UNAUDITED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2025	Dec. 31, 2024
Current Assets
Cash and cash equivalents	$ 137,653	$ 131,339
Accounts receivable, net	772,974	716,415
Expenditures billable to clients	163,702	173,194
Other current assets	147,163	114,200
Total Current Assets	1,221,492	1,135,148
Fixed assets, net	69,017	72,706
Operating Lease, Right-of-Use Asset	209,720	219,400
Goodwill	1,562,490	1,554,146
Other intangible assets, net	822,964	836,783
Other assets	96,671	90,038
Total Assets	3,982,354	3,908,221
Current Liabilities
Accounts payable	420,779	449,347
Accrued media	295,964	245,883
Accruals and other liabilities	219,047	265,356
Advance billings	311,329	294,609
Current portion of lease liabilities - operating leases	56,390	60,195
Current portion of deferred acquisition consideration	37,336	51,906
Total Current Liabilities	1,340,845	1,367,296
Long-term debt	1,465,323	1,353,624
Long-term portion of deferred acquisition consideration	55,941	50,209
Long-term lease liabilities - operating leases	224,323	245,397
Deferred tax liabilities, net	47,323	47,239
Other liabilities	57,850	59,139
Total Liabilities	3,191,605	3,122,904
Redeemable Noncontrolling Interests	10,856	8,412
Commitments and Contingencies
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Paid-in capital	343,082	343,647
Retained earnings	10,504	11,740
Accumulated other comprehensive loss	(19,302)	(23,773)
Stagwell Inc. Shareholders’ Equity	334,400	331,731
Noncontrolling interests	445,493	445,174
Total Shareholders’ Equity	779,893	776,905
Liabilities and Equity, Total	3,982,354	3,908,221
Common Class A and Common Class B
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common shares	114	115
Common Class C
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]
Common shares	$ 2	$ 2