Note 9 - Components of Accumulated Other Comprehensive Loss (Details) - Components of Accumulated Other Comprehensive Loss (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Jun. 30, 2013 Accumulated Net Unrealized Investment Gain (Loss) [Member]	Jun. 30, 2014 Accumulated Defined Benefit Plans Adjustment [Member]	Dec. 31, 2013 Accumulated Defined Benefit Plans Adjustment [Member]	Jun. 30, 2013 Accumulated Defined Benefit Plans Adjustment [Member]	Dec. 31, 2012 Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance			$ (16,964)	$ (2,738)	$ (14,011)	$ 2,047	$ (2,953)	$ (2,953)	$ (4,785)	$ (4,785)
Unrealized Holding Gains (Losses)	3,091	(8,500)	6,212	(9,458)	6,212	(9,458)
Reclassification Adjustment		(6)		(12)		(12)
Balance	$ (10,752)	$ (12,208)	$ (10,752)	$ (12,208)	$ (7,799)	$ (7,423)	$ (2,953)	$ (2,953)	$ (4,785)	$ (4,785)