Goodwill and other intangibles (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Summary of changes in goodwill

The summary of changes in goodwill is as follows.

	Title	Ancillary Services and Corporate	Consolidated Total
		($000 omitted)
Balances at December 31, 2017	225,699	5,729	231,428
Acquisitions	11,308	—	11,308
Balances at March 31, 2018	237,007	5,729	242,736