Accounting policies.

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Number of customers.

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Contract payment due conditions.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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No definition available.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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The amortization method of a major finite-lived intangible asset class. A major class is composed of intangible assets that can be grouped together because they are similar either by their nature or by their use in the operations of a company. The straight-line method is the preferred amortization method, unless another method better reflects the pattern in which the asset is consumed.

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Amount of loss from the write-down 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.

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Description of terms and conditions of option to extend lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability.

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Description of terms and conditions of option to terminate lessee's operating lease. Includes, but is not limited to, information about option recognized as part of right-of-use asset and lease liability.

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Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of reporting units tested for impairment of goodwill. A reporting unit is an operating segment or one level below an operating segment.

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Description of the methodology for computing depreciation for classes of depreciable assets.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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The aggregate total amount of expenses directly related to the marketing or selling of products or services.

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Summary of Significant Accounting Policies - Additional Information (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) Customer Segment ReportingUnit	Dec. 31, 2021 USD ($) Customer ReportingUnit	Dec. 31, 2020 USD ($) ReportingUnit Customer
Accounting Policies [Line Items]
Number of operating segments \| Segment	1
Property and equipment, depreciation description	Depreciation is computed using the straight-line method over the estimated useful lives of the assets
Equity investments included in other assets	$ 19,000,000.0	$ 4,000,000.0
Number of reporting unit tested for goodwill impairment \| ReportingUnit	1	1	1
Goodwill impairment	$ 0	$ 0	$ 0
Noncancellable operating lease option to renewal description	Certain of our leases contain renewal options for periods of up to ten years
Lessee, Operating Lease, Renewal Term	10 years
Lessee, Operating Lease, Option to Terminate	early termination options by up to two years, at our election.
Sales and marketing	$ 357,631,000	370,217,000	255,135,000
Fair value of debt	$ 649,600,000
Contract payment due conditions	Payments are due generally within thirty to ninety days of invoice but may extend up to twelve months for a limited number of contracts.
Advertising costs	$ 226,300,000	296,600,000	$ 222,400,000
Minority Equity Interests
Accounting Policies [Line Items]
Equity method investment, ownership percentage	20.00%
Prescription Transactions Revenue
Accounting Policies [Line Items]
Sales and marketing	$ 24,700,000
Capitalized Software Costs
Accounting Policies [Line Items]
Intangible asset, amortization method	amortized on a straight-line basis over their estimated useful life
Finite lived intangible assets acquired, Estimated Useful Life	3 years
Furniture and Fixtures
Accounting Policies [Line Items]
Useful life of assets	5 years
Computer Equipment
Accounting Policies [Line Items]
Useful life of assets	3 years
Money Market Funds \| Fair Value, Inputs, Level 1
Accounting Policies [Line Items]
Cash equivalents, fair value disclosure	$ 642,500,000	$ 852,500,000
Customer Concentration Risk \| Revenue From Customer
Accounting Policies [Line Items]
Number of customers \| Customer	1	2	3
Customer Concentration Risk \| Revenue From Customer \| Customer One
Accounting Policies [Line Items]
Concentration risk percentage	13.00%	13.00%	17.00%
Customer Concentration Risk \| Revenue From Customer \| Customer Two
Accounting Policies [Line Items]
Concentration risk percentage		11.00%	14.00%
Customer Concentration Risk \| Revenue From Customer \| Customer Three
Accounting Policies [Line Items]
Concentration risk percentage			11.00%
Customer Concentration Risk \| Accounts Receivable \| Customer One
Accounting Policies [Line Items]
Concentration risk percentage	13.00%
Credit Concentration Risk \| Accounts Receivable
Accounting Policies [Line Items]
Number of customers \| Customer	1	0
Credit Concentration Risk \| Accounts Receivable \| Customer One
Accounting Policies [Line Items]
Concentration risk percentage		10.00%