Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2018

Summary of Valuation of Investments and Financial Instruments Pricing Levels

The following table summarizes the valuation of our investments and financial instruments by the above pricing levels as of the valuation dates listed:



			June 30, 2018
	Total		(Level 1)		(Level 2)
	(Thousands of dollars)
Investments:
Money market mutual funds	$	72,393	$	72,393	$	—
Deferred compensation plan assets	823		823		—
Total	$	73,216	$	73,216	$	—

			December 31, 2017
	Total		(Level 1)		(Level 2)
	(Thousands of dollars)
Investments:
Money market mutual funds	$	5,601	$	5,601	$	—
U.S. government agencies	7,467		—		7,467
Corporate bonds and notes	63,550		—		63,550
	76,618		5,601		71,017
Deferred compensation plan assets	2,685		2,685		—
Total	$	79,303	$	8,286	$	71,017

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

+ References + Details