Fair value measurements (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Financial instruments measured at fair value on recurring basis

As of September 30, 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	—	39,885	39,885
Corporate	—	292,119	292,119
Foreign	—	278,808	278,808
U.S. Treasury Bonds	—	6,466	6,466
Equity securities	83,441	—	83,441
	83,441	617,278	700,719

As of December 31, 2020, 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	—	47,603	47,603
Corporate	—	305,450	305,450
Foreign	—	271,711	271,711
U.S. Treasury Bonds	—	6,622	6,622
Equity securities	53,001	—	53,001
	53,001	631,386	684,387