Note 12 - Pension and Other Postretirement Benefit Plans (Detail) - Assumptions used to develop periodic pension benefit for the Retirement Plan:	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Weighted average discount rate	4.25%	5.75%	5.75%
Retirement Plan [Member]
Weighted average discount rate	4.25%	5.25%	5.75%
Expected long-term rate of return on assets	7.50%	8.00%	8.50%