Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2021

Fair Value Disclosures [Abstract]

Schedule of Company's Financial Assets and (Liabilities) at Fair Value on Recurring Basis

The following table summarizes the basis used to measure the Company’s financial assets (liabilities) at fair value on a recurring basis in the balance sheets at September 30, 2021 and December 31, 2020:

	Basis of Fair Value Measurements
	Balance at September 30, 2021		Level 1		Level 2		Level 3
Trading securities - mutual funds held in nonqualified SERP(1)	$	10,842	$	10,842	$	—	$	—
Trading securities - fixed income(2)	9,834		9,834		—		—
Trading securities - equities(2)	1,061		1,061		—		—

	Basis of Fair Value Measurements
	Balance at December 31, 2020		Level 1		Level 2		Level 3
Trading securities - mutual funds held in nonqualified SERP(1)	$	13,554	$	13,554	$	—	$	—

(1) The Supplemental Executive Retirement Plan (“SERP”) investment assets are offset by a SERP liability which represents the Company’s obligation to distribute SERP funds to participants.

(2) See Note 19 for further discussion of surplus plan assets following the termination of the IDEX Corporation Retirement Plan.