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Note 6 - Employee Benefit Plans (Detail) - Health Care Benefit Cost Assumptions	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Health care cost trend rate assumed for next year	8.40%	8.60%
Ultimate rate to which the cost trend rate is assumed to decline	4.50%	4.50%
Year that reaches ultimate trend rate	2030	2030

The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

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