14 ) Stores operated at end of period 1,817 1,573 1,817 1,573 Corporate-owned stores: Stores operated at beginning of period 80 68 76 62 New stores opened 2 1 2 1 Stores acquired from franchisees — 4 4 10 Stores operated at end of period 82 73 82 73 Total stores: Stores operated at beginning of period 1,859 1,608 1,742 1,518 New stores opened 41 41 159 132 Stores acquired, debranded, sold or consolidated (1) (1 ) (3 ) (2 ) (4 ) Stores operated at end of period 1,899 1,646 1,899 1,646 (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.

Revenue recognition (Tables)

Revenue recognition (Tables)	9 Months Ended
	Sep. 30, 2019
Revenue from Contract with Customer [Abstract]
Schedule of Contract Liabilities	The following table reflects the change in contract liabilities between December 31, 2018 and September 30, 2019 . Contract liabilities Balance at December 31, 2018 $ 49,862 Revenue recognized that was included in the contract liability at the beginning of the year (23,082 ) Increase, excluding amounts recognized as revenue during the period 29,390 Balance at September 30, 2019 $ 56,170
Remaining Performance Obligation	The following table illustrates estimated revenues expected to be recognized in the future related to performance obligations that are unsatisfied (or partially unsatisfied) as of September 30, 2019 . The Company has elected to exclude short term contracts, sales and usage based royalties and any other variable consideration recognized on an “as invoiced” basis. Contract liabilities to be recognized in: Amount Remainder of 2019 $ 12,422 2020 13,129 2021 3,279 2022 3,061 2023 2,818 Thereafter 21,461 Total $ 56,170

Leases (Tables)

Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Leases [Abstract]
Balance Sheet Classification of Lease Assets and Liabilities	Leases Classification September 30, 2019 Assets Operating lease assets Right of use asset, net $ 127,746 Finance lease assets Property and equipment, net of accumulated depreciation 252 Total lease assets $ 127,998 Liabilities Current: Operating Other current liabilities $ 14,543 Noncurrent: Operating Lease liabilities, net of current portion 127,646 Financing Other liabilities 284 Total lease liabilities $ 142,473 Weighted-average remaining lease term (years) - operating leases 8.9 Weighted-average discount rate - operating leases 5.1 %
Components of Lease Cost	During the three and nine months ended September 30, 2019 , the components of lease cost were as follows: Three months ended September 30, 2019 Nine months ended September 30, 2019 Operating lease cost $ 5,317 $ 15,117 Variable lease cost 2,118 6,091 Total lease cost $ 7,435 $ 21,208 Supplemental disclosures of cash flow information related to leases were as follows: Three months ended September 30, 2019 Nine months ended September 30, 2019 Cash paid for lease liabilities $ 4,958 $ 14,323 Operating assets obtained in exchange for operating lease liabilities $ 16,173 $ 19,154
Schedule of Supplemental Disclosures of Cash Flow Information Related to Leases	During the three and nine months ended September 30, 2019 , the components of lease cost were as follows: Three months ended September 30, 2019 Nine months ended September 30, 2019 Operating lease cost $ 5,317 $ 15,117 Variable lease cost 2,118 6,091 Total lease cost $ 7,435 $ 21,208 Supplemental disclosures of cash flow information related to leases were as follows: Three months ended September 30, 2019 Nine months ended September 30, 2019 Cash paid for lease liabilities $ 4,958 $ 14,323 Operating assets obtained in exchange for operating lease liabilities $ 16,173 $ 19,154
Maturities of Operating Lease Liabilities	As of September 30, 2019 , maturities of lease liabilities were as follows: Amount Remainder of 2019 $ 5,019 2020 21,491 2021 22,055 2022 21,751 2023 20,594 Thereafter 89,594 Total lease payments $ 180,504 Less: imputed interest 38,031 Present value of lease liabilities $ 142,473
Previous Accounting Guidance For Future Commitments Under Noncancelable Operating Leases	As of December 31, 2018, under the previous accounting guidance for leases, approximate annual future commitments under noncancelable operating leases were as follows: Amount 2019 15,911 2020 15,219 2021 13,454 2022 12,561 2023 11,133 Thereafter 45,324 Total 113,602

Business Organization - Additio

Business Organization - Additional Information (Detail) member in Millions	9 Months Ended
	Sep. 30, 2019memberstorestatesegment	Jun. 30, 2019store	Dec. 31, 2018store	Sep. 30, 2018store	Jun. 30, 2018store	Dec. 31, 2017store	Aug. 05, 2015
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of owned and franchised locations | store	1,899	1,859	1,742	1,646	1,608	1,518
Number of states in which entity operates | state	50
Number of reportable segments | segment	3
Pla-Fit Holdings, LLC
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of ownership	100.00%						100.00%
Percentage of economic interest	90.50%
Pla-Fit Holdings, LLC | Holdings Units
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of economic interest	9.50%
Planet Intermediate, LLC | Pla-Fit Holdings, LLC
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of ownership							100.00%
Planet Fitness Holdings, LLC | Planet Intermediate, LLC
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Percentage of ownership							100.00%
Minimum
Organization Consolidation And Presentation Of Financial Statements Disclosure [Line Items]
Number of members (more than) | member	14.1

Summary of Significant Accoun_4

Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Sep. 30, 2019	Sep. 30, 2018
Significant Accounting Policies [Line Items]
Present value of lease liabilities		$ 142,473
Cumulative transition adjustment		$ (1,713)	$ (9,192)
Planet Fitness NAF, LLC
Significant Accounting Policies [Line Items]
Percentage of franchise membership billing revenue		2.00%
ASU 2016-02
Significant Accounting Policies [Line Items]
Present value of lease liabilities	$ 130,000
Cumulative transition adjustment	$ 1,713

Summary of Significant Accoun_5

Summary of Significant Accounting Policies - Summary of Company's Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Carrying value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 1,188,000	$ 1,197,000
Estimated fair value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 1,230,305	$ 1,188,985

Variable Interest Entities - Ca

Variable Interest Entities - Carrying Value of Variable Interest Entities of Consolidated Financial Statements (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Variable Interest Entity [Line Items]
Assets	$ 4,955	$ 8,350
Liabilities	0	0
PF Melville
Variable Interest Entity [Line Items]
Assets	2,722	4,787
Liabilities	0	0
MMR
Variable Interest Entity [Line Items]
Assets	2,233	3,563
Liabilities	$ 0	$ 0

Variable Interest Entities - Ad

Variable Interest Entities - Additional Information (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Variable Interest Entity, Consolidated, Carrying Amount, Assets and Liabilities, Net [Abstract]
Maximum obligation of guarantees of leases and debt	$ 10,376	$ 732
Franchisee lease term, maximum	10 years

Acquisitions - Narrative (Detai

Acquisitions - Narrative (Details) $ in Thousands	May 30, 2019USD ($)store	Aug. 10, 2018USD ($)store	Jan. 01, 2018USD ($)store	Sep. 30, 2019store	Jun. 30, 2019store	Dec. 31, 2018store	Sep. 30, 2018store	Jun. 30, 2018store	Dec. 31, 2017store
Business Acquisition [Line Items]
Number of owned and franchised locations | store				1,899	1,859	1,742	1,646	1,608	1,518
Maine Acquisition
Business Acquisition [Line Items]
Number of owned and franchised locations | store	4
Acquisition, gross cash payments	$ 14,801
Colorado Acquisition
Business Acquisition [Line Items]
Number of owned and franchised locations | store		4
Acquisition, gross cash payments		$ 17,249
Loss on reacquired franchise rights		10
Consideration transferred		$ 17,239
Long Island Acquisition
Business Acquisition [Line Items]
Number of owned and franchised locations | store			6
Acquisition, gross cash payments			$ 28,503
Loss on reacquired franchise rights			350
Consideration transferred			$ 28,153

Acquisitions - Purchase Conside

Acquisitions - Purchase Consideration Allocation (Details) - USD ($) $ in Thousands	Sep. 30, 2019	May 30, 2019	Dec. 31, 2018	Aug. 10, 2018	Jan. 01, 2018
Business Acquisition [Line Items]
Goodwill	$ 206,752		$ 199,513
Maine Acquisition
Business Acquisition [Line Items]
Fixed assets		$ 999
Unfavorable leases, net		(140)
Other assets		78
Goodwill		7,239
Liabilities assumed, including deferred revenues		(145)
Net assets acquired		14,801
Colorado Acquisition
Business Acquisition [Line Items]
Fixed assets				$ 3,873
Other assets				143
Goodwill				8,476
Liabilities assumed, including deferred revenues				(83)
Net assets acquired				17,239
Long Island Acquisition
Business Acquisition [Line Items]
Fixed assets					$ 4,672
Other assets					275
Goodwill					14,056
Liabilities assumed, including deferred revenues					(310)
Net assets acquired					28,153
Reacquired franchise rights | Maine Acquisition
Business Acquisition [Line Items]
Intangible assets		6,740
Reacquired franchise rights | Colorado Acquisition
Business Acquisition [Line Items]
Intangible assets				4,610
Reacquired franchise rights | Long Island Acquisition
Business Acquisition [Line Items]
Intangible assets					7,640
Customer relationships | Maine Acquisition
Business Acquisition [Line Items]
Intangible assets		$ 30
Customer relationships | Colorado Acquisition
Business Acquisition [Line Items]
Intangible assets				140
Customer relationships | Long Island Acquisition
Business Acquisition [Line Items]
Intangible assets					1,150
Favorable leases, net | Colorado Acquisition
Business Acquisition [Line Items]
Intangible assets				$ 80
Favorable leases, net | Long Island Acquisition
Business Acquisition [Line Items]
Intangible assets					520
Reacquired area development rights | Long Island Acquisition
Business Acquisition [Line Items]
Intangible assets					$ 150

Goodwill and Intangible Asset_2

Goodwill and Intangible Assets - Summary of Goodwill and Intangible Assets (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Goodwill And Intangible Assets [Line Items]
Gross carrying amount	$ 219,082	$ 216,329
Accumulated amortization	(138,107)	(128,299)
Net carrying Amount	80,975	88,030
Total intangible assets, Gross carrying amount	365,682	362,629
Total intangible assets, Net carrying Amount	227,575	234,330
Goodwill, gross carrying amount	206,752	199,513
Goodwill, Accumulated amortization	0	0
Goodwill, net carrying amount	206,752	199,513
Trade and brand names
Goodwill And Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 146,600	$ 146,300
Customer relationships
Goodwill And Intangible Assets [Line Items]
Weighted average amortization period (years)	11 years	11 years
Gross carrying amount	$ 173,093	$ 173,063
Accumulated amortization	(108,948)	(99,439)
Net carrying Amount	$ 64,145	$ 73,624
Noncompete agreements
Goodwill And Intangible Assets [Line Items]
Weighted average amortization period (years)	5 years	5 years
Gross carrying amount	$ 14,500	$ 14,500
Accumulated amortization	(14,500)	(14,500)
Net carrying Amount	$ 0	$ 0
Favorable leases
Goodwill And Intangible Assets [Line Items]
Weighted average amortization period (years)		8 years
Gross carrying amount		$ 4,017
Accumulated amortization		(2,345)
Net carrying Amount		$ 1,672
Order backlog
Goodwill And Intangible Assets [Line Items]
Weighted average amortization period (years)	12 days	12 days
Gross carrying amount	$ 3,400	$ 3,400
Accumulated amortization	(3,400)	(3,400)
Net carrying Amount	$ 0	$ 0
Reacquired franchise rights
Goodwill And Intangible Assets [Line Items]
Weighted average amortization period (years)	7 years 8 months 12 days	7 years
Gross carrying amount	$ 28,089	$ 21,349
Accumulated amortization	(11,259)	(8,615)
Net carrying Amount	$ 16,830	$ 12,734

Goodwill and Intangible Asset_3

Goodwill and Intangible Assets - Additional Information (Detail)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2019USD ($)store	Sep. 30, 2018USD ($)store	Sep. 30, 2019USD ($)store	Sep. 30, 2018USD ($)store	Dec. 31, 2018USD ($)store	Jun. 30, 2019store	May 30, 2019store	Jun. 30, 2018store	Dec. 31, 2017store
Goodwill And Intangible Assets [Line Items]
Impairment charges | $			$ 0		$ 0
Number of owned and franchised locations | store	1,899	1,646	1,899	1,646	1,742	1,859		1,608	1,518
Amortization of intangible assets | $	$ 4,160,000	$ 4,027,000	$ 12,186,000	$ 12,052,000
Maine Acquisition
Goodwill And Intangible Assets [Line Items]
Number of owned and franchised locations | store							4

Goodwill and Intangible Asset_4

Goodwill and Intangible Assets - Summary of Amortization expenses (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Remainder of 2019	$ 4,146
2020	14,968
2021	15,053
2022	15,280
2023	15,185
Thereafter	16,343
Net carrying Amount	$ 80,975	$ 88,030

Long-Term Debt - Schedule of Lo

Long-Term Debt - Schedule of Long-Term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Total debt, excluding deferred financing costs	$ 1,188,000	$ 1,197,000
Deferred financing costs, net of accumulated amortization	(20,951)	(24,873)
Total debt	1,167,049	1,172,127
Current portion of long-term debt and line of credit	12,000	12,000
Long-term debt, net of current maturities	1,155,049	1,160,127
Class A-2-I notes | Senior fixed-rate term notes
Debt Instrument [Line Items]
Total debt, excluding deferred financing costs	569,250	573,563
Class A-2-II notes | Senior fixed-rate term notes
Debt Instrument [Line Items]
Total debt, excluding deferred financing costs	$ 618,750	$ 623,437

Long-Term Debt - Schedule of Fu

Long-Term Debt - Schedule of Future Annual Payments of Long-term Debt (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Debt Disclosure [Abstract]
Remainder of 2019	$ 3,000
2020	12,000
2021	12,000
2022	562,563
2023	6,250
Thereafter	592,187
Total	$ 1,188,000	$ 1,197,000

Long-Term Debt - Narrative (Det

Long-Term Debt - Narrative (Details)	Aug. 01, 2018USD ($)extension	Sep. 30, 2023	Aug. 31, 2018USD ($)	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Debt Instrument [Line Items]
Debt issuance costs incurred	$ 27,133,000			$ 0	$ 27,191,000
Restricted cash				30,499,000		$ 30,708,000
Loss on extinguishment of debt			$ 4,570,000	$ 0	$ 4,570,000
Interest rate caps | Cash Flow Hedging
Debt Instrument [Line Items]
Derivative liability, notional amount	219,837,000
Variable funding notes | Revolving Financing Facility
Debt Instrument [Line Items]
Debt face amount	$ 75,000,000
Commitment fee percentage	0.50%
Number of additional extensions | extension	2
Term of extension	1 year
Variable funding notes | Revolving Financing Facility | Scenario, Forecast
Debt Instrument [Line Items]
Line of credit interest rate		5.00%
Class A-2-I notes | Senior fixed-rate term notes
Debt Instrument [Line Items]
Fixed interest rate	4.262%
Debt face amount	$ 575,000,000
Class A-2-II notes | Senior fixed-rate term notes
Debt Instrument [Line Items]
Fixed interest rate	4.666%
Debt face amount	$ 625,000,000

Related Party Transactions - Ad

Related Party Transactions - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Related Party Transaction [Line Items]
Liability payable under tax benefit obligations	$ 55,478		$ 55,478		$ 59,458
Administrative fees charged	1,388	$ 2,369	4,060	$ 4,235
Planet Fitness NAF, LLC
Related Party Transaction [Line Items]
Administrative fees charged		$ 676		$ 1,872
Area Development Agreements
Related Party Transaction [Line Items]
Deferred area development revenue from related parties	260		260		$ 779
Administrative Service | Planet Fitness NAF, LLC
Related Party Transaction [Line Items]
Administrative fees charged	402		1,771
Civil Action Brought By Former Employee | Pending Litigation
Related Party Transaction [Line Items]
Receivables due from related parties	$ 412		$ 412

Related Party Transactions - Sc

Related Party Transactions - Schedule of Related Party Transactions (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Related Party Transaction [Line Items]
Total revenue from related parties	$ 1,388	$ 2,369	$ 4,060	$ 4,235
Franchise revenue
Related Party Transaction [Line Items]
Total revenue from related parties	505	897	1,735	2,453
Equipment revenue
Related Party Transaction [Line Items]
Total revenue from related parties	$ 883	$ 1,472	$ 2,325	$ 1,782

Stockholder's Equity - Addition

Stockholder's Equity - Additional Information (Detail) - USD ($)	Apr. 30, 2019	Nov. 14, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Nov. 13, 2018	Aug. 03, 2018
Class of Stock [Line Items]
Stock repurchase program, authorized amount								$ 500,000,000
Repurchase and retirement of common stock			$ 157,945,000	$ 42,090,000	$ 157,946,000	$ 42,090,000
Pla-Fit Holdings, LLC
Class of Stock [Line Items]
Number of shares exchanged					885,810
Holdings Units
Class of Stock [Line Items]
Number of shares exchanged					885,810
Investor | Secondary Offering and Exchange
Class of Stock [Line Items]
Number of units held by owners (in shares)			81,773,267		81,773,267
Investor | Pla-Fit Holdings, LLC | Secondary Offering and Exchange
Class of Stock [Line Items]
Percentage of economic interest					90.50%
Continuing LLC Owners | Secondary Offering and Exchange
Class of Stock [Line Items]
Number of units held by owners (in shares)			8,561,920		8,561,920
Continuing LLC Owners | Pla-Fit Holdings, LLC | Secondary Offering and Exchange
Class of Stock [Line Items]
Percentage of economic interest					9.50%
Holdings Units
Class of Stock [Line Items]
Shares exchanged for Class A common stock					1
Class A Common Stock
Class of Stock [Line Items]
Number of shares exchanged					885,810
Class A Common Stock | Investor | Secondary Offering and Exchange
Class of Stock [Line Items]
Number of units held by owners (in shares)			81,773,267		81,773,267
Class A Common Stock | Investor | Pla-Fit Holdings, LLC | Secondary Offering and Exchange
Class of Stock [Line Items]
Percentage of voting interests acquired			90.50%		90.50%
Class B Common Stock
Class of Stock [Line Items]
Shares exchanged for Class A common stock					1
Number of shares exchanged					885,810
Class B Common Stock | Continuing LLC Owners | Secondary Offering and Exchange
Class of Stock [Line Items]
Number of units held by owners (in shares)			8,561,920		8,561,920
Class B Common Stock | Continuing LLC Owners | Pla-Fit Holdings, LLC | Secondary Offering and Exchange
Class of Stock [Line Items]
Percentage of voting interests acquired			9.50%		9.50%
ASR Agreement
Class of Stock [Line Items]
Stock repurchase program, authorized amount							$ 300,000,000
Repurchase and retirement of common stock	$ 60,000,000	$ 240,000,000
ASR Agreement | Class A Common Stock
Class of Stock [Line Items]
Stock repurchased (in shares)	524,124	4,607,410	2,272,001
Weighted average cost per share (in dollars per share)	$ 58.46		$ 69.51

Earnings Per Share - Additional

Earnings Per Share - Additional Information (Detail) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Stock Options
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive securities excluded from the calculation of earnings per share	76,455	36,342	50,063	114,628
Restricted Stock Units
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive securities excluded from the calculation of earnings per share	713	0	1,688	11,245
Holdings Units
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Shares exchanged for Class A common stock			1
Class B Common Stock
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Shares exchanged for Class A common stock			1
Class B Common Stock | Equity Unit Purchase Agreements
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Anti-dilutive securities excluded from the calculation of earnings per share	8,579,094	10,004,682	8,798,695	10,550,857

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	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Numerator
Net income	$ 29,692	$ 20,472	$ 101,158	$ 74,384
Less: net income attributable to non-controlling interests	3,915	3,001	13,128	11,158
Net income attributable to Planet Fitness, Inc.	$ 25,777	$ 17,471	$ 88,030	$ 63,226
Stock Options
Effect of dilutive securities:
Weighted-average shares outstanding adjustment (in shares)	606,888	382,499	609,788	319,610
Restricted Stock Units
Effect of dilutive securities:
Weighted-average shares outstanding adjustment (in shares)	42,588	27,904	44,775	17,141
Class A Common Stock
Denominator
Weighted-average shares of Class A common stock outstanding - basic (in shares)	83,157,430	88,047,401	83,699,609	87,727,300
Effect of dilutive securities:
Weighted-average shares of Class A common stock outstanding - diluted (in shares)	83,806,906	88,457,804	84,354,172	88,064,051
Earnings per share of Class A common stock - basic (in dollars per share)	$ 0.31	$ 0.20	$ 1.05	$ 0.72
Earnings per share of Class A common stock - diluted (in dollars per share)	$ 0.31	$ 0.20	$ 1.04	$ 0.72

Income Taxes - Additional infor

Income Taxes - Additional information (Detail) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018	Sep. 30, 2019USD ($)agreementshares	Sep. 30, 2018	Dec. 31, 2018USD ($)
Tax Credit Carryforward [Line Items]
Effective income tax rate	25.80%	26.00%	21.00%	23.90%
Net deferred tax assets	$ 416,678		$ 416,678		$ 412,538
Total liability related to uncertain tax positions	260		$ 260		300
Number of tax receivable agreements | agreement			2
Percentage of remaining tax savings			15.00%
Tax benefit obligation	$ 433,390		$ 433,390		$ 429,233
TRA Holders
Tax Credit Carryforward [Line Items]
Applicable tax savings	85.00%		85.00%
Decrease in deferred tax assets			$ 517
Deferred tax asset	$ 20,340		20,340
Deferred tax liability	$ 17,016		$ 17,016
Class A Common Stock
Tax Credit Carryforward [Line Items]
Number of shares exchanged | shares			885,810
Class A Common Stock | TRA Holders
Tax Credit Carryforward [Line Items]
Number of shares exchanged | shares			885,810

Income Taxes - Schedule of Futu

Income Taxes - Schedule of Future Payments Under Tax Benefit Arrangements (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Remainder of 2019	$ 7,307
2020	25,965
2021	26,584
2022	27,141
2023	27,679
Thereafter	318,714
Total	$ 433,390	$ 429,233

Commitments and contingencies -

Commitments and contingencies - Additional Information (Details) - Pending Litigation - Civil Action Brought By Former Employee - USD ($) $ in Thousands	Sep. 30, 2019	May 03, 2019
Loss Contingencies [Line Items]
Damages sought	$ 4,272	$ 6,185
Estimate of possible loss	1,237
Loss contingency, receivable	1,237
Receivables due from related parties	$ 412

Segments - Additional Informati

Segments - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2019USD ($)	Sep. 30, 2018USD ($)	Sep. 30, 2019USD ($)segment	Sep. 30, 2018USD ($)	Dec. 31, 2018USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment			3
Number of operating segments | segment			0
Revenue	$ 166,815,000	$ 136,656,000	$ 497,292,000	$ 398,538,000
Assets	1,420,232,000		1,420,232,000		$ 1,353,416,000
Franchise revenue
Segment Reporting Information [Line Items]
Revenue	66,709,000	54,822,000	204,283,000	167,584,000
Franchise revenue | Placement Services
Segment Reporting Information [Line Items]
Revenue	4,277,000	2,518,000	12,112,000	7,694,000
Corporate-owned Stores
Segment Reporting Information [Line Items]
Revenue	40,742,000	$ 35,406,000	118,481,000	$ 102,365,000
Corporate-owned Stores | Canada
Segment Reporting Information [Line Items]
Long-lived assets	1,204,000		1,204,000		1,892,000
Intersegment Eliminations
Segment Reporting Information [Line Items]
Revenue			0
Operating Segments | Franchise revenue
Segment Reporting Information [Line Items]
Assets	189,192,000		189,192,000		185,899,000
Operating Segments | Corporate-owned Stores
Segment Reporting Information [Line Items]
Assets	390,101,000		390,101,000		243,221,000
Unallocated
Segment Reporting Information [Line Items]
Assets	$ 645,917,000		$ 645,917,000		713,834,000
Reclassification | Operating Segments | Franchise revenue
Segment Reporting Information [Line Items]
Assets					(133,523,000)
Reclassification | Unallocated
Segment Reporting Information [Line Items]
Assets					$ 133,523,000

Segments - Summary of Financial

Segments - Summary of Financial Information for the Company's Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Revenue	$ 166,815	$ 136,656	$ 497,292	$ 398,538
Total Segment EBITDA	64,832	52,409	199,005	156,911
Corporate And Other Non Segment
Segment Reporting Information [Line Items]
Total Segment EBITDA	(10,036)	(9,599)	(33,968)	(27,576)
Franchise revenue
Segment Reporting Information [Line Items]
Revenue	66,709	54,822	204,283	167,584
Franchise revenue | Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBITDA	44,328	37,075	141,548	113,793
Franchise revenue | US
Segment Reporting Information [Line Items]
Revenue	65,494	53,528	200,111	164,225
Franchise revenue | International
Segment Reporting Information [Line Items]
Revenue	1,215	1,294	4,172	3,359
Corporate-owned Stores
Segment Reporting Information [Line Items]
Revenue	40,742	35,406	118,481	102,365
Corporate-owned Stores | Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBITDA	16,799	15,279	50,505	42,115
Corporate-owned Stores | US
Segment Reporting Information [Line Items]
Revenue	39,637	34,323	115,178	99,020
Corporate-owned Stores | International
Segment Reporting Information [Line Items]
Revenue	1,105	1,083	3,303	3,345
Equipment revenue
Segment Reporting Information [Line Items]
Revenue	59,364	46,428	174,528	128,589
Equipment revenue | Operating Segments
Segment Reporting Information [Line Items]
Total Segment EBITDA	13,741	9,654	40,920	28,579
Equipment revenue | US
Segment Reporting Information [Line Items]
Revenue	$ 59,364	$ 46,428	$ 174,528	$ 128,589

Segments - Reconciliation of To

Segments - Reconciliation of Total Segment EBITDA to Income Before Taxes (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting [Abstract]
Total Segment EBITDA	$ 64,832	$ 52,409	$ 199,005	$ 156,911
Depreciation and amortization	11,832	8,863	32,316	25,947
Other expense	(61)	(27)	(4,824)	(338)
Income from operations	53,061	43,573	171,513	131,302
Interest income	1,808	2,025	5,585	2,480
Interest expense	(14,807)	(17,909)	(44,192)	(35,725)
Income before income taxes	$ 40,001	$ 27,662	$ 128,082	$ 97,719

Segments - Summary of Company's

Segments - Summary of Company's Assets by Reportable Segment (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	$ 1,420,232	$ 1,353,416
Operating Segments | Franchise revenue
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	189,192	185,899
Operating Segments | Corporate-owned Stores
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	390,101	243,221
Operating Segments | Equipment revenue
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	195,022	210,462
Unallocated
Segment Reporting, Asset Reconciling Item [Line Items]
Total consolidated assets	$ 645,917	$ 713,834

Segments - Summary of Company_2

Segments - Summary of Company's Goodwill by Reportable Segment (Detail) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Segment Reporting, Other Significant Reconciling Item [Line Items]
Goodwill, net carrying amount	$ 206,752	$ 199,513
Franchise revenue
Segment Reporting, Other Significant Reconciling Item [Line Items]
Goodwill, net carrying amount	16,938	16,938
Corporate-owned Stores
Segment Reporting, Other Significant Reconciling Item [Line Items]
Goodwill, net carrying amount	97,148	89,909
Equipment revenue
Segment Reporting, Other Significant Reconciling Item [Line Items]
Goodwill, net carrying amount	$ 92,666	$ 92,666

Corporate-Owned and Franchise_3

Corporate-Owned and Franchisee-Owned Stores - Schedule of Changes in Corporate-owned and Franchisee-owned Stores (Detail) - store	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Number Of Stores [Roll Forward]
Stores operated at beginning of period	1,859	1,608	1,742	1,518
New stores opened	41	41	159	132
Stores acquired, debranded, sold or consolidated	(1)	(3)	(2)	(4)
Stores operated at end of period	1,899	1,646	1,899	1,646
Franchisee-Owned Stores
Number Of Stores [Roll Forward]
Stores operated at beginning of period	1,779	1,540	1,666	1,456
New stores opened	39	40	157	131
Stores acquired, debranded, sold or consolidated	(1)	(7)	(6)	(14)
Stores operated at end of period	1,817	1,573	1,817	1,573
Corporate-Owned Stores
Number Of Stores [Roll Forward]
Stores operated at beginning of period	80	68	76	62
New stores opened	2	1	2	1
Stores acquired from franchisees	0	4	4	10
Stores operated at end of period	82	73	82	73

Revenue recognition - Schedule

Revenue recognition - Schedule of Contract Liabilities (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Contract liabilities
Beginning Balance	$ 49,862
Revenue recognized that was included in the contract liability at the beginning of the year	(23,082)
Increase, excluding amounts recognized as revenue during the period	29,390
Ending Balance	$ 56,170

Revenue recognition - Remaining

Revenue recognition - Remaining Performance Obligation (Details) $ in Thousands	Sep. 30, 2019USD ($)
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 56,170
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-10-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 12,422
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected timing of satisfaction	3 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 13,129
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2021-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 3,279
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 3,061
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 2,818
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected timing of satisfaction	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Revenue from Contract with Customer [Abstract]
Remaining performance obligation	$ 21,461
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected timing of satisfaction

Leases - Additional Information

Leases - Additional Information (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2019USD ($)
Lessee, Lease, Description [Line Items]
Lease payments for leases signed but not yet commenced	$ 34,456
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Renewal term	3 years
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	10 years
Renewal term	10 years

Leases - Balance Sheet Classifi

Leases - Balance Sheet Classification of Lease Assets and Liabilities (Details) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
Operating lease assets	$ 127,746
Finance lease assets	252
Total lease assets	127,998
Current operating lease liabilities	14,543
Noncurrent operating lease liabilities	127,646
Noncurrent finance lease liabilities	284
Total lease liabilities	$ 142,473
Weighted-average remaining lease term (years) - operating leases	8 years 10 months 24 days
Weighted-average discount rate - operating leases	5.10%

Leases Leases - Components of L

Leases Leases - Components of Lease Cost (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Operating lease cost	$ 5,317	$ 15,117
Variable lease cost	2,118	6,091
Total lease cost	$ 7,435	$ 21,208

Leases Leases - Supplemental Di

Leases Leases - Supplemental Disclosures of Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2019
Leases [Abstract]
Cash paid for lease liabilities	$ 4,958	$ 14,323
Operating assets obtained in exchange for operating lease liabilities	$ 16,173	$ 19,154

Leases Leases - Maturities of L

Leases Leases - Maturities of Lease Liabilities (Details) $ in Thousands	Sep. 30, 2019USD ($)
Leases [Abstract]
Remainder of 2019	$ 5,019
2020	21,491
2021	22,055
2022	21,751
2023	20,594
Thereafter	89,594
Total lease payments	180,504
Less: imputed interest	38,031
Present value of lease liabilities	$ 142,473

Leases - Under previous guidanc

Leases - Under previous guidance (Details) $ in Thousands	Dec. 31, 2018USD ($)
Leases [Abstract]
2019	$ 15,911
2020	15,219
2021	13,454
2022	12,561
2023	11,133
Thereafter	45,324
Total	$ 113,602