Note 12 - Pension and Other Postretirement Benefit Plans (Details) - Amounts in Accumulated Other Comprehensive Income to be Recognized as Components of Net Periodic Expense for These Plans in 2013 (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Note 12 - Pension and Other Postretirement Benefit Plans (Details) - Amounts in Accumulated Other Comprehensive Income to be Recognized as Components of Net Periodic Expense for These Plans in 2013 [Line Items]
Net Actuarial loss (gain)	$ 1,225
Prior Service cost (credit)	(45)
Total	1,180
Retirement Plan [Member]
Note 12 - Pension and Other Postretirement Benefit Plans (Details) - Amounts in Accumulated Other Comprehensive Income to be Recognized as Components of Net Periodic Expense for These Plans in 2013 [Line Items]
Net Actuarial loss (gain)	1,162
Total	1,162
Other Postretirement Benefit Plans [Member]
Note 12 - Pension and Other Postretirement Benefit Plans (Details) - Amounts in Accumulated Other Comprehensive Income to be Recognized as Components of Net Periodic Expense for These Plans in 2013 [Line Items]
Net Actuarial loss (gain)	119
Prior Service cost (credit)	(85)
Total	34
Directors' Plan [Member]
Note 12 - Pension and Other Postretirement Benefit Plans (Details) - Amounts in Accumulated Other Comprehensive Income to be Recognized as Components of Net Periodic Expense for These Plans in 2013 [Line Items]
Net Actuarial loss (gain)	(56)
Prior Service cost (credit)	40
Total	$ (16)