Long-Term Debt and Commitments (Tables)

9 Months Ended

Sep. 30, 2012

Long-Term Debt and Commitments [Abstract]

Summary of long-term debt

     The following is a summary of long-term debt:

(millions of dollars)			September 30, 2012		December 31, 2011
5.53% Series 2006A Senior Notes
	Due October 5, 2013		$	50.0	$	50.0
Floating Rate Series 2006A Senior Notes
	Due October 5, 2013			25.0		25.0
Variable/Fixed Rate Industrial
	Development Revenue Bonds Due August 1, 2012			---		8.0
Variable/Fixed Rate Industrial
	Development Revenue Bonds Series 1999 Due November 1, 2014			8.2		8.2
Installment obligations				1.4		1.4
Other Borrowings				1.1		1.4
		Total		85.7		94.0
Less: Current maturities				2.0		8.6
Long-term debt			$	83.7	$	85.4