Note 9 - Employee Benefit Plans (Details) (USD $)	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013
Compensation and Retirement Disclosure [Abstract]
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, before Tax	$ 10,997,000	$ 10,997,000
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	6,499,000	6,499,000
Defined Benefit Plans, Estimated Future Employer Contributions in Current Fiscal Year		$ 1,000,000