Note 12 - Pension and Other Postretirement Benefit Plans (Details) - Amounts Recognized in Accumulated Other Comprehensive Income, on a Pre-Tax Basis (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Note 12 - Pension and Other Postretirement Benefit Plans (Details) - Amounts Recognized in Accumulated Other Comprehensive Income, on a Pre-Tax Basis [Line Items]
Net Actuarial loss (gain)	$ 5,608	$ 12,633	$ 12,857
Prior Service cost (credit)	(537)	(584)	(629)
Total	5,071	12,049	12,228
Retirement Plan [Member]
Note 12 - Pension and Other Postretirement Benefit Plans (Details) - Amounts Recognized in Accumulated Other Comprehensive Income, on a Pre-Tax Basis [Line Items]
Net Actuarial loss (gain)	5,899	11,843	12,223
Total	5,899	11,843	12,223
Other Postretirement Benefit Plans [Member]
Note 12 - Pension and Other Postretirement Benefit Plans (Details) - Amounts Recognized in Accumulated Other Comprehensive Income, on a Pre-Tax Basis [Line Items]
Net Actuarial loss (gain)	205	1,199	1,028
Prior Service cost (credit)	(708)	(794)	(879)
Total	(503)	405	149
Directors' Plan [Member]
Note 12 - Pension and Other Postretirement Benefit Plans (Details) - Amounts Recognized in Accumulated Other Comprehensive Income, on a Pre-Tax Basis [Line Items]
Net Actuarial loss (gain)	(496)	(409)	(394)
Prior Service cost (credit)	171	210	250
Total	$ (325)	$ (199)	$ (144)