Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2024

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

The following table presents the Company’s goodwill as reported on the Consolidated Balance Sheets as of December 31,:

	Integrated Agencies Network		Brand Performance Network		Communications Network		All Other		Total
Balance at December 31, 2021	$	1,153,073	$	358,613	$	115,777	$	25,260	$	1,652,723
Acquired goodwill	3,330		26,176		6,569		29,387		65,462
Impairment	(49,840)		(49,314)		—		(17,560)		(116,714)
Transfer of goodwill between segments (1)	(111,065)		111,065		—		—		—
Foreign currency translation	(11,422)		(13,467)		(753)		—		(25,642)
Other (2)	(15,682)		685		6,124		—		(8,873)
Balance at December 31, 2022	$	968,394	$	433,758	$	127,717	$	37,087	$	1,566,956
Acquired goodwill	18,451		2,626		—		—		21,077
Disposition	(98,779)		—		—		—		(98,779)
Transfer of goodwill between segments (1)	(8,517)		—		8,517		—		—
Foreign currency translation	1,846		5,056		353		271		7,526
Other (2)	—		220		—		1,815		2,035
Balance at December 31, 2023	$	881,395	$	441,660	$	136,587	$	39,173	$	1,498,815
Acquired goodwill	13,845		368		23,520		38,175		75,908
Disposition	—		—		—		(7,699)		(7,699)
Transfer of goodwill between segments (1)	4,122		(4,122)		—		—		—
Foreign currency translation	(6,485)		(4,149)		(784)		(738)		(12,156)
Other (2)	(731)		9		—		—		(722)
Balance at December 31, 2024	$	892,146	$	433,766	$	159,323	$	68,911	$	1,554,146

Schedule of Intangible Assets and Goodwill

The following presents the Company’s gross and net amounts of intangible assets other than goodwill as reported on the Consolidated Balance Sheets as of December 31,:

Intangible Assets	2024		2023
Customer relationships, gross	$	939,227	$	870,987
Accumulated amortization	(293,581)		(218,808)
Customer relationships, net	$	645,646	$	652,179
Trade names, gross	$	208,549	$	188,820
Accumulated amortization	(94,687)		(74,141)
Trade names, net	$	113,862	$	114,679
Capitalized software, gross	$	104,017	$	70,622
Accumulated amortization	(49,597)		(30,928)
Capitalized software, net	$	54,420	$	39,694
Developed technology and other, gross	$	37,890	$	21,583
Accumulated amortization	(15,035)		(9,915)
Developed technology and other, net	$	22,855	$	11,668
Total intangible assets, gross	$	1,289,683	$	1,152,012
Accumulated amortization	(452,900)		(333,792)
Total intangible assets, net	$	836,783	$	818,220

Finite-Lived Intangible Assets Amortization Expense

The estimated amortization expense for the five succeeding years is as follows:

Year	Amortization
2025	$	119,386
2026	117,048
2027	102,092
2028	87,055
2029	75,999
Thereafter	335,203
Total	$	836,783