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Commitments and Contingencies (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2012 member | Sep. 30, 2021 store | Dec. 31, 2020 claim
Commitments and Contingencies Disclosure [Abstract] |  |  |
Guarantor obligations, number of leases | store |  | 72 |
Sample size | member | 200 |  |
Radcliffe and Flaim v. Aetna Inc., et al | Pending Litigation |  |  |
Loss Contingencies [Line Items] |  |  |
Number of claims | claim |  |  | 2

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- Definition Guarantor Obligations, Number of Leases + References No definition available. + Details
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- Definition Loss Contingency, Audit Methodology Sample Size + References No definition available. + Details
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- References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Number of pending claims pertaining to a loss contingency. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 + Details
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- Details
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- Details
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