Note 9 - Benefit Plans (Detail) - Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Corporate [Member]
Benefit Obligations Discount Rate	3.93%	4.35%
Benefit Obligations Long Term Rate of Return	8.00%	8.00%
Benefit Obligations Salary Scale	3.00%	3.50%
Net Periodic Benefit Cost Discount Rate	4.35%	5.49%
Net Periodic Benefit Cost Long Term Rate of Return	8.00%	8.00%
Net Periodic Benefit Cost Salary Scale	3.50%	4.50%
Plants [Member]
Benefit Obligations Discount Rate	3.77%	4.23%
Benefit Obligations Long Term Rate of Return	8.00%	8.00%
Net Periodic Benefit Cost Discount Rate	4.23%	5.28%
Net Periodic Benefit Cost Long Term Rate of Return	8.00%	8.00%