Long-term Debt (Tables)

12 Months Ended

Dec. 31, 2011

Long-term Debt

	December 31
(Thousands of dollars)	2011			2010
Notes payable
6.375% notes, due 2012, net of unamortized discount of $38 at December 31, 2011	$	349,962			349,846
7.05% notes, due 2029, net of unamortized discount of $1,616 at December 31, 2011		248,384			248,291
Notes payable to banks, 0.7375% at December 31, 2010		0			340,000
Other, 6%, due through 2028		1,212			1,254
Total debt including current maturities		599,558			939,391
Current maturities		(350,005	)		(41	)
Total long-term debt	$	249,553			939,350