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Conversion of Stock, Shares Related To Employee Tax Withholding Obligation

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Increase (Decrease) in Profit Interest Award, Liability

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Profit Interest Award, Liability

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Repurchase of Common Stock

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Share-Based Payment Arrangement, Noncash Expense, Income Tax Benefit

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Stock Repurchase Program, Increase in Authorized Amount

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Stock Repurchased and Retired During Period

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Aggregate number of common shares reserved for future issuance.

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Face amount or stated value per share of common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of noncash expense for share-based payment arrangement.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options.

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Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Intrinsic value of outstanding award under share-based payment arrangement. Excludes share and unit options.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of options vested.

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Number of shares of stock issued during the period pursuant to acquisitions.

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Amount of stock repurchase plan authorized.

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Amount remaining of a stock repurchase plan authorized.

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Number of shares that have been repurchased and retired during the period.

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Share Capital (Details Textual) $ / shares in Units, $ in Thousands					12 Months Ended
	Sep. 30, 2022 USD ($) shares	Nov. 08, 2021 shares	Oct. 07, 2021 shares	Aug. 02, 2021 $ / shares shares	Dec. 31, 2022 USD ($) vote $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2020 USD ($)	Mar. 01, 2023 USD ($)	Mar. 23, 2022 USD ($)
Share Capital [Line Items]
Stock Repurchase Program, Authorized Amount									$ 125,000
Shares exchanged that trigger employee tax withholding obligation \| shares					5,000,000
Employee tax withholding obligation \| shares					2,000,000
Equity Exchange, Tax Withholding Obligation					$ 14,900
Stock Repurchased and Retired During Period, Shares \| shares	7,194,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount					$ 73,309
Stock Repurchased and Retired During Period \| $ / shares					$ 7.17
Repurchase of Common Stock	$ 51,547				$ 51,540	$ 0	$ 0
Common Stock, Capital Shares Reserved for Future Issuance \| shares					12,858,000	2,839,000
Stock-based compensation					$ 33,152	$ 75,032
Increase (Decrease) in Profit Interest Award, Liability					$ (4,179)	$ 536
Subsequent event
Share Capital [Line Items]
Stock Repurchase Program, Authorized Amount								$ 250,000
Stock Repurchase Program, Increase in Authorized Amount								$ 125,000
Performance-Based Awards
Share Capital [Line Items]
Grant date fair value of options granted (in dollars per share) \| $ / shares					$ 7.74	$ 8.68
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition					1 year 10 months 9 days	2 years 4 months 13 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms					1 year 10 months 9 days	2 years 4 months 13 days
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount					$ 12,781	$ 8,221
Stock Appreciation Rights (SARs)
Share Capital [Line Items]
Grant date fair value of options granted (in dollars per share) \| $ / shares					$ 2.78	$ 2.79
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition					1 year 5 months 12 days	1 year 1 month 24 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate					4.00%	1.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate					0.00%	0.00%
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period						5 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Exercisable, Number \| shares					3,845,000	1,950
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding					$ 11,063	$ 19,677
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms					1 year 5 months 12 days	1 year 1 month 24 days
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount					$ 1,175	$ 4,639
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term					4 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Number of Shares \| shares					1,943	1,950
Stock Appreciation Rights (SARs) \| Minimum
Share Capital [Line Items]
Grant date fair value of options granted (in dollars per share) \| $ / shares						$ 2.20
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term					2 years	2 years 9 months 18 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate					37.00%	35.50%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period						1 year
Stock Appreciation Rights (SARs) \| Maximum
Share Capital [Line Items]
Grant date fair value of options granted (in dollars per share) \| $ / shares						$ 3.66
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term					3 years	4 years
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate					41.40%	38.10%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period						3 years
Time-Based Awards
Share Capital [Line Items]
Grant date fair value of options granted (in dollars per share) \| $ / shares					$ 7.07	$ 5.49
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition					7 months 24 days	4 months 13 days
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms					7 months 24 days	4 months 13 days
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount					$ 16,449	$ 15,376
Restricted Stock and Restricted Stock Units
Share Capital [Line Items]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value					77,332	1,527
Other Awards
Share Capital [Line Items]
Profit interest award liability					20,961	36,418
Stock Compensation Award
Share Capital [Line Items]
Stock-based compensation					36,663
Share-Based Payment Arrangement, Noncash Expense, Income Tax Benefit					$ 4,106	$ 5,289
Common Class A
Share Capital [Line Items]
Common Stock, Shares Authorized \| shares					1,000,000,000
Common Stock, Shares, Issued \| shares					131,720,000
Common stock, voting rights, number of votes per share \| vote					1
Shares issued in exchange \| shares		20,949,000	12,087,000		19,061,000
Common Class B
Share Capital [Line Items]
Common Stock, Shares Authorized \| shares					5,000
Common Stock, Shares, Issued \| shares					4,000
Common stock, voting rights, number of votes per share \| vote					20
Common Class C
Share Capital [Line Items]
Common Stock, Shares Authorized \| shares					250,000,000
Common Stock, Shares, Outstanding \| shares					160,909,000
MDC \| Common Class B
Share Capital [Line Items]
Common Stock, Par or Stated Value Per Share \| $ / shares				$ 0.001
MDC \| Common Class C \| Stagwell Media
Share Capital [Line Items]
Shares issued in acquisition \| shares				179,970,000