Note 8 - Employee Benefit Plans (Details) - Components of Net Periodic Benefit Cost to be Recognized Over Next Fiscal Year (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2015
Note 8 - Employee Benefit Plans (Details) - Components of Net Periodic Benefit Cost to be Recognized Over Next Fiscal Year [Line Items]
Amortization of prior service benefit	$ (337)	$ 66	$ 401
Amounts Expected to be Recognized in 2015 [Member]
Note 8 - Employee Benefit Plans (Details) - Components of Net Periodic Benefit Cost to be Recognized Over Next Fiscal Year [Line Items]
Amortization of net loss				3,459
Amortization of prior service benefit				$ (352)