Share Capital (Details Textual) $ / shares in Units, shares in Thousands, $ in Thousands			9 Months Ended
	Sep. 30, 2022 USD ($) vote $ / shares shares	Aug. 02, 2021 shares	Sep. 30, 2022 USD ($) vote $ / shares shares	Sep. 30, 2021 USD ($)	Mar. 23, 2022 USD ($)
Share Capital [Line Items]
Stock Repurchase Program, Authorized Amount | $					$ 125,000
Shares exchanged that trigger employee tax withholding obligation			5,000
Employee tax withholding obligation			2,000
Equity Exchange, Tax Withholding Obligation | $			$ 14,900
Stock Repurchased and Retired During Period, Shares	4,006
Shares acquired and cancelled | $			14,970	$ 820
Stock Repurchase Program, Remaining Authorized Repurchase Amount | $	$ 96,249		$ 96,249
Stock Repurchased and Retired During Period | $ / shares	$ 7.16		$ 7.16
Repurchase of Common Stock | $	$ 28,671		$ 28,667	$ 0
Common Class A
Share Capital [Line Items]
Common Stock, Shares Authorized	1,000,000		1,000,000
Common Stock, Shares, Issued	131,540		131,540
Common stock, voting rights, number of votes per share | vote	1		1
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.001		$ 0.001
Shares issued in exchange			15,594
Common Class B
Share Capital [Line Items]
Common Stock, Shares Authorized	5		5
Common Stock, Shares, Issued	4		4
Common stock, voting rights, number of votes per share | vote	20		20
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.001		$ 0.001
Common Class C
Share Capital [Line Items]
Common Stock, Shares Authorized	250,000		250,000
Common Stock, Shares, Outstanding	164,376		164,376
Common Stock, Par or Stated Value Per Share | $ / shares	$ 0.00001		$ 0.00001
MDC | Common Class C | Stagwell Media
Share Capital [Line Items]
Shares issued in acquisition		179,970