Fair value measurements (Tables)

3 Months Ended

Mar. 31, 2022

Fair Value Disclosures [Abstract]

Financial instruments measured at fair value on recurring basis

As of March 31, 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	—	33,182	33,182
Corporate	—	248,050	248,050
Foreign	—	301,284	301,284
U.S. Treasury Bonds	—	6,880	6,880
Equity securities	103,019	—	103,019
	103,019	589,396	692,415

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