Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2015

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:


			March 31, 2015
	Total		(Level 1)		(Level 2)
	(Thousands of dollars)
Investments:
Money market mutual funds	$	18,055	$	18,055	$	—
U.S. Government agencies		8,012		—		8,012
Municipal bonds and notes		1,501		—		1,501
Corporate bonds and notes		177,397		—		177,397

		204,965		18,055		186,910
Deferred compensation plan assets		2,475		2,475		—

Total	$	207,440	$	20,530	$	186,910


			December 31, 2014
	Total		(Level 1)		(Level 2)
	(Thousands of dollars)
Investments:
Money Market Mutual Funds	$	68,612	$	68,612	$	—
Municipal bonds and notes		1,502		—		1,502
Corporate bonds and notes		130,615		—		130,615

		200,729		68,612		132,117
Deferred compensation plan assets		2,386		2,386		—

Total	$	203,115	$	70,998	$	132,117

- 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.

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