Goodwill and other intangible assets (Tables)

9 Months Ended

Sep. 30, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of goodwill

The summary of changes in goodwill is as follows.

	Title	Ancillary Services and Corporate	Consolidated Total
		($000 omitted)
Balances at December 31, 2020	361,433	70,044	431,477
Acquisitions	103,744	9,777	113,521
Purchase accounting adjustments	(4,492)	(4,307)	(8,799)
Disposals	(23)	—	(23)
Balances at September 30, 2021	460,662	75,514	536,176