Stockholders' Equity and Accumulated Other Comprehensive Loss (Tables)

6 Months Ended

Jun. 30, 2012

Stockholders' Equity and Accumulated Other Comprehensive Loss

Schedule of components of and changes in accumulated other comprehensive loss, net of related taxes

	Balance						Balance
	December 31,			Period			June 30,
(Thousands of dollars)	2011			Change			2012
Cumulative foreign currency translation adjustment	$	(93,669	)	$	(3,141	)	$	(96,810	)
Unrealized gain (loss) on investments	(311		)	1,171			860
Unrealized loss on cash flow hedges	-			(91		)	(91		)
Unrecognized pension cost	(62,085		)	3,320			(58,765		)
Accumulated other comprehensive loss	$	(156,065	)	$	1,259		$	(154,806	)