Comprehensive Income

3 Months Ended

Mar. 31, 2012

Comprehensive Income and Capital Stock [Abstract]

COMPREHENSIVE INCOME

NOTE 4—COMPREHENSIVE INCOME

Comprehensive income is summarized as follows:

(Thousands of dollars)	Three Months Ended March 31,
	2012			2011
Net income	$	100,216		$	68,316
Foreign currency translation adjustments		28,180			17,505
Amortization of net prior service costs and net actuarial losses, net of taxes (1)		3,397			3,249
Adjustments of marketable equity securities, net of taxes (2)		(19	)		19
Comprehensive income	$	131,774		$	89,089

⁽¹⁾  The tax effect of amortization of net prior service costs and net actuarial losses was $(3,020) for the three months ended March 31, 2012 and $(3,089) for the three months ended March 31, 2011.

⁽²⁾  The tax effect of adjustments of marketable equity securities was $12 for the three months ended March 31, 2012 and $(12) for the three months ended March 31, 2011.