Short-Term and Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2013

Debt Disclosure [Abstract]

Schedule Of Outstanding Debt

	December 31,
(In thousands)	2013		2012
Industrial development debt issues payable through 2022, 0.30%	$	4,000	$	4,000
2006 Senior Notes payable through 2021, 5.41%	53,334		60,000
2010 Senior Notes payable through 2021, 4.00%	100,000		100,000
Senior revolving credit facility maturing in 2016	110,000		115,000
Total	267,334		279,000
Amounts due within one year	6,667		6,667
Long-term debt	260,667		272,333