Note 12 - Postretirement Medical Benefits (Details) - The Following Disclosures of the Net Periodic Benefit Cost Components (Postretirement Medical Benefits [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Postretirement Medical Benefits [Member]
Note 12 - Postretirement Medical Benefits (Details) - The Following Disclosures of the Net Periodic Benefit Cost Components [Line Items]
Service cost	$ 630	$ 617
Interest cost	551	608
Amortization of transition obligation	0	102
Recognized prior service cost	257	257
Amortization of net actuarial loss	0	56
Net periodic benefit cost	$ 1,438	$ 1,640
Major assumptions:
Discount rate used to determine net periodic benefit cost	4.03%	4.39%
Discount rate used to determine benefit obligation as of year end	4.93%	4.03%
Retiree participation rate (Plan 1)	100.00%	100.00%
Retiree participation rate (Plan 2)	72.00%	72.00%