Note 7 - Employee Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Note 7 - Employee Benefit Plans (Details) [Line Items]
Defined Benefit Plans, Estimated Future Employer Contributions in Next Fiscal Year (in Dollars)	$ 0.7
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year (in Dollars)	$ 0.3
Pension Compensation [Member]
Note 7 - Employee Benefit Plans (Details) [Line Items]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	6.00%
Pension Compensation in Excess of Social Security Wages [Member]
Note 7 - Employee Benefit Plans (Details) [Line Items]
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent	5.70%
Years 1 through 5 [Member]
Note 7 - Employee Benefit Plans (Details) [Line Items]
Cash Balance Pay Credit Percentage	3.00%
Years 6 through 10 [Member]
Note 7 - Employee Benefit Plans (Details) [Line Items]
Cash Balance Pay Credit Percentage	4.50%
After 10 Years [Member]
Note 7 - Employee Benefit Plans (Details) [Line Items]
Cash Balance Pay Credit Percentage	6.00%