Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2011

Long-Term Debt [Abstract]

Schedule Of Outstanding Debt

	December 31
(In thousands)	2011		2010
Industrial development debt issues payable through 2022, 0.30%	$	4,000	$	4,000
Senior Notes payable through 2012, 8.39%		8,046		16,160
Senior Notes payable through 2021, 5.41%		60,000		60,000
Senior Notes payable through 2021, 4.00%		100,000		100,000
Senior revolving credit facility maturing in 2016		170,000		195,000
Note payable through 2011, net of unamortized discount of $66		—		1,934
Total		342,046		377,094
Amounts due within one year		8,000		10,000
Long-term debt		334,046		367,094