Fair value measurements (Tables)

9 Months Ended

Sep. 30, 2022

Fair Value Disclosures [Abstract]

Financial instruments measured at fair value on recurring basis

As of September 30, 2022, financial instruments measured at fair value on a recurring basis are summarized below:

	Level 1	Level 2	Fair value measurements
	($000 omitted)
Investments in securities:
Debt securities:
Municipal	—	30,119	30,119
Corporate	—	257,575	257,575
Foreign	—	278,511	278,511
U.S. Treasury Bonds	—	16,256	16,256
Equity securities	87,166	—	87,166
	87,166	582,461	669,627

As of December 31, 2021, financial instruments measured at fair value on a recurring basis are summarized below:

	Level 1	Level 2	Fair value measurements
	($000 omitted)
Investments in securities:
Debt securities:
Municipal	—	36,323	36,323
Corporate	—	258,102	258,102
Foreign	—	288,883	288,883
U.S. Treasury Bonds	—	6,464	6,464
Equity securities	89,442	—	89,442
	89,442	589,772	679,214