Goodwill and Other Intangibles - Change in Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2019	Dec. 31, 2018
Goodwill [Line Items]
Goodwill		$ 73,312
Changes due to foreign currency exchange rate fluctuations	$ 10	(129)
Less: accumulated impairment of goodwill		(51,306)
Goodwill [Roll Forward]
Goodwill, beginning balance	21,877
Acquired goodwill	8,038
Measurement period adjustments	2,886
Changes due to foreign currency exchange rate fluctuations	10	(129)
Goodwill, ending balance	32,811	21,877
New York
Goodwill [Line Items]
Goodwill		38,376
Changes due to foreign currency exchange rate fluctuations	0	0
Less: accumulated impairment of goodwill		(31,549)
Goodwill [Roll Forward]
Goodwill, beginning balance	6,827
Acquired goodwill	0
Measurement period adjustments	(5)
Changes due to foreign currency exchange rate fluctuations	0	0
Goodwill, ending balance	6,822	6,827
Boston
Goodwill [Line Items]
Goodwill		23,348
Changes due to foreign currency exchange rate fluctuations	0	0
Less: accumulated impairment of goodwill		(15,775)
Goodwill [Roll Forward]
Goodwill, beginning balance	7,573
Acquired goodwill	0
Measurement period adjustments	544
Changes due to foreign currency exchange rate fluctuations	0	0
Goodwill, ending balance	8,117	7,573
California
Goodwill [Line Items]
Goodwill		1,584
Changes due to foreign currency exchange rate fluctuations	0	0
Less: accumulated impairment of goodwill		0
Goodwill [Roll Forward]
Goodwill, beginning balance	1,584
Acquired goodwill	0
Measurement period adjustments	0
Changes due to foreign currency exchange rate fluctuations	0	0
Goodwill, ending balance	1,584	1,584
Florida
Goodwill [Line Items]
Goodwill		2,467
Changes due to foreign currency exchange rate fluctuations	0	0
Less: accumulated impairment of goodwill		0
Goodwill [Roll Forward]
Goodwill, beginning balance	2,467
Acquired goodwill	8,038
Measurement period adjustments	2,079
Changes due to foreign currency exchange rate fluctuations	0	0
Goodwill, ending balance	12,584	2,467
Puerto Rico
Goodwill [Line Items]
Goodwill		2,380
Changes due to foreign currency exchange rate fluctuations	0	0
Less: accumulated impairment of goodwill		0
Goodwill [Roll Forward]
Goodwill, beginning balance	2,380
Acquired goodwill	0
Measurement period adjustments	268
Changes due to foreign currency exchange rate fluctuations	0	0
Goodwill, ending balance	2,648	2,380
Switzerland
Goodwill [Line Items]
Goodwill		1,175
Changes due to foreign currency exchange rate fluctuations	10	(129)
Less: accumulated impairment of goodwill		0
Goodwill [Roll Forward]
Goodwill, beginning balance	1,046
Acquired goodwill	0
Measurement period adjustments	0
Changes due to foreign currency exchange rate fluctuations	10	(129)
Goodwill, ending balance	1,056	1,046
Outlier Clubs
Goodwill [Line Items]
Goodwill		3,982
Changes due to foreign currency exchange rate fluctuations	0	0
Less: accumulated impairment of goodwill		(3,982)
Goodwill [Roll Forward]
Goodwill, beginning balance	0
Acquired goodwill	0
Measurement period adjustments	0
Changes due to foreign currency exchange rate fluctuations	0	0
Goodwill, ending balance	$ 0	$ 0

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266

+ Details

Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillAcquiredDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillForeignCurrencyTranslationGainLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (h)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillImpairedAccumulatedImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_GoodwillLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 16
-URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e961-128460

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267

+ Details

Name:	us-gaap_GoodwillPurchaseAccountingAdjustments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

+ Details

Name:	us-gaap_GoodwillRollForward
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	srt_StatementGeographicalAxis=stpr_NY
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_MA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_CA
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=stpr_FL
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=country_PR
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=country_CH
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementGeographicalAxis=club_OutlierClubsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: