Note 7 - Employee Benefit Plans (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Other Comprehensive Income Reclassification Of Defined Benefit Plan Prior Service Cost And Net Actuarial Loss	$ 159,000
Defined Benefit Plan, Contributions by Employer	0
Other Comprehensive Income Reclassification Of Defined Benefit Plan Expected Return On Plan Assets And Net Actuarial Loss	12,000
Pension Contributions	$ 0
Common Stock, Shares Authorized (in Shares)	40,000,000	40,000,000	40,000,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number (in Shares)	1,338,386