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Note 12 - Pension and Other Postretirement Benefit Plans (Detail) - Assumptions used in determining the actuarial present value of the accumulated postretirement benefit obligations:	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Rate of increase in health care costs
Initial	10.50%	11.50%	12.00%
Ultimate (year 2017)	5.50%	5.50%	5.00%
Postretirement Plans [Member]
Discount rate	3.75%	4.25%
Rate of increase in health care costs
Initial	10.00%	10.50%
Ultimate (year 2017)	5.00%	5.50%

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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