UNAUDITED CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income	$ 58,141	$ 23,262
Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Stock-based compensation	21,152	0
Depreciation and amortization	63,435	21,331
Impairment and other losses	2,823	0
Provision for bad debt expense	1,641	381
Deferred income taxes	(1,325)	138
Adjustment to deferred acquisition consideration	15,390	2,359
Transaction costs contributed by Stagwell Media LP	0	5,042
Other	(6,059)	952
Changes in working capital:
Accounts receivable	(78,342)	28,960
Expenditures billable to clients	20,386	(4,752)
Other assets	(8,555)	(676)
Accounts payable	(33,228)	(40,344)
Accrued expenses and other liabilities	(109,232)	(1,037)
Advance billings	(46,391)	3,603
Deferred acquisition related payments	(7,107)	0
Net Cash Provided by (Used in) Operating Activities, Total	(107,271)	39,218
Cash flows from investing activities:
Capital expenditures	(14,467)	(7,288)
Current period acquisitions, net of cash acquired	(38,326)	0
Other	(2,144)	0
Net Cash Provided by (Used in) Investing Activities, Total	(54,937)	(7,288)
Repayment of borrowings under revolving credit facility
Repayment of borrowings under revolving credit facility	(473,000)	(25,496)
Proceeds from borrowings under revolving credit facility	660,500	10,000
Shares acquired and cancelled	14,926	0
Distributions to noncontrolling interests and other	(36,498)	0
Payment of deferred consideration	(52,431)	0
Distributions	0	(37,214)
Repurchase of Common Stock	(14,839)	0
Net Cash Provided by (Used in) Financing Activities, Total	65,206	(52,710)
Effect of exchange rate changes on cash and cash equivalents	6,395	1,773
Net decrease in cash and cash equivalents	(90,607)	(19,007)
Cash and cash equivalents at beginning of period	184,009	92,457
Cash and cash equivalents at end of period	93,402	73,450
Supplemental disclosures:
Cash income taxes paid	15,871	4,649
Cash interest paid	30,798	3,047
Non-cash investing and financing activities:
Reduction of deferred tax liability related to the exchange of Paired Units	25,159	0
Establishment of Tax Receivables Agreement liability	21,385	0
Non-cash contributions	0	12,122
Non-cash distributions to Stagwell Media LP	0	13,000
Non-cash payment of deferred acquisition consideration	0	7,080
Purchase of noncontrolling interest	$ 3,600	$ 0