Goodwill (Tables)

6 Months Ended

Jun. 30, 2021

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in Carrying Value of Goodwill by Operating Segment

The changes in the carrying value of goodwill by reportable segment for the six months ended June 30, 2021 are as follows:

(in thousands)	Retail			National Programs			Wholesale Brokerage		Services		Total
Balance as of December 31, 2020	$	2,650,470		$	1,091,122		$	483,057	$	171,269	$	4,395,918
Goodwill of acquired businesses		122,612			(1,337	)		553		—		121,828
Goodwill disposed of relating to sales of businesses		(3,050	)		—			—		—		(3,050	)
Foreign currency translation adjustments during the year		(2,421	)		1,695			—		—		(726	)
Balance as of June 30, 2021	$	2,767,611		$	1,091,480		$	483,610	$	171,269	$	4,513,970